2002 MERCEDES BENZ C320 Electrical System Problems

Battery drains after being parked overnight, 58,000 miles, dealer maintained since new. Driven by a little old lady until I bought it. Took it to the dealer and they replaced one of the seat modules. Soon afterward, the problem recurred. Took it back to the dealer and they said it was a defective fuse box and replaced it for $650. Went to pick up the car and the battery was dead again. After some complaining, they refunded the bill. They looked at it again and said the problem was somewhere in the dashboard and it would cost $2300 just to take it apart and look for a bad module. They offered $2300 trade in toward a new or CPO car, and said my car would be sent to the crusher. I took the car back and installed a remote operated battery cutoff, and have been driving it ever since. Other...

While changing one of the lights in the headlight housing, I found the wiring's insulation rotting off all the wires, exposing the bare copper presenting a fire hazard.

TL* THE CONTACT OWNS A 2002 MERCEDES BENZ C320. THE CONTACT STATED THAT THE BATTERY WAS DRAINED AFTER THE VEHICLE WAS PARKED AND TURNED OFF. THE VEHICLE FAILED TO RESTART. THE VEHICLE WAS TAKEN TO AN INDEPENDENT MECHANIC TO BE DIAGNOSED. THE CONTACT WAS INFORMED THAT THE DRIVER'S SIDE SEAT MODULE WAS DEFECTIVE WHICH CAUSED THE BATTERY TO DRAIN. THE MODULE WAS UNPLUGGED TO PREVENT THE BATTERY FROM BEING DRAINED. THE MANUFACTURER AND LOCAL DEALER WERE NOT NOTIFIED OF THE FAILURE. THE FAILURE MILEAGE WAS 114,000.

BATTERY DRAINING

WAS DRIVING ON HIGHWAY WHEN ESP, BAS AND ABS LIGHTS SHOW UP, AND SPEEDOMETER DISPLAY STOPS WORKING - SPEED READING GOES TO ZERO, THOUGH THERE IS NO REDUCTION IN SPEED. GET TO DESTINATION. ON RETURN IT HAPPENS AGAIN. THIS TIME I GO TO REST AREA, STOP THE CAR, REMOVE THE KEY AND RESTART. THE CAR REFUSES TO MOVE OUT OF PARK. CALL ROADSIDE ASSISTANCE AND GET INSTRUCTION TO OVERRIDE PARK, DRIVE HOME WITH FLASHERS ON - VERY ROUGH RIDE QUALITY. TOW TO DEALER NEXT DAY, THEY ARE NOT SURE IF NEW PART WILL FIX IT, EVEN IF $1850 PART IS REPLACED. LOTS OF ELECTRICAL PROBLEMS OVER THE YEARS. TURN LIGHTS GO OUT ROUTINELY. CHANGED CD CHANGER. SEAT DRAINS BATTERY,HAD TO DISCONNECT IT. POOR ELECTRICAL SENSORS ALL AROUND. NOW IT ALSO HAS RUST DAMAGE, ALL OF A SUDDEN, AT THE BOTTOM OF DOORS.

TL*THE CONTACT OWNS A 2002 MERCEDES C320. THE CONTACT STATED THAT THE VEHICLE WOULD NOT START. THE CONTACT MENTIONED THAT AFTER AN HOUR, THE VEHICLE WAS ABLE TO START. THE VEHICLE WAS NOT DIAGNOSED OR REPAIRED. THE FAILURE MILEAGE WAS 123,384.

