I WAS DRIVING AT 40-45 MPH WHEN I NOTICED AN ORANGE GLOW UNDER THE PASSENGER SIDE MIRROR. WITHIN A FEW SECONDS THE LIGHT TURNED YELLOW, AND SUDDENLY I NOTICED FLAMES ARE SHOOTING OUT OF THE SIDE MIRROR ALONG WITH THICK BLACK SMOKE. I IMMEDIATELY TURNED INTO A GAS STATION AND PUT OFF THE FIRE WITH WATER HOSE. I WAS AFRAID OF THE …
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I WAS DRIVING AT 40-45 MPH WHEN I NOTICED AN ORANGE GLOW UNDER THE PASSENGER SIDE MIRROR. WITHIN A FEW SECONDS THE LIGHT TURNED YELLOW, AND SUDDENLY I NOTICED FLAMES ARE SHOOTING OUT OF THE SIDE MIRROR ALONG WITH THICK BLACK SMOKE. I IMMEDIATELY TURNED INTO A GAS STATION AND PUT OFF THE FIRE WITH WATER HOSE. I WAS AFRAID OF THE FIRE TO GET INSIDE THE CAR. *TR
NHTSA ODI #10267033
63,000 miles · Jan 7, 2009
Electrical SystemEngine And Engine CoolingService Brakes, Hydraulic
TL*THE CONTACT OWNS A 2002 MERCEDES BENZ ML320. WHILE DRIVING LESS THAN 70 MPH, THE FRONT PASSENGER SIDE BRAKE LOCKED UP AND CAUSED THE VEHICLE TO SWERVE INTO A MEDIAN. THE ABS WARNING INDICATOR ILLUMINATED ON THE INSTRUMENT PANEL AT THE SAME TIME THE BRAKES LOCKED. THE CONTACT NEVER DEPRESSED THE BRAKE PEDAL NOR THE ACCELERA…
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TL*THE CONTACT OWNS A 2002 MERCEDES BENZ ML320. WHILE DRIVING LESS THAN 70 MPH, THE FRONT PASSENGER SIDE BRAKE LOCKED UP AND CAUSED THE VEHICLE TO SWERVE INTO A MEDIAN. THE ABS WARNING INDICATOR ILLUMINATED ON THE INSTRUMENT PANEL AT THE SAME TIME THE BRAKES LOCKED. THE CONTACT NEVER DEPRESSED THE BRAKE PEDAL NOR THE ACCELERATOR PEDAL FOR THE BRAKES TO LOCK. THE VEHICLE WAS TAKEN TO THE DEALER AND THEY STATED THAT THE YAW RATE SENSOR FAILED. THE REPAIRS WERE SCHEDULED UNDER WARRANTY. THE FAILURE AND CURRENT MILEAGES WERE 63,000. UPDATED 02/05/09 *BF THE BAS/ESP LIGHT ILLUMINATED. THE CATALYTIC CONVERTER WAS CRACKED AND THE TRANSMISSION ELECTRICAL CONNECTOR WAS LEAKING.. UPDATED 02/06/09.*JB
NHTSA ODI #10254094
95,000 miles · Dec 2, 2008
Electrical System
VEHICLE'S DRIVE AUTHORIZATION SYSTEM FAILS TO RECOGNIZE KEY RESULTING IN A 'START ERROR' DISPLAYING ON DASH AND VEHICLE WILL NOT START. THIS ITEM CAN ONLY BE REPLACED BY THE DEALER AND IS A KNOWN DEFECT BY MERCEDES BENZ. THE DASH CONTROL UNIT IS PART # A163 545 28 32 AND IS REPLACED BY A MODIFIED VERSION A163 545 07 06. MERCEDES…
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VEHICLE'S DRIVE AUTHORIZATION SYSTEM FAILS TO RECOGNIZE KEY RESULTING IN A 'START ERROR' DISPLAYING ON DASH AND VEHICLE WILL NOT START. THIS ITEM CAN ONLY BE REPLACED BY THE DEALER AND IS A KNOWN DEFECT BY MERCEDES BENZ. THE DASH CONTROL UNIT IS PART # A163 545 28 32 AND IS REPLACED BY A MODIFIED VERSION A163 545 07 06. MERCEDES REQUIRES OWNERS TO BEAR FULL FINANCIAL RESPONSIBILITY FOR THIS REPAIR, EVEN THOUGH IT IS A KNOWN DEFECT WHICH CAN RESULT IN STALLS AND NO START SITUATION, POTENTIALLY PUTTING THE DRIVER AND PASSENGERS IN DANGER. THE COST OF THIS REPAIR IS APPROX. $800 TO $1000. A TECHNICAL SERVICE BULLETIN WAS ISSUED BY MERCEDES BENZ AND THAT BULLETIN IS T-B-80.57/32 AND WAS ISSUED ON FEBRUARY 7, 2005. IT COVERS ALL M CLASS MODELS FROM 2000 TO 2005 MODEL YEAR. *TR
