NHTSA owner reports · September 18, 2026 snapshot.
What owners actually said
166 reportsMileage unknown · Apr 4, 2012
Electrical System
THE BATTERY FAILED AND REQUIRED REPLACEMENT. A "GROUP 49" BATTERY IS SPECIFIED BY THE BATTERY MANUFACTURER'S CATALOG. A GROUP 49 BATTERY WAS PURCHASED, BUT DID NOT FIT. RESEARCH INDICATES THAT THE SUBJECT BATTERY WAS ACTUALLY A GROUP 93 BATTERY, WHICH IS APPROXIMATELY 1/2 INCH SHORTER. RESEARCH ALSO INDICATES THAT SEVERAL MA…
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THE BATTERY FAILED AND REQUIRED REPLACEMENT. A "GROUP 49" BATTERY IS SPECIFIED BY THE BATTERY MANUFACTURER'S CATALOG. A GROUP 49 BATTERY WAS PURCHASED, BUT DID NOT FIT. RESEARCH INDICATES THAT THE SUBJECT BATTERY WAS ACTUALLY A GROUP 93 BATTERY, WHICH IS APPROXIMATELY 1/2 INCH SHORTER. RESEARCH ALSO INDICATES THAT SEVERAL MANUFACTURERS ARE NO LONGER MAKING GROUP 49 BATTERIES BUT ARE EITHER RECOMMENDING GROUP 93 BATTERIES AS THE REPLACEMENT OR, AS I FOUND, APPLYING GROUP 49 LABELS TO THE GROUP 93 BATTERY. IN MY CAR INSTALLING A GROUP 93 BATTERY IS UNSAFE, FOR TWO REASONS. FIRST, THE BATTERY HOLD-DOWN STRAP IS A NON-ADJUSTABLE, SNAP-FIT TYPE INSTALLATION THAT WILL NOT FUNCTION WITH THE LOWER BATTERY HEIGHT. SECOND, THE POSITIVE BATTERY TERMINAL MUST CONNECT TO TWO HEAVY CABLES (MAIN POWER AND ACCESSORY POWER CABLES) WHICH MUST BE FORCED DOWN TO INSTALL ON THE REPOSITIONED (LOWERED) POSITIVE BATTERY POST. FORCING THE CABLES DOWN CAUSES THEM TO RIDE HARD ON NEARBY INSTALLATIONS AND MAY CAUSE FAILURE OF THE INSULATION WHICH COULD LEAD TO A SHOCK HAZARD OR FIRE. THE INITIAL INFORMATION ON THE TRANSITION FROM GROUP 49 TO GROUP 93 BATTERIES CAME FROM THE AAA REPRESENTATIVE WHO ATTEMPTED TO ASSIST ME WITH THE FAILED BATTERY. THE MIS-LABELED BATTERY WAS PURCHASED AT O'REILLY AUTO PARTS ON BEACH BOULEVARD IN WESTMINSTER, CALIFORNIA. *TR
NHTSA ODI #10454147
135,556 miles · Mar 22, 2012
Engine And Engine Cooling
AFTER DRIVING VEHICLE FOR TEN MINUTES, IT WAS PARKED AND ENGINE SECURED. WHEN TRYING TO RESTART VEHICLE, STARTER ENGAGED BUT ENGINE WOULD NOT TURN OVER. STARTER CONTINUED TO RUN FOR APPROXIMATELY FIVE SECONDS AFTER RELEASING THE KEY. INDEPENDENT MECHANIC TOLD ME TO LET THE VEHICLE REST FOR FIFTEEN MINUTES AND THEN RESTART. VEHIC…
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AFTER DRIVING VEHICLE FOR TEN MINUTES, IT WAS PARKED AND ENGINE SECURED. WHEN TRYING TO RESTART VEHICLE, STARTER ENGAGED BUT ENGINE WOULD NOT TURN OVER. STARTER CONTINUED TO RUN FOR APPROXIMATELY FIVE SECONDS AFTER RELEASING THE KEY. INDEPENDENT MECHANIC TOLD ME TO LET THE VEHICLE REST FOR FIFTEEN MINUTES AND THEN RESTART. VEHICLE STARTED NORMALLY AFTER FIFTEEN MINUTE REST. DIAGNOSIS DID NOR RESULT IN ANY COMPUTER CODES. MECHANIC SAID THE YEAR VEHICLES 1998-2002 WERE EXPERIENCING CRANKSHAFT SENSOR FAILURES. SENSOR WAS REPLACED AND VEHICLE IS OPERATING NORMALLY. *TR
NHTSA ODI #10452695
99,000 miles · Mar 20, 2012
Electrical SystemFire
TL* THE CONTACT OWNS A 2000 MERCEDES BENZ ML320. WHILE PARKED, THE CONTACT NOTICED FLAMES COMING FROM UNDER THE HOOD. THE FIRE DEPARTMENT WAS CALLED AND ARRIVED AT THE SCENE TO ASSIST. THE FIRE DEPARTMENT ADVISED THAT THE FIRE ORIGINATED FROM UNDER THE HOOD ON THE FRONT DRIVER SIDE OF THE VEHICLE. THE VEHICLE WAS TOWED TO THE DE…