THERE HAVE BEEN TWO WARNING LIGHTS FOR REAR LIGHTS AND AFTER DRIVING FOR 4 HOURS, A WARNING CAME ON FOR ELECTRICAL STABILITY AND MY CAR QUIT WORKING COMPLETELY. THERE WAS A BURNING SMELL AND I HAD TO RESTART IT. I AM VERY CONCERNED ABOUT THIS. *TR

TL* THE CONTACT OWNS A 2002 MERCEDES C320. THE CONTACT STATED HE HAD TO REPLACE THE BATTERY IN THE VEHICLE SEVERAL TIMES. THE DEALER STATED THE SEAT CONTROLS FOR THE PASSENGER SEAT DRAINED THE BATTERY AND THE SEAT CONTROL MODULE NEEDED TO BE REPLACED. THE FAILURE MILEAGE WAS 89,000 AND THE CURRENT MILEAGE 90,904. *TR

I CAME OUT AND MY BATTERY WAS DEAD WITHOUT WARNING. I TOOK THE VEHICLE TO DOWNTOWN LA MOTORS(MERCEDES BENZ) DEALER, WHERE THEY EXPLAINED THAT THE SEAT CONTROL MODULES WERE STAYING ON AND CAUSING THE BATTERY TO DRAIN. I SUBSEQUENTLY HAD TO UNHOOK THE SEAT CONTROLS AND NOW I AM UNABLE TO MOVE MY SEATS OR STEERING WHEEL. THEY ESTIMATED THAT THE REPAIR WOULD COST AROUND 1500. NUMEROUS CUSTOMERS HAVE THE SAME ISSUE ON THE SAME VEHICLE, IT IS OBVIOUS THAT THIS IS A MANUFACTURER DEFECT AND NOT THE FAULT OF MERCEDES BENZ CONSUMERS. *TR

ON 1/14/2012 CAR WONT START BATTERY DEAD, CALL AAA TOW TRUCK. JUMP BATTERY OK USED CARED NEXT DAY AND ON FAUL COME UP ON MY CARS TROULBE SCREEN TO INDICATED THAT I HAD ANY OTHER TROUBLE IN ANY SYSTEM IT THE CAR, WE WHEN TO FL ON THE ON THE 16 OF JANUARY CAR WAS HOME (IN NY) SON WAS GOING TO TAKE OF HOUSE AND START CAR ONCE A WEEK. RECEIVED PHONE CALL FROM MY SON ON 1/17/2012 CAR WONT START,BATTERY DEAD, AND KEY WONT TURN. ON 4/21/2012 COME HOME FROM FL FROUND DEAD CAR AND TRANSMISTION LEAKING.CALLED MERCEDES BENZ FOR A TOE TO THE SHOP.THIS IS THR THIRED BATTERY SINCE A HAVE THIS CAR.BATTERY WAS UNDER WARRANTY.IT WAS CHANEG LEST THEN A YEAR AGO. M/B SHOP INFORMED ME BATTERY WAS DEAD. CAUSE MY SEAT MODULES SHORTED, TO REPLACE MODULES WAS COST $1200. I FEEL THAT THE BATTERY CAUSE...

I HAVE A 2002 MERCEDES C320. MY BATTERY IS DEAD AFTER SEATING OVERNIGHT. TOOK THE CAR TO THE AUSTIN MB DEALERSHIP TO DIAGNOSE THE PROBLEM. I WAS TOLD THAT THE POWER SEAT MOTOR IS DRAINING MY BATTERY. BOTH SEATS. COME TO FIND OUT THAT MANY OTHER PEOPLE HAVE EXPERIENCED THE SAME PROBLEM. I CALLED MERCEDES USA AND THEY SAID THAT SINCE THE CAR IS OUT OF WARRANTY, THERE IS NOT MUCH THEY CAN DO. THAT IS BULL!! OBVIOUSLY SINCE SO MANY PEOPLE WITH THIS CAR MODEL HAVE THE SAME PROBLEM, IT HAS TO BE A MANUFACTURER FAULT. I WAS WONDERING HOW MANY PEOPLE NEED TO EXPERIENCE THIS PROBLEM BEFORE MERCEDES WILL ADMIT THAT THEY HAVE A BAD COMPONENT ON THIS MODEL. I FIGURED,IF ENOUGH PEOPLE CALL AND TELL MB THAT THEY HAVE THIS SAME PROBLEM, THEY WILL REALIZE THAT THIS IS A DEFECTIVE PART AND THEY WILL ISSUE A RECALL...

