NHTSA owner reports · September 18, 2026 snapshot.
Vehicle Speed Control complaints
11 reportsClear category filterMileage unknown · Jun 19, 2018
Electrical SystemUnknown Or OtherVehicle Speed Control
"TAKATS RECALL" 1ST ISSUE I NOTICED IS WHEN I GAVE SOMEONE A JUMP OFF A DEAD CAR BATTERY. AS I WAS DRIVEN I NOTICED MY CAR BATTERY LIGHT CAME ON MEANING MY BATTERY WAS DECREASING POWER AND IT DID I WAS ON MY WAY HOME DRIVEN I NOTICED MY CAR LOSING POWER IN THE CAR SHUT COMPLETELY OFF SO I PULLED TO THE SIDE AND I CALLED SOMEONE …
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"TAKATS RECALL" 1ST ISSUE I NOTICED IS WHEN I GAVE SOMEONE A JUMP OFF A DEAD CAR BATTERY. AS I WAS DRIVEN I NOTICED MY CAR BATTERY LIGHT CAME ON MEANING MY BATTERY WAS DECREASING POWER AND IT DID I WAS ON MY WAY HOME DRIVEN I NOTICED MY CAR LOSING POWER IN THE CAR SHUT COMPLETELY OFF SO I PULLED TO THE SIDE AND I CALLED SOMEONE TO GIVE ME A JUMP THE CAR STARTED BACK UP DROVE ABOUT 3, BLOCKS AND THE CAR SHUT COMPLETELY OFF AGAIN SO I PURCHASED A BRAND NEW BATTERY REPLACING THE OLD BATTERY WITH AN NEW ONE. GOT ANOTHER JUMP TO GIVE THE THE BATTERY SOME EXTRA JUICE. AFTER I RECEIVED THE JUMP I'M BACK ON THE ROAD. IN THE ANCIENT OCCUR AGAIN SO I CALLED SOMEONE TO GIVE ME A JUMP. THIS TIME THE CAR DIDN'T START. SO I HAD TO GET IT TOW HOME. GOT HOME DID SOME RESEARCH IN FOUND OUT IT WAS THE ALTERNATOR. REPLACE THE OLD ALTERNATOR WITH A NEW ONE. 2ND ISSUE I NOTICED AFTER I REPLACED THE OLD ALTERNATOR WITH THE NEW ONE I NOTICED MY TWO FANS BLOWER WILL CONTINUOUSLY RUN FOR HOURS WHEN I TAKE MY CAR KEYS OUT OF THE IGNITION. AND DUE TO THAT THAT CAUSE MY DRAINED MY BATTERY CAUSING ME TO LOSE POWER AND MY CAR WON'T BE ABLE TO START WHEN I PUT MY KEY IN THE IGNITION I DON'T KNO IF THEY CONNECTED A WIRE TO KEEP RUNNING IF SO HE WAS TO SUPPOSED TO TELL ME THAT WHICH HE DIDN'T. 3RD ISSUE I NOTICED I RECENTLY ADDED NEW FRONT PADS AND ROTOR'S NEW REAR PADS AND ROTORS 1 NEW REAR PASSSGER SIDE BRAKE CALIPER. MY BRAKE LIGHTS STILL APPEARED TO POP UP I TOLD THE MERCHANT HE TOLD ME IT COULD BE A SENSOR FAILURE AND GET CHECK OUT AT A MERCEDES BENZ DEALER. 4TH ISSUE THE TRIANGLE LIGHT LOCATED IN THE CENTER OF DASH FLASHES OCCASIONALLY CAUSING UNDER CERTAIN CIRCUMSTANCES, TAPPING THE BRAKE PEDAL MAY NOT AUTOMATICALLY DISENGAGE CRUISE CONTROL AS EXPECTED IN CERTAIN MODEL YEAR RECALL SUBJECT: SUSPENSION: FRONT CONTROL ARM UPPER ARM .RECALL: 6/SERVICE BULLETINS: 2
NHTSA ODI #11102558
144,000 miles · Aug 9, 2016
Service BrakesVehicle Speed Control
TL* THE CONTACT OWNS A 2002 MERCEDES BENZ ML320. THE CONTACT STATED THAT WHILE DRIVING AT 60 MPH, THE BRAKES INDEPENDENTLY ENGAGED AND CAUSED THE VEHICLE TO VEER TO THE SIDE OF THE ROAD. THE CONTACT MENTIONED THAT THE ABS WARNING LIGHT ILLUMINATED AND THEN THE ENTIRE INSTRUMENT PANEL ILLUMINATED. THE VEHICLE WAS RESTARTED BUT TH…
