NHTSA owner reports · September 18, 2026 snapshot.
Electronic Stability Control (esc) complaints
33 reportsClear category filter118,832 miles · Dec 20, 2014
Electronic Stability Control (esc)Service Brakes
THIS IS A SEQUEL REPORT TO MY ODI 10664733 OF 12/16/2014. TWO INCIDENTS ARE IDENTICAL. THE EARLIER INCIDENT HAPPENED AT ODOMETER READING 118,714; THIS SECOND INCIDENT HAPPENED AT 118,832, 118 MILES LATER. I WAS ON I-280 SOUTHBOUND APPROX. 53 MILES SOUTH OF SF. AROUND 1PM, A SUDDEN EXTRAORDINARILY FORCEFUL BRAKING ? THE MERCEDES…
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THIS IS A SEQUEL REPORT TO MY ODI 10664733 OF 12/16/2014. TWO INCIDENTS ARE IDENTICAL. THE EARLIER INCIDENT HAPPENED AT ODOMETER READING 118,714; THIS SECOND INCIDENT HAPPENED AT 118,832, 118 MILES LATER. I WAS ON I-280 SOUTHBOUND APPROX. 53 MILES SOUTH OF SF. AROUND 1PM, A SUDDEN EXTRAORDINARILY FORCEFUL BRAKING ? THE MERCEDES OWNER?S MANUAL CALLS THIS MAXIMUM BRAKING CAPABILITY POWER BOOST WHICH EXCEEDS DRIVER?S MANUAL BRAKING STYLE ? THE ?BRAKE ASSIST SYSTEM BAS? HAPPENED AGAIN WITHOUT DRIVER?S COMMAND. I WAS GOING STEADY AT 65 MPH, ABSOLUTELY NO BRAKING. THE TRAFFIC WAS LIGHT AND THE ROAD WAS DRY. THE CAR SWERVED SLIGHTLY WITH A LARGE BRAKING NOISE AND CAME DOWN TO NEAR HOLT. I COULD STEER THE CAR TO THE RIGHT SIDE EMERGENCY AREA BY TRAVELING PERHAPS 15 FEET WHILE THE BAS WAS FIRMLY IN FORCE. THIS IS COUNTER TO THE NHTSA ACTION PE07007 REFERENCE ATTRIBUTED TO MERCEDES AS THE ESP ELECTRICAL FAULTS DURATION BEING 0.3 SECONDS OR LESS. MY EXPERIENCE INDICATES THIS IS INCORRECT. IT LASTED AS LONG AS I WAS TRYING TO MOVE THE CAR. WHEN THE BAS ACTIVATED, THE ESP ALARM SIGNAL AND THE BAS/ESP LIGHT CAME ON. TURNED OFF THE ENGINE FOR A FEW MINUTES AND RESTARTED. THE BAS/EPS LIGHT CAME BACK ON BUT THE CAR BEHAVED NORMALLY OTHERWISE. DROVE BACK TO SF WITHOUT FURTHER INCIDENCE. WERE THE TRAFFIC HEAVY AND THE ROAD WERE WET AND SLIPPERY, MY MERCEDES ML320 WOULD HAVE BEEN REAR-ENDED AT HIGHWAY SPEEDS AND WOULD HAVE LOST CONTROL ON THE WET ROAD. I FIRMLY BELIEVE THAT THIS IS A SERIOUS SAFETY ISSUE MERCEDES MUST ADDRESS WITH THE DEFINITIVE SOLUTION. I AM WILLING TO AVAIL MY VEHICLE FOR FIELD TESTING. PE07007 CITES ?THE LOW COMPLAINT RATE? THROUGH 2007 LED TO CLOSING ODI INVESTIGATION. A QUICK WEBSITE RESEARCH INDICATES THERE ARE A CONSIDERABLE NUMBER OF BAS INCIDENTS POSTED SINCE 2007 ON VARIOUS PRIVATE FORUMS AND BLOGS BUT THESE DRIVERS MAY NOT HAVE REPORTED TO NHTSA. *DT
NHTSA ODI #10667458
118,714 miles · Dec 16, 2014
Electronic Stability Control (esc)Service Brakes
I WAS ON CALIF HWY1 NORTHBOUND APPROX 20 MILES SOUTH OF SF, DOING 45MPH, AROUND 1:00PM. ALL OF A SUDDEN, BRAKES WERE ACTIVATED IN A FIERCE FORCE, WHICH BROUGHT THE VEHICLE TO A COMPLETE STOP WITHIN A SECOND OR TWO TRAVELING TWO TO THREE FEET. I FELT ALL THE FOUR WHEELS WERE LOCKED FIRM. I DID NOT EVEN TOUCH THE BRAKES. MY CAR S…
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I WAS ON CALIF HWY1 NORTHBOUND APPROX 20 MILES SOUTH OF SF, DOING 45MPH, AROUND 1:00PM. ALL OF A SUDDEN, BRAKES WERE ACTIVATED IN A FIERCE FORCE, WHICH BROUGHT THE VEHICLE TO A COMPLETE STOP WITHIN A SECOND OR TWO TRAVELING TWO TO THREE FEET. I FELT ALL THE FOUR WHEELS WERE LOCKED FIRM. I DID NOT EVEN TOUCH THE BRAKES. MY CAR SWERVED SLIGHTLY BUT DID NOT LOSE CONTROL. THE ROAD WAS DRY. THERE WAS NO TRAFFIC AND NO VEHICLE BEHIND ME OR TO MY SIDES. AS I STEERED THE CAR TO THE SHOULDER AREA OF THE HIGHWAY, I NOTICED THE ESP/BAS LAMP WAS ON. I TURNED OFF THE ENGINE AND RESTARTED A MINUTE LATER. THE ESP/BAS LAMP CAME BACK ON. I WAS LUCKY THAT THE TRAFFIC WAS LIGHT AND THE ROAD WAS DRY. DROVE BACK HOME WITHOUT ANOTHER INCIDENCE. *TR
NHTSA ODI #10664733
78,500 miles · Nov 4, 2014
Electronic Stability Control (esc)Service Brakes
WHEN DRIVING ON A LOCAL STREET BETWEEN 25 AND 30 MPH, THE CAR SUDDENLY APPLIED STRONG BRAKING FORCE BY ITSELF (MY FOOT WAS NOT EVEN ON THE BRAKE PEDAL AT THAT TIME). DURING THAT INSTANCE, THE CAR ALSO WENT OUT OF STEER. FORTUNATELY, THE CAR BEHIND ME WAS ABLE TO AVOID ME WITHOUT REAR ENDED INTO MY CAR. I WAS THINKING IF THE S…