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TL* THE CONTACT OWNS A 2000 MERCEDES BENZ ML320. WHILE PARKED, THE CONTACT NOTICED FLAMES COMING FROM UNDER THE HOOD. THE FIRE DEPARTMENT WAS CALLED AND ARRIVED AT THE SCENE TO ASSIST. THE FIRE DEPARTMENT ADVISED THAT THE FIRE ORIGINATED FROM UNDER THE HOOD ON THE FRONT DRIVER SIDE OF THE VEHICLE. THE VEHICLE WAS TOWED TO THE DEALER AND DEEMED AS HAVING BEEN DESTROYED. THE VEHICLE WAS NOT REPAIRED. THE APPROXIMATE FAILURE MILEAGE WAS 99,000. UPDATED 04/19/12*LJ UPDATED 04/25/12
NHTSA ODI #10452442
121,700 miles · Jan 31, 2012
SteeringFire
TL* THE CONTACT OWNS A 2000 MERCEDES BENZ ML320. THE CONTACT STATED WHILE DRIVING, THE BATTERY LIGHT ILLUMINATED AND THE STEERING WHEEL BECAME HARD TO TURN. THE ENGINE TEMPERATURE INCREASED AND SMOKE RELEASED FROM UNDER THE HOOD. THE VEHICLE WAS DRIVEN TO THE CONTACTS HOME. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE. THE VE…
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TL* THE CONTACT OWNS A 2000 MERCEDES BENZ ML320. THE CONTACT STATED WHILE DRIVING, THE BATTERY LIGHT ILLUMINATED AND THE STEERING WHEEL BECAME HARD TO TURN. THE ENGINE TEMPERATURE INCREASED AND SMOKE RELEASED FROM UNDER THE HOOD. THE VEHICLE WAS DRIVEN TO THE CONTACTS HOME. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE. THE VEHICLE WAS NOT REPAIRED. THE FAILURE AND THE CURRENT MILEAGE WAS 121,700.
NHTSA ODI #10445977
90,010 miles · Aug 14, 2011
Power Train
MY ML 320 YEAR 2000 MERCEDES-BENZ STOPPED SUDDENLY WHILE I WAS GOING 30 MILES AND HOUR. NO SIGN OF ANY PROBLEM (THAN ENGINE STALLED). THIS IS SCARY AND MUST BE INVESTIGATED. I ALMOST HIT A CAR. IT DID NOT START FOR 20 MINUTES AND THEN IT STARTED. IT WILL CRANK-START FOR 20 SECONDS AND ENGINE WILL STOP AGAIN. CAR STARTED WORKING …
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MY ML 320 YEAR 2000 MERCEDES-BENZ STOPPED SUDDENLY WHILE I WAS GOING 30 MILES AND HOUR. NO SIGN OF ANY PROBLEM (THAN ENGINE STALLED). THIS IS SCARY AND MUST BE INVESTIGATED. I ALMOST HIT A CAR. IT DID NOT START FOR 20 MINUTES AND THEN IT STARTED. IT WILL CRANK-START FOR 20 SECONDS AND ENGINE WILL STOP AGAIN. CAR STARTED WORKING FINE AFTER 45 MINUTES WAIT. *TR
NHTSA ODI #10419401
215,000 miles · Jul 26, 2011
Service Brakes, Hydraulic
TL* THE CONTACT OWNS A 2000 MERCEDES BENZ ML320. THE CONTACT STATED THAT WHILE DRIVING 55 MPH, THE CAUTION AND ESP LIGHTS ILLUMINATED ON THE INSTRUMENT PANEL AND THE BRAKES LOCKED UP WITHOUT WARNING. THE VEHICLE WAS PULLED OVER TO THE SIDE OF THE ROAD AND SHUT OFF FOR A FEW MOMENTS. UPON RESTART, THE VEHICLE OPERATED AS NORMAL A…
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TL* THE CONTACT OWNS A 2000 MERCEDES BENZ ML320. THE CONTACT STATED THAT WHILE DRIVING 55 MPH, THE CAUTION AND ESP LIGHTS ILLUMINATED ON THE INSTRUMENT PANEL AND THE BRAKES LOCKED UP WITHOUT WARNING. THE VEHICLE WAS PULLED OVER TO THE SIDE OF THE ROAD AND SHUT OFF FOR A FEW MOMENTS. UPON RESTART, THE VEHICLE OPERATED AS NORMAL AND WAS TAKEN TO AN AUTHORIZED DEALER WHERE THE YAW RATE SENSOR WAS RELACED. THE CONTACT WAS ALSO INFORMED THAT ANOTHER SENSOR NEEDED TO BE REPLACED, BUT THE REPAIR WAS NOT PERFORMED. THE VEHICLE WAS STILL IN THE POSSESSION OF THE DEALER. THE FAILURE MILEAGE WAS 215,000.