NHTSA ODI #10250462
22,000 miles · Aug 4, 2008
Electrical System
TL*THE CONTACT OWNS A 2002 MERCEDES BENZ ML320. WHILE DRIVING 25 MPH, THE INSTRUMENT PANEL LIGHTS ILLUMINATED WITHOUT WARNING. AS A RESULT, THE BRAKE PEDAL EXTENDED TO THE FLOOR WHEN DEPRESSED. THE DEALER STATED THAT A BLOWN FUSE CAUSED THE FAILURE AND THEY MADE THE REPLACEMENT. THE FAILURE RECURRED APPROXIMATELY ONE WEEK LA…
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TL*THE CONTACT OWNS A 2002 MERCEDES BENZ ML320. WHILE DRIVING 25 MPH, THE INSTRUMENT PANEL LIGHTS ILLUMINATED WITHOUT WARNING. AS A RESULT, THE BRAKE PEDAL EXTENDED TO THE FLOOR WHEN DEPRESSED. THE DEALER STATED THAT A BLOWN FUSE CAUSED THE FAILURE AND THEY MADE THE REPLACEMENT. THE FAILURE RECURRED APPROXIMATELY ONE WEEK LATER. THE DEALER STATED THAT THERE WAS ANOTHER BLOWN FUSE AND MADE THE REPLACEMENT AGAIN. THE CONTACT STATED THAT THE DEALER HAS INSPECTED THE VEHICLE APPROXIMATELY 27 TIMES FOR THE SAME FAILURE, BUT THEY HAVE BEEN UNABLE TO DIAGNOSE THE CAUSE OF THE FAILURE. AS OF AUGUST 4, 2008, THE DEALER HAD NOT REPAIRED THE VEHICLE. THE FAILURE MILEAGE WAS 22,000 AND CURRENT MILEAGE WAS 56,000.
NHTSA ODI #10236930
20,500 miles · Jul 28, 2008
Electrical System
TL*THE CONTACT OWNS A 2002 MERCEDES BENZ ML320. A MONTH AFTER PURCHASING THE VEHICLE, THE CONTACT EXPERIENCED DASHBOARD FAILURE. THE HAZARD LIGHTS BEGAN FLASHING ON AND OFF. SHE TOOK THE VEHICLE TO THE DEALER AND THEY DISCOVERED A DEFECT IN THE ELECTRICAL COMPONENT. THEY REPLACED A FUSE, WHICH CORRECTED THE FAILURE FOR APPRO…
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TL*THE CONTACT OWNS A 2002 MERCEDES BENZ ML320. A MONTH AFTER PURCHASING THE VEHICLE, THE CONTACT EXPERIENCED DASHBOARD FAILURE. THE HAZARD LIGHTS BEGAN FLASHING ON AND OFF. SHE TOOK THE VEHICLE TO THE DEALER AND THEY DISCOVERED A DEFECT IN THE ELECTRICAL COMPONENT. THEY REPLACED A FUSE, WHICH CORRECTED THE FAILURE FOR APPROXIMATELY A MONTH, BUT THE FAILURE EVENTUALLY RECURRED. WHEN ALL OF THE LIGHTS ILLUMINATED AGAIN, THEY REMAINED LIT AND LOCKED THE GEARS. THE VEHICLE WAS UNABLE TO BE DRIVEN AND EVEN STALLED WHILE DRIVING 10 MPH. THE CONTACT HAS TAKEN THE VEHICLE BACK TO THE DEALER AT LEAST ONCE PER MONTH AND THEY REPLACED THE FUSE EACH TIME, OR ATTEMPTED TO REPROGRAM THE SYSTEM; HOWEVER, THE REMEDY WAS NEVER PERMANENT. THE VIN WAS UNKNOWN. THE FAILURE MILEAGE WAS 20,500 AND CURRENT MILEAGE WAS 56,000.