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WHEN DRIVING ON A LOCAL STREET BETWEEN 25 AND 30 MPH, THE CAR SUDDENLY APPLIED STRONG BRAKING FORCE BY ITSELF (MY FOOT WAS NOT EVEN ON THE BRAKE PEDAL AT THAT TIME). DURING THAT INSTANCE, THE CAR ALSO WENT OUT OF STEER. FORTUNATELY, THE CAR BEHIND ME WAS ABLE TO AVOID ME WITHOUT REAR ENDED INTO MY CAR. I WAS THINKING IF THE SAME THING HAPPENED ON A FREEWAY, ME AND MY FAMILY COULD HAVE GOT KILLED. *TR
NHTSA ODI #10652565
134,850 miles · Dec 15, 2013
Electronic Stability Control (esc)Service BrakesVehicle Speed Control
I AM HAVING SAFETY ISSUES WITH MY 2001 MERCEDES BENZ ML 320 WITH A ESP BAS LIGHT COMING ON AND LOCKING FRONT BRAKE CAUSING THE ABS TO COME ON AND STOP SUV. TO AVOID AN ACCIDENT AND ALMOST GETTING REAR ENDED WITH MY KIDS IN CAR. CONTACTED MERCEDES DEALER AND CANT GUARANTEE WHAT PROBLEM IS ALREADY CHANGED BRAKE LIGHT SWITCH 2 TIME…
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I AM HAVING SAFETY ISSUES WITH MY 2001 MERCEDES BENZ ML 320 WITH A ESP BAS LIGHT COMING ON AND LOCKING FRONT BRAKE CAUSING THE ABS TO COME ON AND STOP SUV. TO AVOID AN ACCIDENT AND ALMOST GETTING REAR ENDED WITH MY KIDS IN CAR. CONTACTED MERCEDES DEALER AND CANT GUARANTEE WHAT PROBLEM IS ALREADY CHANGED BRAKE LIGHT SWITCH 2 TIMES SAID IT COULD BE ABS PUMP {800} OR WHEEL SPEED SENSORS {1200} OR YAW SENSOR, IGNITION SWITCH, MAYBE EVEN COMPUTER BUT SAID THEY COULD NOT GUARANTEE TO FIX THIS PROBLEM. MERCEDES BENZ SHOULD HAVE A RECALL ON THIS ISSUE IT HAS BEEN GOING ON FOR YEARS SOME ONE IS GOING TO GET KILLED. SPOKE TO BENZ AT CORPORATE AND THEY ONLY SAY BRING IT TO THE DEALER WHO DOES NOT KNOW HOW TO FIX THIS PROBLEM. HOPE I CAN GET A ANSWER TO THIS SITUATION. *TR
NHTSA ODI #10556140
120,000 miles · Sep 3, 2013
Electronic Stability Control (esc)Service Brakes, Hydraulic
I ALMOST GOT KILLED TODAY!!! I WAS DRIVING MY MERZ ML320 WHEN I FELT THE CAR VIBRATE, HEARD A NOISE AS IF SOMETHING WAS STUCK, THE CAR SLOWED DOWN ALL BY ITSELF AND THEN FELT THE CAR PULL TO THE RIGHT VIOLENTLY AND INTO THE RIGHT LANE OF A BIG TRUCK BARELY MISSING HIM. THE DRIVER OF THAT TRUCK BLEW HIS HORN AT ME AND THERE WAS N…
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I ALMOST GOT KILLED TODAY!!! I WAS DRIVING MY MERZ ML320 WHEN I FELT THE CAR VIBRATE, HEARD A NOISE AS IF SOMETHING WAS STUCK, THE CAR SLOWED DOWN ALL BY ITSELF AND THEN FELT THE CAR PULL TO THE RIGHT VIOLENTLY AND INTO THE RIGHT LANE OF A BIG TRUCK BARELY MISSING HIM. THE DRIVER OF THAT TRUCK BLEW HIS HORN AT ME AND THERE WAS NOTHING I COULD DO. MY ABS/ESP LIGHT CAME ON ALONG WITH THE TRIANGLE BRAKE LIGHT. AT FIRST, IT SOUNDED AS IF I BLEW A RIGHT FRONT TIRE BECAUSE THAT IS HOW IT SOUNDED. I HAD NO CONTROL OF THE WHEEL OR BRAKES. THE CAR JUST SLOWED DOWN AND PULLED RIGHT. VERY DANGEROUS SITUATION AND HAD BOTH MY SONS WITH ME. THE PULLING OF THE CAR INTO THE NEXT LANE IS VERY DANGEROUS. I SAT THERE FOR 10 MINS IN SHOCK BEFORE TRYING TO START THE CAR. THE ABS/ESP LIGHT IS STILL ON. I DROVE VERY SLOWLY HOME AVOIDING THE FREEWAY. I AM CALLING MERCEDES TOMORROW. WHAT JUST HAPPENED? SOMEONE COULD BE KILLED WHEN A CAR LOCKS UP AND DRIVER HAS NO CONTROL. *JB
NHTSA ODI #10541732
108,258 miles · May 15, 2013
Electronic Stability Control (esc)Service Brakes
I WAS DRIVING STRAIGHT ON AN INTERSTATE HIGHWAY AT 70MPH WITH MY FOOT ON THE GAS PEDAL . ALL OF A SUDDEN THE VEHICLE STARTED TO TOTALLY APPLY THE BRAKES ALL BY ITSELF AND LUNGED TO A STOP . THE CAR BEHIND ME BARELY MISSED HITTING THE REAR OF MY VEHICLE . I TURNED OFF THE ENGINE AND RESTARTED AND AND WAS ABLE TO DRIVE TO THE SID…