NHTSA ODI #10415253
51,000 miles · Jun 25, 2011
Air BagsEngine And Engine CoolingService Brakes, Hydraulic
I HAVE BEEN THE OWNER OF A 2000 MERCEDES ML320 FOR ABOUT 6 YEARS. THE CAR WAS PURCHASED FROM THE DEALER WITH APPROX. 30,000 MILES. TODAY IT HAS APPROX 73,000 MILES. SINCE OWNING IT, I HAVE HAD SEVERAL PROBLEMS WHICH WERE ALL OUT OF WARRANTY AND WHICH I FEEL WERE UNWARRANTED AND WERE NOT SERIOUSLY ATTENDED TO BY MB OR THE DEALE…
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I HAVE BEEN THE OWNER OF A 2000 MERCEDES ML320 FOR ABOUT 6 YEARS. THE CAR WAS PURCHASED FROM THE DEALER WITH APPROX. 30,000 MILES. TODAY IT HAS APPROX 73,000 MILES. SINCE OWNING IT, I HAVE HAD SEVERAL PROBLEMS WHICH WERE ALL OUT OF WARRANTY AND WHICH I FEEL WERE UNWARRANTED AND WERE NOT SERIOUSLY ATTENDED TO BY MB OR THE DEALER: THIS COMPLAINT FORM WAS VERY DIFFICULT TO COMPLETE ACCORDING TO THE FIELDS PROVIDED. THE EQUIPMENT INFORMATION INCLUDED IS NOT CORRECT AND WAS INCLUDED JUST TO GET TO THE FORM. I FELT THAT THE PROBLEMS WITH THE CAR SHOULD BE REPORTED SPECIFICALLY THE ESP LIGHT AND THE AIR BAG PROBLEMS AT ABOUT 51,000 MILES, THE AIRBAG BECAME INOPERATIVE. I WAS TOLD THAT IT WOULD COST ABOUT $2000 TO REPAIR AND CORRECT. DEALER OFFERED A SMALL ADJUSTMENT. I CHOSE NOT TO MAKE THE INVESTMENT. AT ABOUT 65,000 MILES, I BEGAN HAVING VERY LOUD NOISES THAT SEEMED TO COME FROM THE CRANKSHAFT AND APPEARED TO BE A BRAKE PROBLEM. DEALER DID TRY TO DETERMINE WHAT IT WAS, BUT COULDN'T ISOLATE THE PROBLEM UNLESS "HE HAD TO TAKE THE WHOLE CAR APART" THERE WAS A RELATED PROBLEM BECAUSE THE ESP LIGHT WOULD COME ON INTERMITTENTLY THAT THE DEALER ADVISED COULD NOT BE ISOLATED UNLESS I DID THE WORK ON THE BRAKE AND THE CRANKSHAFT:" AT ABOUT 72,000 MILES, THE CAR DEVELOPED OIL LEAKS FROM THE MOTOR. EST. COST OF REPAIR WAS $2000. WE ARE WATCHING AND WAITING. IN MAY, I WAS ADVISED THAT THERE IS A RECALL NOTICE ON THE CRUISE CONTROL OF THE CAR. NO WORD ON THAT ISSUE SINCE. BECAUSE OF THE CRUISE CONTROL NOTICE I RECEIVED, I WAS PROMPTED TO WRITE YOU ABOUT THESE OTHER ISSUES AND BECAME FURTHER CONCERNED ABOUT THE ESP LIGHT AND THE FAULTY AIR BAG THE CARE HAS HAD., CAR IS DRIVEN AN AVERAGE OF 150 MILES A WEEK IN MOSTLY CITY DRIVING. CAR IS SERVICED BUT NOT BY THE DEALER BECAUSE OF THE HIGH COST AND RELATIVE DISSATISFACTION FROM THE SERVICE PROVIDED. UPDATED 07/27/11 *TR
NHTSA ODI #10408880
100,000 miles · Jun 3, 2011
Exterior Lighting
TL* THE CONTACT OWNS A 2000 MERCEDES BENZ ML320. THE CONTACT WAS DRIVING WITH THE CRUISE CONTROL ACTIVATED AND WHEN SHE TAPPED ON THE BRAKES TO DISENGAGE THE COMPONENT, THE VEHICLE ACCELERATED ABNORMALLY AS OPPOSED TO DECELERATING. THE CONTACT HAD TO SHIFT INTO NEUTRAL IN ORDER TO STOP THE VEHICLE FROM ACCELERATING ANY FURTHER. …