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TL* THE CONTACT OWNS A 2002 MERCEDES BENZ ML320. THE CONTACT STATED THAT WHILE DRIVING AT 60 MPH, THE BRAKES INDEPENDENTLY ENGAGED AND CAUSED THE VEHICLE TO VEER TO THE SIDE OF THE ROAD. THE CONTACT MENTIONED THAT THE ABS WARNING LIGHT ILLUMINATED AND THEN THE ENTIRE INSTRUMENT PANEL ILLUMINATED. THE VEHICLE WAS RESTARTED BUT THE FAILURE RECURRED INTERMITTENTLY. THE VEHICLE WAS TAKEN TO AN INDEPENDENT MECHANIC WHERE IT WAS DIAGNOSED THAT THE BRAKE LAMP SWITCH FAILED. THE VEHICLE WAS NOT REPAIRED. THE CONTACT MENTIONED THAT THE VIN WAS INCLUDED IN NHTSA CAMPAIGN NUMBER: 11V208000 (VEHICLE SPEED CONTROL). THE MANUFACTURER WAS NOT NOTIFIED OF THE FAILURE. THE FAILURE MILEAGE WAS 144,000.
NHTSA ODI #10894297
120,000 miles · Mar 17, 2013
Electrical SystemUnknown Or OtherVehicle Speed Control
MY 2002 ML320 CLUSTER DISPLAY LIGHTS ON MY DASH ALL LIGHT UP, THE CHECK ENGINE LIGHT COMES ON, THE SPEEDOMETER STOPS WORKING ACTUALLY GOES TO ZERO. ONCE THE CAR COMES TO A COMPLETE STOP IT ACCELERATES VERY SLOWLY AND WILL NOT SHIFT OUT OF FIRST GEAR. THIS IS VERY FRIGHTENING FOR SOMEONE IN TRAFFIC AND THIS HAPPENS WITHOUT WARN…
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MY 2002 ML320 CLUSTER DISPLAY LIGHTS ON MY DASH ALL LIGHT UP, THE CHECK ENGINE LIGHT COMES ON, THE SPEEDOMETER STOPS WORKING ACTUALLY GOES TO ZERO. ONCE THE CAR COMES TO A COMPLETE STOP IT ACCELERATES VERY SLOWLY AND WILL NOT SHIFT OUT OF FIRST GEAR. THIS IS VERY FRIGHTENING FOR SOMEONE IN TRAFFIC AND THIS HAPPENS WITHOUT WARNING. PLEASE INVESTIGATE THIS ISSUE BEFORE SOMEONE IS REAR ENDED AND DIES. *TR
NHTSA ODI #10503370
83,367 miles · Jun 14, 2011
Vehicle Speed Control
TL* THE CONTACT OWNS A 2002 MERCEDES BENZ ML320. THE CONTACT WAS DRIVING WITH THE CRUISE CONTROL ACTIVATED WHEN THE VEHICLE ABNORMALLY ACCELERATED UP TO 90 MPH. THE CONTACT WAS UNABLE TO DISENGAGE THE CRUISE CONTROL ALTHOUGH SHE WAS DEPRESSING THE BREAK PEDAL. THE VEHICLE WAS TAKEN TO THE DEALER WHO DIAGNOSED THAT THE ACCELERATO…
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TL* THE CONTACT OWNS A 2002 MERCEDES BENZ ML320. THE CONTACT WAS DRIVING WITH THE CRUISE CONTROL ACTIVATED WHEN THE VEHICLE ABNORMALLY ACCELERATED UP TO 90 MPH. THE CONTACT WAS UNABLE TO DISENGAGE THE CRUISE CONTROL ALTHOUGH SHE WAS DEPRESSING THE BREAK PEDAL. THE VEHICLE WAS TAKEN TO THE DEALER WHO DIAGNOSED THAT THE ACCELERATOR, CRUISE CONTROL AND THE ELECTRIC KIT WERE DEFECTIVE AND NEEDED TO BE REPLACED. THE MANUFACTURER WAS NOT MADE AWARE OF THE FAILURE. THE VEHICLE WAS REPAIRED. THE FAILURE MILEAGE WAS 83,367 AND THE CURRENT MILEAGE WAS 113,000.