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I WAS DRIVING STRAIGHT ON AN INTERSTATE HIGHWAY AT 70MPH WITH MY FOOT ON THE GAS PEDAL . ALL OF A SUDDEN THE VEHICLE STARTED TO TOTALLY APPLY THE BRAKES ALL BY ITSELF AND LUNGED TO A STOP . THE CAR BEHIND ME BARELY MISSED HITTING THE REAR OF MY VEHICLE . I TURNED OFF THE ENGINE AND RESTARTED AND AND WAS ABLE TO DRIVE TO THE SIDE OF THE HIGHWAY . FEARFUL TO CONTINUE DRIVING , I THEN CALLED A TOW SERVICE TO TAKE MY VEHICLE TO THE NEAREST DEALERSHIP . A FEW DAYS LATER , THEY CALLED ME AND SAID ONE OF THE SENSORS FOR THE ABS/ESP SYSTEM HAD FAILED (YAW RATE SENSOR - DTC C1120) AND CAUSED THE PROBLEM . THE REPAIR COST WOULD BE ABOUT $900.00 . I COULD NOT BELIEVE THAT A COMPONENT OF A SO CALLED SAFETY SYSTEM COULD FAIL RENDERING THE SYSTEM SO THAT IT CAN IN ITSELF CAUSE AN EXTREMELY DANGEROUS SITUATION . FORTUNATELY IN MY CASE THERE WERE NO INJURIES BUT DIFFERENT CIRCUMSTANCES COULD HAVE BEEN JUST THE OPPOSITE . THE ASE MASTER CERTIFIED TECHNITION WHO TAKES CARE OF MY CAR STATED THAT THIS WAS A KNOWN TYPE OF FAILURE (DEFECT) OF MY MODEL MERCEDES . MERCEDES BENZ REFUSED TO COVER THIS REPAIR FOR ME AND DOES NOT HAVE A SOLUTION TO PREVENT THIS FROM HAPPENNING AGAIN ON MY VEHICLE OR ANY OF THE OTHER THOUSANDS THAT THEY HAVE SOLD . WE ALL PUT FAITH IN THESE SAFETY SYSTEM THAT MERCEDES MANUFACTURES BUT ONCE THE WARRANTY EXPIRES WE ALL ARE FORCED TO LIVE WITH THE CONCEQUENCES OF DEFECTIVE DESIGNS . I WAS TOLD THAT WHEN A COMPONENT IN A SAFETY SYSTEM FAILS THE SYSTEM IS SUPPOSED TO TURN ON A WARNING LIGHT AND TURN IT SELF OFF . NOT LIKE IN MY CASE THE FAILED SENSOR CAUSED THE ABS/ESP SYSTEM TO RANDOMLY TURN ON THE BRAKES . WITH ALL OF THE CRAZY COMPUTERIZED SYSTEMS IN THE MODERN CARS I AM NOW NERVOUS ABOUT BLINDLY TRUSTING THEM WITH MY LIFE. *TR
NHTSA ODI #10512228
63,000 miles · Mar 24, 2013
Electronic Stability Control (esc)
WHILE I AM DRIVING I NOTED IT IS HARD TO ACCELERATE AND YELLOW HAZARD LIGHT CAME ON AN DI HEARD NOISE AND CAR WILL NOT MOVE. I WAITED FEW MINUTES I NOTICED THE BAS/ESP CAME ON AND I RESUME DRIVING. THIS HAPPEN SEVERAL TIMES, I NOTICED WHEN THE TEMPERATURE REACH BETWEEN 85-90, IF THE BAS;ESP WILL NOT COME ON, YOU CAN HEAR SOMET…
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WHILE I AM DRIVING I NOTED IT IS HARD TO ACCELERATE AND YELLOW HAZARD LIGHT CAME ON AN DI HEARD NOISE AND CAR WILL NOT MOVE. I WAITED FEW MINUTES I NOTICED THE BAS/ESP CAME ON AND I RESUME DRIVING. THIS HAPPEN SEVERAL TIMES, I NOTICED WHEN THE TEMPERATURE REACH BETWEEN 85-90, IF THE BAS;ESP WILL NOT COME ON, YOU CAN HEAR SOMETHING STUCK ON THE BRAKE AND IT DOES NOT MOVE. FIRST THE DEALER IN CHICAGO CHANGE IT AND IT DOES NOT HELP SO I ASK ANOTHER MECHANIC SHOP AND THEY REPLACE THE BRAKE LIGHT. I STILL HAD THE BRAKE REPLACED BY THE MERCEDES DEALER. . THE SITUATION IS MUCH BETTER THAN BEFORE BUT VERY SCARY. I COULD NOT DRIVE TOO LONG OR MAYBE DANGEROUS IN THE EXPRESSWAY. SOMEONE ON THE INTERNET TOLD IT IS THE YAW SENSOR RATE SHOULD BE REPLACED. I CHANGE MINE SUCH NEW BATTERY, GAS PUMP,.NEW RADIATOR, NEW OIL CHANGE. IF SOMEONE IN YOUR OFFICE WILL COME AND I WILL SHOW HOW MY CAR IS ACTING STRANGELY WITH THE BAS/ESP. HOW COME THE BAS/ESP MUST LIGHT ON AND YOU CAN DRIVE WITHOUT A PROBLEM. IF THE BAS/ESP WILL NOT ON, IT DOES NOT MOVE OR ACCELERATE. WHY?????? PLEASE MANDATORY THAT DIAGNOSTIC TEST BY THE DEALER SHOULD BE FREE AND CHARGE TO MERCEDES. *TR
NHTSA ODI #10504335
10 miles · Jan 10, 2013
Electronic Stability Control (esc)
BAS/ESP CAME ON AGAIN HAD A 2001 MERCEDES ML 320 ( BOUGHT THIS NEW IN 2001) 63K MILES, BAS/ESP ON ACTING STRANGELY . FIRST IT WAS REPLACED BY MERCEDES DEALER IN ILLINOIS THE BRAKE LIGHT SWITCH ON BUT THEN LATTER IT COMES AGAIN. BEFORE THE PANEL DASH BOARD BAS/ESP CAME ON, IT SEEMS THE WHEEL LOCKED AND CAR IS NOT MOVING AND LATTE…