TL* THE CONTACT OWNS A 2002 MERCEDES BENZ C320. THE CONTACT STATED THAT THE BATTERY CONTINUED TO FAIL EACH TIME THE VEHICLE WAS STARTED. THE VEHICLE WAS TAKEN TO THE DEALER WHO ADVISED THAT THE SEAT MODULE WAS DRAINING THE BATTERY THAT WAS LOCATED UNDER THE FRONT DRIVER AND PASSENGER SEATS. THE CONTACT STATED THAT HE HAD TO PURCHASE TWO BATTERIES WITHIN FOUR MONTHS DUE TO THE RECURRING FAILURE. THE MANUFACTURER WAS NOT CONTACTED IN REGARDS TO THE FAILURE. THE FAILURE MILEAGE WAS 97,000.

I HAVE A 2002 MERCEDES C-320 CAR THAT THE BATTERY WILL NOT HOLD A CHARGE! I HAD THE MERCEDES DEALER COME TO MY HOME AND PUT IN A NEW BATTERY. AFTER SPENDING $300 AND 2 DAYS LATER THE NEW BATTERY WAS DEAD. I WAS TOLD IT COULD BE THE ALTERNATOR/REGULATOR BY THE MB DEALER AND THE COST WOULD BE $1,200. I TOOK IT TO MY LOCAL MECHANIC, WHO WORKS ON FOR. CARS, AND THEY REPLACED THE ALTERNATOR/REG. FOR $512 OUT THE DOOR. 2 DAYS LATER THE BATTERY WAS DEAD AGAIN. I WAS TOLD MY NEW MERC. BATTERY WAS NOT GOOD AND THEY REPLACED IT. 7 DAYS LATER MY BATTERY DIED AGAIN. MY LOCAL MECH. TOLD ME TO TAKE IT BACK TO THE MB DEALER AS THERE SEEMS TO BE A PROBLEM WITH THEIR MODULE AND THEY SHOULD REPLACE IT FOR FREE AS THROUGH HIS RESEARCH MANY INDIVIDUALS ARE HAVING THE...

LEFT AND RIGHT ELECTRONIC SEAT MODULES WHICH ALSO CONTROLS THE STEERING WHEEL AND OTHERS FAILED AND MB DID NOT WANT TO ACCEPT THE RESPONSIBILITY PART NUMBERS ARE: 2118704626 2118704726. *TR

AT 45,000 MILES FRONT PASSENGER SEAT STARTED DRAINING THE BATTERY. DEALER TOLD BAD CONTROL UNIT. BECAUSE OF HIGH COST OF REPAIR ($900.), IT HAS BEEN DISCONNECTED. THE CONTROL UNIT WAS LEAST UTILIZED FOR THE PASSENGERS SEAT. THIS SHOULD NOT HAVE FAILED UNDER 45000 MILES USE. *TR

2002 C320 MERCEDES BENZ ELECTRICAL SEATS DRAINING BATTERY. *TR

MERCEDES BENZ 2002, C320 *STEERING WHEEL MALFUNCTION *SRS WARNING *SEATS MALFUNCTION *BRAKE AND OIL FLUID MISLEADING INFO *BATTERY DRAIN *TURNING SIGNALS REQUIRING NEW HARNESS THAT COST A LOT $$$. *TR

SEAT CONTROL UNITS DRAINING THE BATTERY IF CAR IS PARKED. CAR WILL NOT START IF PARKED FOR MORE THEN 24H. DRAIN AMPS BETWEEN 1.2 AND 1.4 AMPS. HAD TO DISCONNECT THE SEAT MODULES, NOW SEATS CAN'T BE ADJUSTED. *TR

