NHTSA owner reports · September 18, 2026 snapshot.
What owners actually said
166 reports169,780 miles · Jul 12, 2018
Electrical SystemFire
TAKATA RECALL I JUST BOUGHT A 2000 MERCEDES ML 320. MY AC STOPPED WORKING AND TOOK IT TO A MERCEDES CERTIFIED MECHANIC. TOLD ME IT WAS A PRESSURE SENSOR. HE THEN CALLED ME BACK AND TOLD ME THAT THE WIRING HARNESS HAD FALLEN APART AND ALL WIRES WERE TOUCHING EACH OTHER MAKING SHORTS THRU OUT THE CAR. HE TOLD ME THAT THE SHORT…
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TAKATA RECALL I JUST BOUGHT A 2000 MERCEDES ML 320. MY AC STOPPED WORKING AND TOOK IT TO A MERCEDES CERTIFIED MECHANIC. TOLD ME IT WAS A PRESSURE SENSOR. HE THEN CALLED ME BACK AND TOLD ME THAT THE WIRING HARNESS HAD FALLEN APART AND ALL WIRES WERE TOUCHING EACH OTHER MAKING SHORTS THRU OUT THE CAR. HE TOLD ME THAT THE SHORTS HAD FRIED MY COMPUTER AND THE ONLY WAY TO FIX ALL THIS WAS TO REPLACE THE WIRING HARNESS. AT ALMOST $2000.00 FOR THE REPAIR IT SEEMS THAT MERCEDES INTENTIONALLY DID THIS TO MAKE MONEY. THEY SHOULD BE HELD ACCOUNTABLE TO REPAIR THIS ISSUE AS THEY DID IT SO THE WIRING HARNESS WOULD BIO DEGRADE WHEN THE CAR WAS JUNKED. NOT A GOOD PRACTICE TO SELL CARS IN THE UNITED STATES.
NHTSA ODI #11111058
Mileage unknown · Jul 20, 2017
Engine And Engine CoolingLatches/locks/linkages
2000 MERCEDES BENZ ML320. CONSUMER WRITES IN REGARDS TO CRACKED EXHAUST SYSTEM AND CRACKED CATALYTIC CONVERTER. *LD THE CONSUMER STATED THE VEHICLE WAS VISUALLY INSPECTED AND DOCUMENTED THAT RECALL REPAIR WAS COMPLETED. NO REPAIRS WERE MADE. *JS
NHTSA ODI #10959429
155,000 miles · Jun 28, 2016
Exterior LightingStructureWheels
ON APRIL 21, 2016 WE PURCHASED TWO USED TIRES FROM A LOCAL COMPANY CALLED TIRE TRACKS FOR OUR SON'S CAR. THEY WERE GENERAL TIRES CALLED "GRABBERS", P255/65R16. THE REAR TIRES WERE MOVED TO THE FRONT AND THE TIRES THAT WE PURCHASED WERE PUT ON THE REAR OF THE VEHICLE. A "COURTESY INSPECTION" WAS PERFORMED. ON MAY 12, 2016 OUR…
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ON APRIL 21, 2016 WE PURCHASED TWO USED TIRES FROM A LOCAL COMPANY CALLED TIRE TRACKS FOR OUR SON'S CAR. THEY WERE GENERAL TIRES CALLED "GRABBERS", P255/65R16. THE REAR TIRES WERE MOVED TO THE FRONT AND THE TIRES THAT WE PURCHASED WERE PUT ON THE REAR OF THE VEHICLE. A "COURTESY INSPECTION" WAS PERFORMED. ON MAY 12, 2016 OUR SON HAD A LEFT REAR BLOWOUT AS HE WAS EXITING I-49 SOUTH. HE WAS NOT INJURED BUT THERE WAS DAMAGE TO HIS CAR WHERE THE STEEL BELT HAD REPEATEDLY HIT HIS CAR UNTIL HE COULD PULL OVER SAFELY. THE COMPANY REPLACED THE TIRE. THEN ON JUNE 15, 2016 I WAS FOLLOWING MY