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BAS/ESP CAME ON AGAIN HAD A 2001 MERCEDES ML 320 ( BOUGHT THIS NEW IN 2001) 63K MILES, BAS/ESP ON ACTING STRANGELY . FIRST IT WAS REPLACED BY MERCEDES DEALER IN ILLINOIS THE BRAKE LIGHT SWITCH ON BUT THEN LATTER IT COMES AGAIN. BEFORE THE PANEL DASH BOARD BAS/ESP CAME ON, IT SEEMS THE WHEEL LOCKED AND CAR IS NOT MOVING AND LATTER ON IT BAS/EXP LIGHT ON SO IT IS OKAY TO DRIVE THE CAR. WHAT I DID I WENT TO THE LOCAL SHOP AND THEY REPLACED AGAIN THE NEW BRAKE LIGHT SWITCH ON (REPLACED BY MERCEDES DEALER IN 10/10/12) INTO NEW ONE ORIGINAL PARTS. I NOTICED SOMETIMES THAT THE BAS/ESP IS ON AFTER 90 TEMPERATURE AND STAY ON UNTIL YOU SHUT DOWN THE CAR ENGINE. SOMEONE TOLD THAT IN THE MB FORUM THAT YAW RATE SENSOR IS THE ONE THAT CAUSE THE PROBLEM OF THE BAS/ESP ON. I WONDER HOW NATIONAL TRANSPORTATION SAFETY BOARD IS DOING THIS.YOU SHOULD RECALL THAT ASIDE REPLACEMENT OF BAS/ESP, YAW RATE SENSOR,ESP MODULE AND ABS RELAY SHOULD BE RECALL ALSO AND REPLACE NO CHARGE TO THE DRIVER PLUS FREE DIAGNOSTIC. I BRING TO MERCEDES DEALER IN CHICAGO IN 0CT. 2012 TO RECALL BAS/ESP, YET AFTER A DAY IT CAME ON AND REPEATED AGAIN EVEN TODAY. THIS IS VERY DANGEROUS ESPECIALLY WHEN YOU ARE DRIVING IN THE EXPRESSWAY. NHTSA SHOULD DO THE RECALL SOONER BEFORE IT IS TOO LATE. *TR
NHTSA ODI #10492165
215,000 miles · Oct 2, 2012
Electronic Stability Control (esc)Service Brakes, HydraulicVehicle Speed Control
WHILE DRIVING ON FREEWAY IN MODERATE TRAFFIC THE CAR SUDDENLY WITHOUT ANY WARNING VIOLENTLY APPLIED UNEVEN POWER TO DIFFERENT WHEELS, BRAKE AND SPED UP. ORIGINALLY I THOUGHT WE WERE HAVING AN EARTHQUAKE AS I WAS TRYING TO REGAIN CONTROL OVER CAR. AFTER ABOUT 15 SECONDS AS I SLOWED CAR RESUMED NORMAL OPERATION. ABOUT 10 MILES LA…
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WHILE DRIVING ON FREEWAY IN MODERATE TRAFFIC THE CAR SUDDENLY WITHOUT ANY WARNING VIOLENTLY APPLIED UNEVEN POWER TO DIFFERENT WHEELS, BRAKE AND SPED UP. ORIGINALLY I THOUGHT WE WERE HAVING AN EARTHQUAKE AS I WAS TRYING TO REGAIN CONTROL OVER CAR. AFTER ABOUT 15 SECONDS AS I SLOWED CAR RESUMED NORMAL OPERATION. ABOUT 10 MILES LATER THE ACTION REPEATED MAKING ME FEAR A CRASH OR ROLL OVER AS I WAS FIGHTING TO REGAIN CONTROL AND EXIT FREEWAY. LUCKILY I WAS ABLE TO EXIT AND GAIN CONTROL. ENDED UP HAVING CAR TOWED 175 MILES HOME. MECHANIC AT DEALERSHIP NOW SAYS IT WAS A DEFECTIVE YAW SENSOR DESIGNED TO WORK IN CONJUNCTION WITH THE ESP TO PREVENT A ROLL OVER. HOWEVER THE DEFECTIVE SENSOR EASILY COULD HAVE CAUSED A ROLL OVER OR A CRASH WITH A LESS EXPERIENCED AND PHYSICALLY STRONG DRIVER. INDEED, HAD MY WIFE BEEN DRIVING I DO NOT KNOW WHETHER SHE COULD HAVE CONTROLLED THE VEHICLE. HAD THERE BEEN ONE OF THE MANY 18 WHEELERS IMMEDIATELY NEXT TO ME I DO NOT KNOW WHETHER I COULD HAVE AVOIDED A COLLISION. AFTER THE FACT IN REVIEW ON GOOGLE I NOTED MANY VERY SIMILAR COMPLAINTS FOR THE SAME 2001 MBZ ML320. I BELIEVE THERE SHOULD BE A RECALL BEFORE THERE IS DEATH OR SERIOUS INJURY. *TR
NHTSA ODI #10478371
182,000 miles · Jul 19, 2012
Electrical SystemElectronic Stability ControlElectronic Stability Control (esc)
ON OR ABOUT MAY 14, 2012, WHILE I WAS DRIVING ON THE FREEWAY AT FULL FREEWAY SPEED, THE VEHICLE SUDDENLY SELF-INITIATED A CONTINUOUS BRAKE ACTIVATION WITHOUT ME PRESSING ON THE BRAKES OR TAKING ANY OTHER ACTION. THE VEHICLE'S SUDDEN, UNEXPECTED AND SUSTAINED BRAKING ACTION RESULTED IN A NEAR-COLLISION WITH A SEMI-TRUCK TRAVELIN…
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ON OR ABOUT MAY 14, 2012, WHILE I WAS DRIVING ON THE FREEWAY AT FULL FREEWAY SPEED, THE VEHICLE SUDDENLY SELF-INITIATED A CONTINUOUS BRAKE ACTIVATION WITHOUT ME PRESSING ON THE BRAKES OR TAKING ANY OTHER ACTION. THE VEHICLE'S SUDDEN, UNEXPECTED AND SUSTAINED BRAKING ACTION RESULTED IN A NEAR-COLLISION WITH A SEMI-TRUCK TRAVELING BEHIND ME WHICH THE TRUCK-DRIVER WAS FORTUNATELY JUST ABLE TO PREVENT. I STEERED THE VEHICLE TO THE FREEWAY SHOULDER AS THE UN-COMMANDED BRAKING ACTION BROUGHT THE VEHICLE TO A STOP. THE INCIDENT WAS EXTREMELY FRIGHTENING FOR ME, AND IT WAS ONLY SHEER LUCK THAT I WAS NOT SERIOUSLY INJURED OR KILLED. AFTER I HAD THE VEHICLE TOWED TO MERCEDES BENZ OF LAGUNA NIGUEL, THEIR SERVICE DEPARTMENT DETERMINED THAT THE ELECTRONIC STABILITY PROGRAM (?ESP?) CONTROL MODULE AND YAW RATE SENSOR HAD FAILED AND NEED TO BE REPLACED. THE VEHICLE IS PRESENTLY IN AN INOPERABLE CONDITION. REVIEWING THE NHTSA WEBSITE, THIS APPEARS TO BE RELATED TO NHTSA (CAMPAIGN # PE07007). *TR
NHTSA ODI #10466598
NHTSA investigations
3PE10050 · Brake Lamp Switch Failure.