CAR STALLED IN THE MIDDLE OF THE ROAD AND ALMOST CAUSED AN ACCIDENT. AFTER 15 MINUTES, CAR STARTED BACK. I HAD IT DIAGNOSED AND A MODULE WAS REPLACED. 2 MONTHS LATER, THE BATTERY STARTED DRAINING. I HAD THE ALTERNATOR REPLACED AND THE BATTERY TWICE. CAR WILL WORK FOR A DAY OR TWO AND DIES AGAIN. SO MANY OTHER MERCEDES OWNERS OF C320 ARE HAVING THE SAME PROBLEM. BATTERY DYING AND CAR STALLING. *TR

BATTERY DRAINING, OFFICIAL DEALERSHIP IS UNABLE TO IDENTIFY WHAT IS CAUSING DRAIN. *TR

BATTERY GOES DEAD AFTER A FEW DAYS: MAJOR CAUSE IS ELECTRICAL POWER DRAIN DUE TO FAULTY UNITS, MAJOR CAUSE BUT NOT ONLY CAUSE IS THE SEAT CONTROL MODULE UNIT. QUICK FIX IS TO DISCONNECT TO ELIMINATE POWER DRAIN BUT THIS CAUSES OTHER SAFETY FEATURES TO GO DORMANT. I HAVE READ MORE THAN 100 REPORTS ON BENZWORLD.ORG ON THE VERY SAME ISSUE WITH LITTLE OR NO SOLUTION FROM DEALERSHIPS. ITS A MAJOR AND COMMON PROBLEM AND SHOULD BE RECALLED BEFORE PEOPLE GET HURT. *TR

2002 MERCEDES BENZ C320 STATION WAGON: FAILURE TO KEEP A CHARGE IN THE BATTERY, AND APPARENTLY THE SOLUTION IS TO DISCONNECT THE POWER SEATS AND THEN RECHARGE THE BATTERY. BUT THEN THE POWER SEATS ARE INOPERABLE, UNLESS YOU GET THESE REPLACED. APPARENTLY, THIS IS A COMMON PROBLEM. *TR

THE BATTERY IN MY 2002 MERCEDES BENZ C320 DIED IN LATE FEBRUARY 2008. DIAGNOSTICS WERE DONE AND THE BATTERY WAS REPLACED BY BY CHANDLER MERCEDES BENZ VIA ROADSIDE SERVICE. IN LATE MARCH I GOT INTO THE CAR TO GO TO WORK AND THE BATTERY WAS DEAD; CALLED ROADSIDE SERVICE. CHANDLER MB ARRIVED AND JUMP-STARTED THE CAR. MAY 5TH I GOT IN MY CAR TO GO TO WORK AND AGAIN, THE BATTERY WAS DEAD. CHANDLER MB ROADSIDE SERVICE AGAIN JUMP-STARTED THE CAR WHICH WAS THEN DELIVERED TO THEIR SERVICE DEPARTMENT. THE BATTERY WAS CHECKED AND THERE WAS NOTHING WRONG WITH IT. FURTHER DIAGNOSTICS REVEALED THAT THE DRIVER'S SIDE POWER SEAT MODULE WAS DRAINING THE BATTERY. I REQUESTED A BATTERY THAT COULD POWER THE CAR. WAS TOLD THERE IS NO BATTERY THAT WILL POWER THE CAR, THE POWER SEAT MODULE MUST BE REPLACED TO THE TUNE OF $398.00 PLUS LABOR. I DID...