NHTSA ODI #10406806
115,000 miles · May 23, 2011
Electrical SystemVehicle Speed Control
RUN OVER THE ANY PUMP ON THE ROAD THAT CAUSE THE GAS PEDAL PUSH DOWN TO THE BOTTOM, STILL DIDN'T ACCELERATE CAUSE THE CAR SLOWLY DOWN, THIS CAUSE EVERYTIME DRIVER OVER THE PUMP. *TR
NHTSA ODI #10402400
112,000 miles · Jan 9, 2011
Electronic Stability Control (esc)Vehicle Speed Control
TO WHOM IT MAY CONCERN, I HAD A NEAR DEATH EXPERIENCE WHILE DRIVING ONE OF YOUR VEHICLES. I AM THE OWNER OF A MERCEDES 2002 ML320, WHICH WAS PURCHASED AT A PHILLIPS MERCEDES DEALERSHIP IN VIRGINIA BEACH VA. I NEED TO ADDRESS A VERY SERIOUS INCIDENT THAT OCCURRED OVER THE WEEKEND (DECEMBER 18, 2010). I WAS DRIVING BACK FROM RIC…
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TO WHOM IT MAY CONCERN, I HAD A NEAR DEATH EXPERIENCE WHILE DRIVING ONE OF YOUR VEHICLES. I AM THE OWNER OF A MERCEDES 2002 ML320, WHICH WAS PURCHASED AT A PHILLIPS MERCEDES DEALERSHIP IN VIRGINIA BEACH VA. I NEED TO ADDRESS A VERY SERIOUS INCIDENT THAT OCCURRED OVER THE WEEKEND (DECEMBER 18, 2010). I WAS DRIVING BACK FROM RICHMOND GOING TOWARD VIRGINIA BEACH, I WAS DRIVING 70 MPH ON I-64 AND HAD IT ON CRUISE CONTROL, AHEAD I SAW THAT TRAFFIC SLOWING DOWN SO I STEPPED ON THE BREAK; I THEN REALIZED THAT MY BRAKES WEREN'T WORKING AND I WAS UNABLE TO STOP OR SLOW THE CAR DOWN. I ATTEMPTED TO PUSH THE BREAK PEDAL DOWN AND IT WOULDN'T NUDGE EVEN THOUGH I APPLIED ALL OF MY WEIGHT TO IT, THE SPEED DID NOT DIMINISH AT ALL, I THEN TRIED THE EMERGENCY BRAKE AND THAT ALSO FAILED TO SLOW ME DOWN, MY FRIEND SUGGESTED THAT I PUT THE CAR IN NEUTRAL AND THEN TRY THE BRAKE, FORTUNATELY THAT WORKED AND WAS FINALLY ABLE TO COME TO A COMPLETE STOP. IT WAS ONE OF THE SCARIEST EXPERIENCES OF MY LIFE. YOUR PRODUCT PUT MY FRIEND'S AND MY LIFE IN JEOPARDY. I HAD THE BAS/ESP LIGHT COME ON IN THE PASS AND HAVE BROUGHT IT IN FOR REPAIRS 3 TIMES ALREADY: 07/27/2005, 12/01/2009 AND IN 10/19/2010. I AM STUNNED THAT A COMPANY WHO HAS SUCH A GREAT REPUTATION AND SEEMS TO THRIVE ON CUSTOMER SATISFACTION DROPPED THE BALL. AT NO POINT IN TIME DID ANY OF THE TECHNICIANS WHO PERFORMED THE REPAIRS ON MY CAR ADVISE ME OF THE POTENTIAL DANGER. *TR
NHTSA ODI #10375310
88,000 miles · Jun 21, 2010
Vehicle Speed Control
TL* THE CONTACT OWNS A 2002 MERCEDES BENZ ML320. THE CONTACT STATED WHILE DRIVING AT APPROXIMATE SPEEDS OF 60MPH, THE VEHICLE ABNORMALLY ACCELERATED TO SPEEDS OF 70 MPH WITHOUT DRIVER INTENT. THE CONTACT ATTEMPTED TO APPLY THE BRAKES BUT TO NO AVAIL. SHE THEN APPLIED ABRUPT PRESSURE TO THE BRAKE PEDAL USING BOTH FEET AND THE VE…
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TL* THE CONTACT OWNS A 2002 MERCEDES BENZ ML320. THE CONTACT STATED WHILE DRIVING AT APPROXIMATE SPEEDS OF 60MPH, THE VEHICLE ABNORMALLY ACCELERATED TO SPEEDS OF 70 MPH WITHOUT DRIVER INTENT. THE CONTACT ATTEMPTED TO APPLY THE BRAKES BUT TO NO AVAIL. SHE THEN APPLIED ABRUPT PRESSURE TO THE BRAKE PEDAL USING BOTH FEET AND THE VEHICLE BEGAN TO SLOWLY DECREASE IN SPEED. SHE WAS ABLE TO STOP THE VEHICLE BY ENGAGING THE EMERGENCY BRAKE AND SHIFTING INTO NEUTRAL. THE VEHICLE WAS TOWED TO THE DEALER WHERE SHE WAS AWAITING DIAGNOSTIC TESTING. THE FAILURE AND CURRENT MILEAGES WERE APPROXIMATELY 88,000.