Opened Dec 21, 2010 · Closed May 4, 2011
Status: closed (inferred from source dates) · Exterior Lighting:brake Lights:switch; Service Brakes, Hydraulic; Vehicle Speed Control; Vehicle Speed Control:cruise Control
ODI opened the investigation based on reports that the subject vehicle brake lamp switch (switch) failure caused 1) inoperative brake lamps (stay on or fail to illuminate), and/or 2) shift interlock failure (shifter locked in park), and/or 3) the cruise control to fail to cancel with brake application.Consumers also reported the illumination of a warning lamp on the instrument panel.The switch contains three sets of electrical contacts and a (normally extended) spring loaded plunger that actuates the contacts as it moves.As installed in the vehicle, the plunger contacts the brake pedal arm and is pushed into the switch; as the driver applies the pedal the plunger extends.One set of contacts (BLS) operates the stop lamps, a second set (EWM) controls the shift interlock system, and a third set (BS) is used by an on-board diagnostic (OBD) system to monitor switch operation.The cruise control monitors the BLS signal to determine when the brake is applied, the primary way the system is disabled when set.The relative timing of contact actuation in response to plunger movement allows the OBD system to detect a switch fault.When a fault is detected a malfunction indication lamp (MIL) is illuminated (driver alert), a diagnostic trouble code (DTC) is stored (for the service technician), and cruise control operation is inhibited (as a failsafe).In its response to ODI's January 2011 information request letter, MB explained its assessment of switch failures which was based primarily on evaluation of field return failures.MB identified both 1) electrical contact and 2) mechanical switch failure mechanisms.According to MB's analysis, electrical contact failure is the predominate failure type and the failure consequence depends on which contact fails.For instance MB claims that BLS contact failures are momentary in nature and do not affect brake light operation but are nonetheless detected by the OBD system, resulting in a DTC and subsequent replacement.Electrical contact failures of the BS and EWM contacts result in a DTC also, and EWM contact failures result in the shifter being stuck in the park (which can be overridden by the consumer).Accordingly MB maintains that electrical contact failures of the switch have no safety consequence since the brake lamps remain operational and the cruise control is always disabled.MB determined that mechanical failures of the switch, which are rare in their assessment, can result from internal wear and/or increased switch operating temperatures.High temperatures occur due to overheating of the BLS contacts and can cause the internal plastic components to melt.In one scenario overheated BLS contacts may melt to the extended plunger and are damaged when the brake pedal is released resulting in the brake lights staying on.In another scenario the increased temperatures and/or internal wear can cause the plunger to stick in the fully depressed position.In this case the cruise may not cancel when the brake is applied and the driver may have to use high brake pedal forces or other means (shifting to neutral or using the cruise master switch) to disengage the cruise.Additionally the vacuum assist can be depleted if the driver pumps the brakes resulting in reduced braking effectiveness and even higher pedal forces.In its March 31, 2011 defect notification, MB stated that to remediate the potential need for excessive brake force it would conduct a safety recall (11V-208) to replace the switch with a more robustly designed component.The recall includes 136,751 model year 2000 - 2002 M-Class and model year 2000 - 2004 M-Class AMG vehicles.Owner notification letters will be mailed
Additional source detail variants (4)
Exterior Lighting:brake Lights:switch
ODI opened the investigation based on reports that the subject vehicle brake lamp switch (switch) failure caused 1) inoperative brake lamps (stay on or fail to illuminate), and/or 2) shift interlock failure (shifter locked in park), and/or 3) the cruise control to fail to cancel with brake application.Consumers also reported the illumination of a warning lamp on the instrument panel.The switch contains three sets of electrical contacts and a (normally extended) spring loaded plunger that actuates the contacts as it moves.As installed in the vehicle, the plunger contacts the brake pedal arm and is pushed into the switch; as the driver applies the pedal the plunger extends.One set of contacts (BLS) operates the stop lamps, a second set (EWM) controls the shift interlock system, and a third set (BS) is used by an on-board diagnostic (OBD) system to monitor switch operation.The cruise control monitors the BLS signal to determine when the brake is applied, the primary way the system is disabled when set.The relative timing of contact actuation in response to plunger movement allows the OBD system to detect a switch fault.When a fault is detected a malfunction indication lamp (MIL) is illuminated (driver alert), a diagnostic trouble code (DTC) is stored (for the service technician), and cruise control operation is inhibited (as a failsafe).In its response to ODI's January 2011 information request letter, MB explained its assessment of switch failures which was based primarily on evaluation of field return failures.MB identified both 1) electrical contact and 2) mechanical switch failure mechanisms.According to MB's analysis, electrical contact failure is the predominate failure type and the failure consequence depends on which contact fails.For instance MB claims that BLS contact failures are momentary in nature and do not affect brake light operation but are nonetheless detected by the OBD system, resulting in a DTC and subsequent replacement.Electrical contact failures of the BS and EWM contacts result in a DTC also, and EWM contact failures result in the shifter being stuck in the park (which can be overridden by the consumer).Accordingly MB maintains that electrical contact failures of the switch have no safety consequence since the brake lamps remain operational and the cruise control is always disabled.MB determined that mechanical failures of the switch, which are rare in their assessment, can result from internal wear and/or increased switch operating temperatures.High temperatures occur due to overheating of the BLS contacts and can cause the internal plastic components to melt.In one scenario overheated BLS contacts may melt to the extended plunger and are damaged when the brake pedal is released resulting in the brake lights staying on.In another scenario the increased temperatures and/or internal wear can cause the plunger to stick in the fully depressed position.In this case the cruise may not cancel when the brake is applied and the driver may have to use high brake pedal forces or other means (shifting to neutral or using the cruise master switch) to disengage the cruise.Additionally the vacuum assist can be depleted if the driver pumps the brakes resulting in reduced braking effectiveness and even higher pedal forces.In its March 31, 2011 defect notification, MB stated that to remediate the potential need for excessive brake force it would conduct a safety recall (11V-208) to replace the switch with a more robustly designed component.The recall includes 136,751 model year 2000 - 2002 M-Class and model year 2000 - 2004 M-Class AMG vehicles.Owner notification letters will be mailed