BOTH INTERNAL SEAT CONTROL MODULES HAVE ELECTRICAL FAULT. TEST CODE 8E3L-K8NNQ. FOUND 1.66 AMP OF DRAW (OUT OF SPEC. RANGE) AMP DROP WHEN DISCONNECTED: PASSENGER SIDE TO: .1114 AND DRIVER SIDE: 0.59 MILLIAMPS. 1/13 ALARM SOUNDS AND BATTERY DIES. TECHNICIAN REPLACES BATTERY, BUT WARNS LIKELY TO HAPPEN AGAIN-MANY CASES. 1/16 SAME PROBLEM. CAR TAKEN TO OTHER M-B DEALERSHIP. DIAGNOSED AS ABOVE. REPLACED BOTH MODULES 1/25. DEALERSHIP HAD TROUBLE GETTING PART DUE TO UNUSUALLY HIGH VOLUME FOR THIS REPAIR. 18 MODULES GONE OR ON RESERVE IN ONE WEEK IN SANTA MONICA ALONE. MERCEDES CORPORATE OFFICE UNRESPONSIVE. CARMAX DENIES KNOWN FAULT, BUT REPORTS CUSTOMER WITH SAME COMPLAINT PREVIOUS WEEK. *NM

2002 C320 MERCEDES BENZ WAGON CAR STALLED IN TRAFFIC WITHOUT WARNING IN CENTER LANE ON BUSY STREET -- AND WOULD NOT RESTART LEAVING CAR AND OCCUPANT VULNERABLE TO CRASH-- DUE TO FAILURE OF CRANK POSITION SENSOR. *JB

THE TRANSMISSION HAS REPEATEDLY LOCKED IN 2ND GEAR. THE ELECTRICAL SYSTEM SHOWS CONSTANT LIGHT, COOLANT AND AIR BAG FAILURES. THE MEMORY FOR SEATS, MIRRORS AND THE STEERING WHEEL DEFAULTS ABOUT 30% OF THE TIME. I BOUGHT THIS CAR THROUGH M-B DIPLOMATIC SALES PROGRAM WHILE SERVING IN CANADA AND BROUGHT IT TO THE USA ON RETIREMENT. M-B CANADA WON'T HELP BECAUSE THE CAR IS IN THE US. M-B USA WON'T HELP BECAUSE I BOUGHT THE CAR IN CANADA. M-B CORPORATE IN GERMANY SIMPLY REFERRED MY CASE BACK TO M-B USA. I AM NOW OUT OF WARRANTY. I WANT M-B TO EXTEND THE WARRANTY ANOTHER 4 YEARS OR 50K MILES. THE CAR IS A DISASTER. *JB

THE C ONSUMER STATED THE VEHICLE STALLED. THE CONSUMER TRIED TO RESTART THE VEHICLE BUT WAS UNABLE TO DO SO. THE CONSUMER CALLED FOR ROAD SIDE ASSISTANCE . THE TECHNICIAN REPLACED THE BATTERY. THE CONSUMER STARTED UP THE VEHICLE AND DROVE IT HOME. THE NEXT DAY THE VEHICLE FAILED TO START UP. THE CONSUMEER HAD THE VEHICLE TOWED TO THE DEALER FOR INSPECTION. THE MECHANIC INFORMED THE CONSUMER THAT THE VEHICLE WAS PLACED ON A DIAGNOSTIC. THE DRIVER INFORMED THE MECHANIC THAT THIS PROBLEM HAS OCCURRED MORE THAN ONCE AND THE PROBLEM HAS NOT BEEN RESOLVED. PLEASE FILL IN ADDITIONAL INFORMATION. *JB

CONSUMER STATES THERE ARE PROBLEMS CONCERING THE ESP AND BAS SYSTEMS WARNING MESSAGES THAT ARE APPEARING ON THE MONITOR, WHEN TRAVELING AT A MODERATE RATE OF SPEED IN A STRAIGHT LINE, THE VEHICLE LOSES ALL POWER ALONG WITH BRAKING SENSATION.*JB

DRIVERS SIDE AND PASSENGER SIDE AIRBAGS FAILED TO DELPOY DURING A FOURTY-FIVE PER HOUR FRONT COLLISION, DEALER HAS YET TO BE CONTACTED.*AK CONSUMER STATED THE TEL-AID ALSO FAILED TO OPERATE, IN WHICH IT WAS UNABLE TO BRAKE THE VEHICLE.*SLC