NHTSA ODI #10339356
118,206 miles · May 16, 2010
Service Brakes, HydraulicVehicle Speed Control
[MERCEDES BENZ ML 320 2002] WHILE DRIVING EAST ON ROUTE 80 AT 65 MPH AND APPROACHING THE TOLL BOOTHS OF THE GEORGE WASHINGTON BRIDGE, I TAPPED MY BRAKES TO DISENGAGE MY SPEED CONTROL. THE SPEED CONTROL DID NOT SHUT DOWN. I HIT THE BRAKE PEDAL SEVERAL MORE TIMES HARDER AND HARDER, BUT THE SPEED CONTROL STAYED IN CONTROL. I PUS…
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[MERCEDES BENZ ML 320 2002] WHILE DRIVING EAST ON ROUTE 80 AT 65 MPH AND APPROACHING THE TOLL BOOTHS OF THE GEORGE WASHINGTON BRIDGE, I TAPPED MY BRAKES TO DISENGAGE MY SPEED CONTROL. THE SPEED CONTROL DID NOT SHUT DOWN. I HIT THE BRAKE PEDAL SEVERAL MORE TIMES HARDER AND HARDER, BUT THE SPEED CONTROL STAYED IN CONTROL. I PUSHED DOWN VERY HARD ON THE BRAKE PEDAL WITH BOTH FEET AND ALTHOUGH THE CAR SLOWED A LITTLE, THE SPEED CONTROL DRAMATICALLY SPEEDED UP THE ENGINE WITH THE TACHOMETER GOING ALMOST FULL SCALE. I WAS ABLE TO REDUCE THE CAR'S SPEED FROM ABOUT 65 TO UNDER 50 MPH, BUT WAS STILL PRETTY SCARED. THIS WAS A TERRIFYING EXPERIENCE AND AS AN ENGINEER I REALIZED MY OPTIONS AND TIME TO REACT WERE VERY LIMITED! I FIGURED MY CHOICES WERE FEW: 1) BRAKE UNTIL THE CAR EITHER STOPPED OR I HAD HIT THE STOPPED CARS AT THE TOLL BOOTHS (MAYBE DAMAGE THE TRANSMISSION FURTHER), 2) SHIFT THE CAR INTO NEUTRAL HOPING THAT EITHER THE SPEED CONTROL WOULD DISENGAGE OR AT LEAST I COULD STOP THE CAR (ENGINE RPMS MIGHT RUN AWAY AND DESTROY THE ENGINE), OR 3) TRY TO SHUT OFF THE SPEED CONTROL WITH THE CONTROL STALK ON THE LEFT OF THE STEERING COLUMN (WHICH I OBVIOUSLY COULD NOT READ CLOSELY TO FIGURE OUT WHERE THE STOP MIGHT BE). FORTUNATELY, WITH SEVERAL TRIES I WAS ABLE TO FIND THE STOP POSITION ON THE SPEED CONTROL STALK AND DISENGAGE THE CONTROL. I BRAKED VERY HARD TO STOP SHORT OF A COLLISION..... AND GOT HARSH WORDS AND LOOKS FROM THE ADJACENT TOLL COLLECTORS. I SUSPECTED THAT THE BRAKE LIGHT SWITCH WAS NOT WORKING AND THIS WAS CONFIRMED BY MY MECHANIC (EDDIE RODRIGUEZ OF EDDY'S TOTAL AUTO CARE). THE MECHANIC ALSO HAS TO REPLACE THE BRAKE PRESSURE SENSOR. MY WIFE IS INSISTING THAT I GET RID OF THE CAR IMMEDIATELY AND BUY A NEW CAR. I LOVE MY ML 320..... BUT I LOVE MY WIFE TOO! *TR
NHTSA ODI #10330616
105,003 miles · Oct 31, 2008
Electronic Stability Control (esc)Vehicle Speed Control
WAS DRIVING VEHICLE ON HIGHWAY AT 75 MPH SET SPEED IN CRUISE CONTROL AND STEPPED ON BRAKE AS I APPROACHED TRAFFIC CONGESTION. VEHICLE WOULD NOT STOP AND CONTINUED TO MAINTAIN SET SPEED REGARDLESS HOW HARD I PRESSED ON THE BRAKE. EVENTUALLY, I DECIDED TO TRY SHIFTING INTO NEUTRAL AND THE VEHICLE WAS PLACED BACK UNDER CONTROL OF T…