Service Brakes, Hydraulic
ODI opened the investigation based on reports that the subject vehicle brake lamp switch (switch) failure caused 1) inoperative brake lamps (stay on or fail to illuminate), and/or 2) shift interlock failure (shifter locked in park), and/or 3) the cruise control to fail to cancel with brake application.Consumers also reported the illumination of a warning lamp on the instrument panel.The switch contains three sets of electrical contacts and a (normally extended) spring loaded plunger that actuates the contacts as it moves.As installed in the vehicle, the plunger contacts the brake pedal arm and is pushed into the switch; as the driver applies the pedal the plunger extends.One set of contacts (BLS) operates the stop lamps, a second set (EWM) controls the shift interlock system, and a third set (BS) is used by an on-board diagnostic (OBD) system to monitor switch operation.The cruise control monitors the BLS signal to determine when the brake is applied, the primary way the system is disabled when set.The relative timing of contact actuation in response to plunger movement allows the OBD system to detect a switch fault.When a fault is detected a malfunction indication lamp (MIL) is illuminated (driver alert), a diagnostic trouble code (DTC) is stored (for the service technician), and cruise control operation is inhibited (as a failsafe).In its response to ODI's January 2011 information request letter, MB explained its assessment of switch failures which was based primarily on evaluation of field return failures.MB identified both 1) electrical contact and 2) mechanical switch failure mechanisms.According to MB's analysis, electrical contact failure is the predominate failure type and the failure consequence depends on which contact fails.For instance MB claims that BLS contact failures are momentary in nature and do not affect brake light operation but are nonetheless detected by the OBD system, resulting in a DTC and subsequent replacement.Electrical contact failures of the BS and EWM contacts result in a DTC also, and EWM contact failures result in the shifter being stuck in the park (which can be overridden by the consumer).Accordingly MB maintains that electrical contact failures of the switch have no safety consequence since the brake lamps remain operational and the cruise control is always disabled.MB determined that mechanical failures of the switch, which are rare in their assessment, can result from internal wear and/or increased switch operating temperatures.High temperatures occur due to overheating of the BLS contacts and can cause the internal plastic components to melt.In one scenario overheated BLS contacts may melt to the extended plunger and are damaged when the brake pedal is released resulting in the brake lights staying on.In another scenario the increased temperatures and/or internal wear can cause the plunger to stick in the fully depressed position.In this case the cruise may not cancel when the brake is applied and the driver may have to use high brake pedal forces or other means (shifting to neutral or using the cruise master switch) to disengage the cruise.Additionally the vacuum assist can be depleted if the driver pumps the brakes resulting in reduced braking effectiveness and even higher pedal forces.In its March 31, 2011 defect notification, MB stated that to remediate the potential need for excessive brake force it would conduct a safety recall (11V-208) to replace the switch with a more robustly designed component.The recall includes 136,751 model year 2000 - 2002 M-Class and model year 2000 - 2004 M-Class AMG vehicles.Owner notification letters will be mailed
Vehicle Speed Control:cruise Control
ODI opened the investigation based on reports that the subject vehicle brake lamp switch (switch) failure caused 1) inoperative brake lamps (stay on or fail to illuminate), and/or 2) shift interlock failure (shifter locked in park), and/or 3) the cruise control to fail to cancel with brake application.Consumers also reported the illumination of a warning lamp on the instrument panel.The switch contains three sets of electrical contacts and a (normally extended) spring loaded plunger that actuates the contacts as it moves.As installed in the vehicle, the plunger contacts the brake pedal arm and is pushed into the switch; as the driver applies the pedal the plunger extends.One set of contacts (BLS) operates the stop lamps, a second set (EWM) controls the shift interlock system, and a third set (BS) is used by an on-board diagnostic (OBD) system to monitor switch operation.The cruise control monitors the BLS signal to determine when the brake is applied, the primary way the system is disabled when set.The relative timing of contact actuation in response to plunger movement allows the OBD system to detect a switch fault.When a fault is detected a malfunction indication lamp (MIL) is illuminated (driver alert), a diagnostic trouble code (DTC) is stored (for the service technician), and cruise control operation is inhibited (as a failsafe).In its response to ODI's January 2011 information request letter, MB explained its assessment of switch failures which was based primarily on evaluation of field return failures.MB identified both 1) electrical contact and 2) mechanical switch failure mechanisms.According to MB's analysis, electrical contact failure is the predominate failure type and the failure consequence depends on which contact fails.For instance MB claims that BLS contact failures are momentary in nature and do not affect brake light operation but are nonetheless detected by the OBD system, resulting in a DTC and subsequent replacement.Electrical contact failures of the BS and EWM contacts result in a DTC also, and EWM contact failures result in the shifter being stuck in the park (which can be overridden by the consumer).Accordingly MB maintains that electrical contact failures of the switch have no safety consequence since the brake lamps remain operational and the cruise control is always disabled.MB determined that mechanical failures of the switch, which are rare in their assessment, can result from internal wear and/or increased switch operating temperatures.High temperatures occur due to overheating of the BLS contacts and can cause the internal plastic components to melt.In one scenario overheated BLS contacts may melt to the extended plunger and are damaged when the brake pedal is released resulting in the brake lights staying on.In another scenario the increased temperatures and/or internal wear can cause the plunger to stick in the fully depressed position.In this case the cruise may not cancel when the brake is applied and the driver may have to use high brake pedal forces or other means (shifting to neutral or using the cruise master switch) to disengage the cruise.Additionally the vacuum assist can be depleted if the driver pumps the brakes resulting in reduced braking effectiveness and even higher pedal forces.In its March 31, 2011 defect notification, MB stated that to remediate the potential need for excessive brake force it would conduct a safety recall (11V-208) to replace the switch with a more robustly designed component.The recall includes 136,751 model year 2000 - 2002 M-Class and model year 2000 - 2004 M-Class AMG vehicles.Owner notification letters will be mailed