SON HOME FROM LITTLE ROCK. WE WERE TRAVELING NORTH ON I-49. HE WAS IN THE LEFT LANE TRAVELING 70-75 MPH AND HAD ANOTHER BLOWOUT WITH THE RIGHT REAR TIRE. THANKFULLY, HE WAS NOT INJURED AND WAS ABLE TO SAFELY PULL ONTO THE SHOULDER. DAMAGE TO HIS CAR WAS MORE SEVERE. HIS RIGHT REAR TAIL LIGHT WAS BUSTED AS WELL AS HIS BUMPER. AGAIN, THE RIGHT REAR FENDER SUSTAINED DAMAGE BECAUSE OF THE STEEL BELT REPEATEDLY HITTING HIS CAR. THE COMPANY
NHTSA ODI #10877132
8 miles · Apr 29, 2016
Service Brakes
SUDDEN AND COMPLETE FAILURE OF FRONT BRAKES DUE TO BREAKAGE OF FRONT STEEL BRAKE LINES, LOST ALL FLUID, FORTUNATELY HAPPENED IN THE PARKING LOT AND NOT DURING A RECENT TRIP TO MASS AND NEW YORK CITY
NHTSA ODI #10862273
200,000 miles · Mar 1, 2016
Electrical SystemExterior LightingService Brakes
TL* THE CONTACT OWNS A 2000 MERCEDES-BENZ ML320. WHEN THE CONTACT ATTEMPTED TO ROLL DOWN BOTH PASSENGER SIDE WINDOWS, THEY FAILED TO ROLL DOWN. THE HEADLIGHTS AND INSTRUMENT PANEL LIGHTS FAILED TO ILLUMINATE. THE ABS, BRAKE FAILURE SWITCH, AND ESP WARNING LIGHTS ILLUMINATED. WHEN USING THE POWER STEERING TO ATTEMPT TO TURN THE V…
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TL* THE CONTACT OWNS A 2000 MERCEDES-BENZ ML320. WHEN THE CONTACT ATTEMPTED TO ROLL DOWN BOTH PASSENGER SIDE WINDOWS, THEY FAILED TO ROLL DOWN. THE HEADLIGHTS AND INSTRUMENT PANEL LIGHTS FAILED TO ILLUMINATE. THE ABS, BRAKE FAILURE SWITCH, AND ESP WARNING LIGHTS ILLUMINATED. WHEN USING THE POWER STEERING TO ATTEMPT TO TURN THE VEHICLE, THE WARNING LIGHT ILLUMINATED, INDICATING A MALFUNCTION OF THE POWER STEERING. THE VEHICLE HESITATED BEFORE COMPLETING THE TURN. THE VEHICLE WAS NOT DIAGNOSED NOR REPAIRED. THE APPROXIMATE FAILURE MILEAGE WAS 200,000.
NHTSA ODI #10839162
160,020 miles · Jul 28, 2015
Electronic Stability Control (esc)Service BrakesVehicle Speed Control
WAS DRIVING TRUCK AT HIGHWAY, WHEN BRAKES ACTIVATED BY ITSELF, ABS, TRACTION LIGHT, BRAKE LAMP AND HAZARDS FLASHED. HAD TO IMMEDIATELY MOVE TO SIDE OF ROAD, WHILE BRAKES WHERE ACTIVATING. FELT AS IF ABS WAS ACTIVATING AS IF I WAS SLIDING ON AND ICY ROAD. HAD TO HAVE VEHICLE TOWED AS I WAS NOT ABLE TO MOVE MORE THAT 5 FEET
NHTSA ODI #10744220
16,000 miles · Jun 3, 2015
Service Brakes
BRAKE LINE RUSTED AND BRAKES FAILED COMPLETELY SUDDENLY WHEN MY MECHANIC WAS MOVING AUTO FROM HIS GARAGE AFTER SERVICING MY TRANSMISSION I PROBABLY WOULD HAVE BEEN IN A SERIOUS ACCIDENT HAD I PICKED UP MY CAR WITHOUT THAT HAPPENING TO HIM NEVER EXPECTED A BRAKE LINE TO RUST AND CAUSE BRAKES TO SUDDENLY BE GONE I AM SO WOR…