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TL* THE CONTACT OWNS A 2000 MERCEDES BENZ ML320. THE CONTACT WAS DRIVING WITH THE CRUISE CONTROL ACTIVATED AND WHEN SHE TAPPED ON THE BRAKES TO DISENGAGE THE COMPONENT, THE VEHICLE ACCELERATED ABNORMALLY AS OPPOSED TO DECELERATING. THE CONTACT HAD TO SHIFT INTO NEUTRAL IN ORDER TO STOP THE VEHICLE FROM ACCELERATING ANY FURTHER. THE VEHICLE WAS TOWED TO THE DEALER WHO DIAGNOSED THAT THE BRAKE LIGHT SWITCH WAS DEFECTIVE AND NEEDED TO BE REPLACED. THE FAILURE RECURRED FIVE TIMES AND EACH TIME, THE VEHICLE WAS TAKEN TO THE DEALER WHERE THE IDENTICAL, DIAGNOSIS WAS PROVIDED. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE WHO DID NOT OFFER ANY ASSISTANCE, STATING THAT THE VEHICLE WAS NO LONGER UNDER FACTORY WARRANTY. THE FAILURE MILEAGE WAS 100,000 AND CURRENT MILEAGE WAS NOT AVAILABLE.
NHTSA ODI #10404383
112,500 miles · Apr 21, 2011
Unknown Or Other
THE VEHICLE LOST ALL POWER SUDDENLY. OTHER OWNERS HAVE ALSO EXPERIENCED SIMILAR PROBLEMS. I FOUND THIS OUT BY SEARCHING THE INTERNET. I FOLLOWED WHAT OTHERS HAVE DONE. I HAD A LOCAL GARAGE REPLACE THE CPS-CRANKSHAFT POSITION SENSOR AND THE PROBLEM HAS RESOLVED. I SUSPECT FAULTY DESIGN OF THE CRANKSHAFT POSITION SENSOR. VER…
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THE VEHICLE LOST ALL POWER SUDDENLY. OTHER OWNERS HAVE ALSO EXPERIENCED SIMILAR PROBLEMS. I FOUND THIS OUT BY SEARCHING THE INTERNET. I FOLLOWED WHAT OTHERS HAVE DONE. I HAD A LOCAL GARAGE REPLACE THE CPS-CRANKSHAFT POSITION SENSOR AND THE PROBLEM HAS RESOLVED. I SUSPECT FAULTY DESIGN OF THE CRANKSHAFT POSITION SENSOR. VERY FORTUNATE THAT NO ONE WAS INJURED. MY 16 YEAR OLD DAUGHTER WAS DRIVING.
NHTSA ODI #10397750
110,000 miles · Apr 18, 2011
Engine And Engine Cooling
TL* THE CONTACT OWNS A 2000 MERCEDES-BENZ ML320. THE CONTACT STATED THAT WHILE DRIVING 20 MPH, THE CHECK ENGINE WARNING LIGHT ILLUMINATED AND THE VEHICLE BEGAN TO LOSE POWER UNTIL STALLING. THE CONTACT WAS UNABLE TO RESTART THE VEHICLE AND IT WAS TOWED TO AN INDEPENDENT MECHANIC WHERE THE CONTACT WAS AWAITING A DIAGNOSIS OF THE …
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TL* THE CONTACT OWNS A 2000 MERCEDES-BENZ ML320. THE CONTACT STATED THAT WHILE DRIVING 20 MPH, THE CHECK ENGINE WARNING LIGHT ILLUMINATED AND THE VEHICLE BEGAN TO LOSE POWER UNTIL STALLING. THE CONTACT WAS UNABLE TO RESTART THE VEHICLE AND IT WAS TOWED TO AN INDEPENDENT MECHANIC WHERE THE CONTACT WAS AWAITING A DIAGNOSIS OF THE FAILURE. THE MANUFACTURER WAS CONTACTED AND THEY OFFERED NO ASSISTANCE. THE FAILURE AND CURRENT MILEAGE WAS APPROXIMATELY 110,000.
NHTSA ODI #10396668
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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