Vehicle Speed Control
ODI opened the investigation based on reports that the subject vehicle brake lamp switch (switch) failure caused 1) inoperative brake lamps (stay on or fail to illuminate), and/or 2) shift interlock failure (shifter locked in park), and/or 3) the cruise control to fail to cancel with brake application.Consumers also reported the illumination of a warning lamp on the instrument panel.The switch contains three sets of electrical contacts and a (normally extended) spring loaded plunger that actuates the contacts as it moves.As installed in the vehicle, the plunger contacts the brake pedal arm and is pushed into the switch; as the driver applies the pedal the plunger extends.One set of contacts (BLS) operates the stop lamps, a second set (EWM) controls the shift interlock system, and a third set (BS) is used by an on-board diagnostic (OBD) system to monitor switch operation.The cruise control monitors the BLS signal to determine when the brake is applied, the primary way the system is disabled when set.The relative timing of contact actuation in response to plunger movement allows the OBD system to detect a switch fault.When a fault is detected a malfunction indication lamp (MIL) is illuminated (driver alert), a diagnostic trouble code (DTC) is stored (for the service technician), and cruise control operation is inhibited (as a failsafe).In its response to ODI's January 2011 information request letter, MB explained its assessment of switch failures which was based primarily on evaluation of field return failures.MB identified both 1) electrical contact and 2) mechanical switch failure mechanisms.According to MB's analysis, electrical contact failure is the predominate failure type and the failure consequence depends on which contact fails.For instance MB claims that BLS contact failures are momentary in nature and do not affect brake light operation but are nonetheless detected by the OBD system, resulting in a DTC and subsequent replacement.Electrical contact failures of the BS and EWM contacts result in a DTC also, and EWM contact failures result in the shifter being stuck in the park (which can be overridden by the consumer).Accordingly MB maintains that electrical contact failures of the switch have no safety consequence since the brake lamps remain operational and the cruise control is always disabled.MB determined that mechanical failures of the switch, which are rare in their assessment, can result from internal wear and/or increased switch operating temperatures.High temperatures occur due to overheating of the BLS contacts and can cause the internal plastic components to melt.In one scenario overheated BLS contacts may melt to the extended plunger and are damaged when the brake pedal is released resulting in the brake lights staying on.In another scenario the increased temperatures and/or internal wear can cause the plunger to stick in the fully depressed position.In this case the cruise may not cancel when the brake is applied and the driver may have to use high brake pedal forces or other means (shifting to neutral or using the cruise master switch) to disengage the cruise.Additionally the vacuum assist can be depleted if the driver pumps the brakes resulting in reduced braking effectiveness and even higher pedal forces.In its March 31, 2011 defect notification, MB stated that to remediate the potential need for excessive brake force it would conduct a safety recall (11V-208) to replace the switch with a more robustly designed component.The recall includes 136,751 model year 2000 - 2002 M-Class and model year 2000 - 2004 M-Class AMG vehicles.Owner notification letters will be mailed
PE07007 · Electronic Stability Control Malfunction
Opened Feb 1, 2007 · Closed Jul 11, 2007
Status: closed (inferred from source dates) · Electronic Stability Control:automatic (asc)
ODI OPENED PE07-007 AFTER RECEIVING 4 COMPLAINTS WITHIN A 6 WEEK PERIOD ALLEGING INCIDENTS OF UNCOMMANDED BRAKE APPLICATION IN MODEL YEAR (MY) 2000 THROUGH 2001 MERCEDES M CLASS SPORT UTILITY VEHICLES.INFORMATION CONTAINED IN THE REPORTS OR GATHERED IN SUBSEQUENT CONSUMER INTERVIEWS INDICATED THAT THE INCIDENTS WERE CAUSED BY FAULTS IN THE ELECTRONIC STABILITY PROGRAM (ESP) SYSTEM WHICH WERE REPAIRED BY REPLACING THE YAW RATE SENSORS.ALTHOUGH THE SAME YAW RATE SENSOR IS USED IN APPROXIMATELY 800,000 OTHER MERCEDES M-CLASS, C-CLASS AND SLK MODELS, TO DATE THERE HAS BEEN ONLY ONE RELATED COMPLAINT TO ODI IN THOSE VEHICLES. DURING THIS INVESTIGATION MERCEDES BENZ PROVIDED ODI WITH 327 COMPLAINTS RELATED TO THE ESP SYSTEM IN THE MY 2000 THROUGH 2001 M CLASS VEHICLES.SEVEN OF THE COMPLAINTS SUBMITTED BY MERCEDES ALLEGED INCIDENTS OF UNCOMMANDED BRAKE ACTIVATION WHILE DRIVING, WITH TWO OF THESE INVOLVING VEHICLES IDENTIFIED IN THE ODI COMPLAINTS.NONE OF THE INCIDENTS RESULTED IN CRASH OR INJURY.HOWEVER, THE OWNERS DID EXPRESS SAFETY CONCERNS DUE TO THE SUDDEN, UNEXPECTED CHANGE IN VEHICLE SPEED AND DIRECTION. ON MAY 10, 2007 MERCEDES BENZ MET WITH NHTSA TO PROVIDE A TECHNICAL PRESENTATION AND CONDUCT A DRIVING DEMONSTRATION OF THE ESP SYSTEM PERFORMANCE WITH SIMULATED ELECTRICAL FAULTS IN THE YAW RATE SENSOR.MERCEDES SHOWED THAT THE ESP SYSTEM IS PROGRAMMED TO DIAGNOSE ELECTRICAL FAULTS AND THAT BRAKE APPLICATIONS RESULTING FROM YAW RATE SENSOR ELECTRICAL FAULTS ARE VERY SHORT IN DURATION (0.3 SECONDS OR LESS) AND DO NOT AFFECT VEHICLE CONTROL OR STABILITY. NINE OF THE CONSUMER COMPLAINTS TO ODI AND MERCEDES ALLEGED BRAKE ACTIVATIONS LONGER THAN 0.3 SECONDS, WITH SEVERAL ALLEGING THAT THE INCIDENT LASTED UNTIL THE VEHICLE CAME TO A STOP.A COMPLAINT VEHICLE THAT ALLEGED MULTIPLE INCIDENTS WAS EVALUATED BY ODI AT THE VEHICLE RESEARCH AND TEST CENTER (VRTC) IN EAST LIBERTY, OHIO.VRTC WAS UNABLE TO DUPLICATE THE CONDITION.DUE TO THE LOW COMPLAINT RATE AND ONLY ONE NEW COMPLAINT TO ODI OR MERCEDES SINCE JANUARY 2007, THIS INVESTIGATION HAS BEEN CLOSED.ODI WILL CONTINUE TO MONITOR COMPLAINTS IN THE SUBJECT VEHICLES AND OTHER MERCEDES PRODUCTS USING THE SAME YAW RATE SENSOR AND MERCEDES WILL PROVIDE UPDATES ON FIELD EXPERIENCE (COMPLAINTS, FIELD REPORTS AND WARRANTY CLAIMS) THROUGH THE END OF 2007.