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WAS DRIVING VEHICLE ON HIGHWAY AT 75 MPH SET SPEED IN CRUISE CONTROL AND STEPPED ON BRAKE AS I APPROACHED TRAFFIC CONGESTION. VEHICLE WOULD NOT STOP AND CONTINUED TO MAINTAIN SET SPEED REGARDLESS HOW HARD I PRESSED ON THE BRAKE. EVENTUALLY, I DECIDED TO TRY SHIFTING INTO NEUTRAL AND THE VEHICLE WAS PLACED BACK UNDER CONTROL OF THE FOOTBRAKE. THANKFULLY, THE VEHICLE WAS SLOWED DOWN WITHOUT INCIDENT BUT IT WAS A VERY SCARY MOMENT. NOTICED, AT THIS TIME, THE BAS/ESP MALFUNCTION INDICATOR LAMP WAS DISPLAYED ON THE DASHBOARD. DROVE VEHICLE DIRECTLY TO A MERCEDES DEALERSHIP FOR REPAIRS. DEALER ADVISED STOP LAMP SWITCH SHORTED. REPLACED LAMP SWITCH. ALTHOUGH, THIS WAS THE FIRST INCIDENT WHILE IN CRUISE CONTROL THE VEHICLE DID HAVE SIMILAR PAST PROBLEMS WITH THE BRAKING SYSTEM (IE-BRAKE SWITCH AND SHIFTER CONTROL MODULE WERE REPLACED) THAT PREVENTED SHIFTING OUT OF PARK INTO ANY OTHER POSITION. VEHICLE SHOULD HAVE SAFETY DEVICE TO OVERRIDE "CRUISE CONTROL" OR PREVENT "CRUISE CONTROL" OPERATION WITH ANY MALFUNCTION IN THE BRAKING SYSTEM OR ACTIVATION OF THE BRAKING INDICATOR LAMP. WHAT ASSURANCES ARE THERE TO PREVENT THIS FROM HAPPENING AGAIN? *TR
NHTSA ODI #10247405
102,000 miles · Jun 12, 2007
Vehicle Speed Control
DRIVING ON RT 30 IN CAMDEN NJ WHEN MY VEHICLE BEGAN ACCELERATING AT HIGH RATE OF SPEED (I WAS TRAVELING AT 50MPH AND VEHICLE SPED UP TO ABOUT 80 AND I COULD NOT STOP IT). I HAD TO PUT EMERGENCY BRAKES AND ULTIMATELY PUT VEHICLE INTO PARK TO GET IT TO STOP. NOTHING IN VEHICLE CAUSED VEHICLE TO ACCELERATE AND VEHICLE DID NOT STO…
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DRIVING ON RT 30 IN CAMDEN NJ WHEN MY VEHICLE BEGAN ACCELERATING AT HIGH RATE OF SPEED (I WAS TRAVELING AT 50MPH AND VEHICLE SPED UP TO ABOUT 80 AND I COULD NOT STOP IT). I HAD TO PUT EMERGENCY BRAKES AND ULTIMATELY PUT VEHICLE INTO PARK TO GET IT TO STOP. NOTHING IN VEHICLE CAUSED VEHICLE TO ACCELERATE AND VEHICLE DID NOT STOP AND NEARLY CAUSED ME TO DRIVE INTO TRAFFIC. MERCEDES DENIES HAVING ANY PROBLEMS WITH VEHICLES AND BLAMED ME FOR OPERATION. I HAVE BEEN DRIVING ON THE ROAD AS A POLICE OFFICER FOR 14 YEARS AND KNOW THAT IT WAS AN ISSUE WITH VEHICLE THAT CAUSED THIS PROBLEM
NHTSA ODI #10192995
NHTSA investigations
1PE10050 · 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
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