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BRAKE LINE RUSTED AND BRAKES FAILED COMPLETELY SUDDENLY WHEN MY MECHANIC WAS MOVING AUTO FROM HIS GARAGE AFTER SERVICING MY TRANSMISSION I PROBABLY WOULD HAVE BEEN IN A SERIOUS ACCIDENT HAD I PICKED UP MY CAR WITHOUT THAT HAPPENING TO HIM NEVER EXPECTED A BRAKE LINE TO RUST AND CAUSE BRAKES TO SUDDENLY BE GONE I AM SO WORRIED ANOTHER CAR WILL CAUSE DEATHS IF THIS DEFECT IS NOT KNOWN TO OWNER
NHTSA ODI #10723147
150,000 miles · Jun 3, 2015
Service Brakes
TL* THE CONTACT OWNS A 2000 MERCEDES BENZ ML320. WHILE THE VEHICLE WAS BEING TEST DRIVEN BY AN INDEPENDENT MECHANIC, THE BRAKES FAILED WITHOUT WARNING. IT WAS DIAGNOSED THAT THE BRAKE LINE WAS RUSTED AND FAILED. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE. THE FAILURE MILEAGE WAS APPROXIMATELY 15…
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TL* THE CONTACT OWNS A 2000 MERCEDES BENZ ML320. WHILE THE VEHICLE WAS BEING TEST DRIVEN BY AN INDEPENDENT MECHANIC, THE BRAKES FAILED WITHOUT WARNING. IT WAS DIAGNOSED THAT THE BRAKE LINE WAS RUSTED AND FAILED. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE. THE FAILURE MILEAGE WAS APPROXIMATELY 150,000.
NHTSA ODI #10723135
96,000 miles · Mar 13, 2015
Service Brakes
I HAVE EXPERIENCED MULTIPLE INCIDENTS OF A SITUATION WHERE THE ABS, ESP, AND ETS LIGHTS COME ON AND A NOISE OCCURS WHEN DEPRESSING THE GAS PEDAL AT LOW SPEEDS. THE NOISE STOPS ONLY WHEN THE BRAKE PEDAL IS DEPRESSED OR AT SPEEDS OVER 40 MPH. THERE IS ALSO A VIBRATION THAT OCCURS THAT CAN BE FELT BY DEPRESSING THE BRAKE PEDAL. …
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I HAVE EXPERIENCED MULTIPLE INCIDENTS OF A SITUATION WHERE THE ABS, ESP, AND ETS LIGHTS COME ON AND A NOISE OCCURS WHEN DEPRESSING THE GAS PEDAL AT LOW SPEEDS. THE NOISE STOPS ONLY WHEN THE BRAKE PEDAL IS DEPRESSED OR AT SPEEDS OVER 40 MPH. THERE IS ALSO A VIBRATION THAT OCCURS THAT CAN BE FELT BY DEPRESSING THE BRAKE PEDAL. THE NOISE CONTINUES AS SOON AS THE BRAKE PEDAL IS RELEASED. THE CAR BECOMES DIFFICULT TO DRIVE. TURNING THE CAR OFF AND ON AGAIN DOES NOT CLEAR THE PROBLEM. WHEN THE CAR IS TURNED OFF, A NOISE CAN BE HEARD COMING FROM UNDER THE HOOD THAT SOUNDS LIKE A MOTOR OR A FAN THAT IS RUNNING. THIS CONTINUES FOR HOURS. THE HOOD OF THE CAR BECOMES WARM TO HOT TO THE TOUCH. AT SOME POINT THE FAN OR MOTOR STOPS RUNNING. IF THE CAR BATTERY HAS NOT BEEN DRAINED, THE CAR FUNCTIONS NORMALLY--UNTIL THE NEXT TIME THAT THE PROBLEM OCCURS. AFTER A QUICK INTERNET SEARCH, I FOUND MANY SIMILAR REPORTS OF THESE SYMPTOMS BY OTHER OWNERS OF THIS MAKE AND MODEL VEHICLE OF THE SAME OR SIMILAR YEAR OF MANUFACTURE. THE VEHICLE OWNERS HAVE