PE03006 · Power Steering Hose Assembly Leakage
Opened Feb 13, 2003 · Closed Apr 4, 2003
Status: closed (inferred from source dates) · Steering:hydraulic Power Assist:hose, Piping, And Connections; Steering:hydraulic Power Assist:power Steering Fluid
THE HOSE CLAMP USED TO SECURE THE POWER STEERING FLUID COOLING HOSE TO THE STEERING FLUID COOLER MAY NOT PROVIDE SUFFICIENT CLAMPING FORCE FOR THE CONNECTION.THE LOSS OF POWER STEERING FLUID MAY RESULT IN GRADUAL REDUCTION IN POWER STEERING ASSIST (I.E., INCREASED STEERING EFFORT) OVER TIME, WITH POTENTIAL DAMAGE TO THE POWER STEERING PUMP. THERE HAVE ALSO BEEN A FEW INCIDENTS OF HOSE SEPARATION FROM THE FITTING, THAT HAVE RESULTED IN MORE RAPID REDUCTIONS OF POWER STEERING.TESTING CONDUCTED BY MERCEDES-BENZ INDICATES THAT THE LEAKED FLUID IS NOT LIKELY TO BE EXPOSED TO HOT ENGINE COMPONENTS.THERE ARE NO KNOWN ALLEGATIONS THAT THE DEFECT CONDITION HAS CAUSED A VEHICLE FIRE. MERCEDES-BENZ WILL CONDUCT A VOLUNTARY RECALL CAMPAIGN FOR THE SUBJECT M-CLASS VEHICLES.MERCEDES-BENZ WILL INSTALL A NEW HOSE CLAMP ON THE POWER STEERING HOSE TO THE POWER STEERING COOLER OF THE SUBJECT VEHICLES.DURING CLAMP REPLACEMENT, THE POWER STEERING COOLING HOSE WILL BE INSPECTED AND REPLACED AS NECESSARY.
Additional source detail variants (2)
Steering:hydraulic Power Assist:hose, Piping, And Connections
THE HOSE CLAMP USED TO SECURE THE POWER STEERING FLUID COOLING HOSE TO THE STEERING FLUID COOLER MAY NOT PROVIDE SUFFICIENT CLAMPING FORCE FOR THE CONNECTION.THE LOSS OF POWER STEERING FLUID MAY RESULT IN GRADUAL REDUCTION IN POWER STEERING ASSIST (I.E., INCREASED STEERING EFFORT) OVER TIME, WITH POTENTIAL DAMAGE TO THE POWER STEERING PUMP. THERE HAVE ALSO BEEN A FEW INCIDENTS OF HOSE SEPARATION FROM THE FITTING, THAT HAVE RESULTED IN MORE RAPID REDUCTIONS OF POWER STEERING.TESTING CONDUCTED BY MERCEDES-BENZ INDICATES THAT THE LEAKED FLUID IS NOT LIKELY TO BE EXPOSED TO HOT ENGINE COMPONENTS.THERE ARE NO KNOWN ALLEGATIONS THAT THE DEFECT CONDITION HAS CAUSED A VEHICLE FIRE. MERCEDES-BENZ WILL CONDUCT A VOLUNTARY RECALL CAMPAIGN FOR THE SUBJECT M-CLASS VEHICLES.MERCEDES-BENZ WILL INSTALL A NEW HOSE CLAMP ON THE POWER STEERING HOSE TO THE POWER STEERING COOLER OF THE SUBJECT VEHICLES.DURING CLAMP REPLACEMENT, THE POWER STEERING COOLING HOSE WILL BE INSPECTED AND REPLACED AS NECESSARY.
Steering:hydraulic Power Assist:power Steering Fluid
THE HOSE CLAMP USED TO SECURE THE POWER STEERING FLUID COOLING HOSE TO THE STEERING FLUID COOLER MAY NOT PROVIDE SUFFICIENT CLAMPING FORCE FOR THE CONNECTION.THE LOSS OF POWER STEERING FLUID MAY RESULT IN GRADUAL REDUCTION IN POWER STEERING ASSIST (I.E., INCREASED STEERING EFFORT) OVER TIME, WITH POTENTIAL DAMAGE TO THE POWER STEERING PUMP. THERE HAVE ALSO BEEN A FEW INCIDENTS OF HOSE SEPARATION FROM THE FITTING, THAT HAVE RESULTED IN MORE RAPID REDUCTIONS OF POWER STEERING.TESTING CONDUCTED BY MERCEDES-BENZ INDICATES THAT THE LEAKED FLUID IS NOT LIKELY TO BE EXPOSED TO HOT ENGINE COMPONENTS.THERE ARE NO KNOWN ALLEGATIONS THAT THE DEFECT CONDITION HAS CAUSED A VEHICLE FIRE. MERCEDES-BENZ WILL CONDUCT A VOLUNTARY RECALL CAMPAIGN FOR THE SUBJECT M-CLASS VEHICLES.MERCEDES-BENZ WILL INSTALL A NEW HOSE CLAMP ON THE POWER STEERING HOSE TO THE POWER STEERING COOLER OF THE SUBJECT VEHICLES.DURING CLAMP REPLACEMENT, THE POWER STEERING COOLING HOSE WILL BE INSPECTED AND REPLACED AS NECESSARY.
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