NHTSA ODI #10235966
Mileage unknown · Jul 27, 2008
Electrical SystemElectronic Stability Control (esc)
THIS CAR HAS BEEN INTO SERVICE OV 27 TIME IN THE LAST 2 1/2 YEARS REGARDING THE ELECTRICAL SYSTEM/ ALL OF THE LIGHT ON THE DASH BOARD TURN ON. MY LASTEST ISSUE WAS ON THE HIGHWAY MY CAR JUST COMPLETELY TURN OFF ON ME WILL ON THE EXPRESSWAY WHEN I TURNED THE KEY AGAIN THE WARNING LIGHT CAME ON THIS CAR HAS BEEN FIX NUMEROUS TIME…
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THIS CAR HAS BEEN INTO SERVICE OV 27 TIME IN THE LAST 2 1/2 YEARS REGARDING THE ELECTRICAL SYSTEM/ ALL OF THE LIGHT ON THE DASH BOARD TURN ON. MY LASTEST ISSUE WAS ON THE HIGHWAY MY CAR JUST COMPLETELY TURN OFF ON ME WILL ON THE EXPRESSWAY WHEN I TURNED THE KEY AGAIN THE WARNING LIGHT CAME ON THIS CAR HAS BEEN FIX NUMEROUS TIMES BUT THE PROBLEM COMES BACK. *TR
NHTSA ODI #10235901
67,000 miles · Jan 11, 2007
Electrical System
ODOMETER FAILURE. CALLED EXPECTING WARRANTY WAS 8 YEARS 80000 MILES TO BE TOLD WAS NOT COVERED AT DEALERSHIP. WONDERED WHY SOME CARS WERE COVERED WITH UNLIMITED MILEAGE WHICH MAKES SENSE BECAUSE ODOMETER IS VIAL INFORMATION FOR THE LIFE OF THE CAR. SHOULD BE REQUIRED TO MAINTAIN DURING THE LIFE OF THE CAR. *JB
NUMEROUS PROBLEMS WITH EXTERIOR AND INTERIOR LIGHTING. MOST IMPORTANTLY THE LEFT TURN SIGNAL CONTINUALLY GOES OUT WITHOUT NOTICE. SOMETIME THE INTERIOR LEFT TURN LIGHTS UP AND SOMETIMES IT DOESN'T. OTHER TIMES THE INTERIOR LEFT TURN LIGHT GOES COMPLETELY OUT PLACING ME AND MY CHILDREN IN GREAT DANGER. ALSO I MADE A LEFT TURN…
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NUMEROUS PROBLEMS WITH EXTERIOR AND INTERIOR LIGHTING. MOST IMPORTANTLY THE LEFT TURN SIGNAL CONTINUALLY GOES OUT WITHOUT NOTICE. SOMETIME THE INTERIOR LEFT TURN LIGHTS UP AND SOMETIMES IT DOESN'T. OTHER TIMES THE INTERIOR LEFT TURN LIGHT GOES COMPLETELY OUT PLACING ME AND MY CHILDREN IN GREAT DANGER. ALSO I MADE A LEFT TURN AND THE STEERING WENT OUT JUST AS I ENTERED THE BELTWAY AND WAS UNABLE STEER THE VEHICLE. *NM
THIS VEHICLE HAS NUMEROUS DEFECTS, AND HAS BEEN IN FOR SERVICE COUNTLESS AMOUNTS OF TIMES. MB PROMISED TO REPLACE THE VEHICLE IF THEIR FACTORY REPRESENTATIVE COULD VERIFY MY COMPLAINTS. THEY ABSOLUTELY FOUND NUMEROUS, REDUNDANT DEFECTS AND NOW ONLY WANT TO FIX THE VEHICLE, RATHER THAT REPLACE THE VEHICLE. WHAT A BUNCH OF LIARS. …
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THIS VEHICLE HAS NUMEROUS DEFECTS, AND HAS BEEN IN FOR SERVICE COUNTLESS AMOUNTS OF TIMES. MB PROMISED TO REPLACE THE VEHICLE IF THEIR FACTORY REPRESENTATIVE COULD VERIFY MY COMPLAINTS. THEY ABSOLUTELY FOUND NUMEROUS, REDUNDANT DEFECTS AND NOW ONLY WANT TO FIX THE VEHICLE, RATHER THAT REPLACE THE VEHICLE. WHAT A BUNCH OF LIARS. THE VEHICLE HAS ISSUES WITH THE STEERING SYSTEM, THE WHEEL RUBS AND THE POWER STEERING FADES OUT, THE RADIO AND CD CHANGER MALFUNCTION CONSTANTLY, FUMES FROM THE VENTILATION SYSTEM, AND WHEN YOU HIT A BUMP, THE CAR ALMOST GOES OUT OF CONTROL, EVEN THE ESP LIGHT COMES ON. *JB
VEHICLE DESCRIPTION: PASSENGER VEHICLES. THE LEFT FRONT UPPER CONTROL ARM MAY NOT MEET THE SPECIFIED STRENGTH REQUIREMENTS.
Consequence & remedy
Consequence: THE CONTROL ARM COULD FAIL, INCREASING THE RISK OF A CRASH.
Remedy: DEALERS WILL REPLACE THE LEFT FRONT UPPER CONTROL ARM. OWNER NOTIFICATION BEGAN SEPTEMBER 29, 2001. OWNERS WHO TAKE THEIR VEHICLES TO AN AUTHORIZED DEALER ON AN AGREED UPON SERVICE DATE AND DO NOT RECEIVE THE FREE REMEDY WITHIN A REASONABLE TIME SHOULD CONTACT MERCEDES-BENZ AT 1-800-367-6372.
Model-level recall history does not show whether a particular VIN is affected or has received a repair. Check a VIN with NHTSA ↗
NHTSA investigations
1
PE10050 · 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
2002 Mercedes Benz ML320 Problems, Complaints & Recalls | Skip That Year
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