RECEIVED DIAGNOSES OF A BAD ABS CONTROL MODULE, A BAD ABS PUMP, BAD SOLDER JOINTS ON THE ABS PUMP ASSEMBLY'S CIRCUIT BOARD, OR BAD RELAYS IN THE FUSE BOX. REPAIRS HAVE COST IN THE THOUSANDS OF DOLLARS FOR WHAT IS APPARENTLY, A KNOWN DEFECT. DRIVERS OF THESE VEHICLES HAVE BEEN SUBJECTED TO FRIGHTENING INCIDENTS WHERE THEIR SAFETY HAS BEEN COMPROMISED BY THEIR VEHICLES. I REALIZE THAT THE LAW GOVERNS SAFETY DEFECTS IN CARS MANUFACTURED WITHIN THE LAST 10 YEARS. HOWEVER, PEOPLE WITH OLDER CARS NEED RECOURSE FOR KNOWN DEFECTS. A MERCEDES SUCH AS MINE, THAT ONLY HAS ONLY A LITTLE OVER 100K MILES AND THAT HAS BEEN WELL MAINTAINED, HAS A LIFE EXPECTANCY OF AT LEAST ANOTHER 50K TO 100K MILES. HOWEVER, THEY SHOULD BE SAFE MILES. *TR
NHTSA ODI #10694066
130,000 miles · Jan 23, 2015
Electronic Stability Control (esc)Service Brakes
VEHICLE AUTOMATICALLY SWITCHES OFF ITS ANTI-LOCK-BRAKE AND ELECTRONIC-STABILITY-CONTROL SYSTEMS FOR UNKNOWN REASON, THEREBY ENDANGERING ITS DRIVER AND PASSENGERS, AS WELL AS OTHER VEHICLE'S DRIVERS AND PASSENGERS, EVERY TIME IT'S DRIVEN. *TR
NHTSA ODI #10678446
NHTSA investigations
4PE10050 · 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.
PE03058 · Engine Crankshaft Pulley Failure
Opened Dec 17, 2003 · Closed Apr 22, 2004
Status: closed (inferred from source dates) · Engine And Engine Cooling:engine:gasoline:belts And Associated Pulleys
THE OFFICE OF DEFECTS INVESTIGATION (ODI) OPENED THIS PRELIMINARY EVALUATION TO INVESTIGATE ALLEGATIONS OF ENGINE CRANKSHAFT PULLEY HARMONIC BALANCER FAILURE THAT COULD RESULT IN LOSS OF POWER-STEERING ASSIST.ODI HAS RECEIVED A TOTAL OF 546 NON-DUPLICATIVE REPORTS THAT ALLEGE ENGINE CRANKSHAFT PULLEY HARMONIC BALANCER FAILURE ON ALL MERCEDES-BENZ VEHICLES USING THE SUBJECT COMPONENT.THE SUBJECT COMPONENT FAILURES ARE PROGRESSIVE IN NATURE AND ONLY A SMALL PERCENTAGE OF THE COMPLAINTS AND WARRANT CLAIMS INVOLVED A FAILURE THAT HAD PROGRESSED FAR ENOUGH TO EFFECT POWER STEERING PERFORMANCE (6 OF 55 ODI COMPLAINTS REFERENCE INCREASED STEERING EFFORT).THERE HAVE BEEN NO CRASHES OR INJURIES RELATED TO THE ALLEGED DEFECT.A SAFETY-RELATED DEFECT HAS NOT BEEN IDENTIFIED AT THIS TIME AND FURTHER USE OF AGENCY RESOURCES DOES NOT APPEAR TO BE WARRANTED.ACCORDINGLY, THIS INVESTIGATION IS CLOSED.THE CLOSING OF THIS INVESTIGATION DOES NOT CONSTITUTE A FINDING BY NHTSA THAT A SAFETY-RELATED DEFECT DOES NOT EXIST.THE AGENCY WILL TAKE FURTHER ACTION IF WARRANTED BY THE CIRCUMSTANCES.SEE SUMMARY REPORT ATTACHED FOR FURTHER DETAIL.
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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