There are 4 owner-reported powertrain & transmission complaints for the 2006 Mercedes-Benz CLK-Classin NHTSA's database. These are unverified consumer reports and may not reflect confirmed defects.
TL* THE CONTACT OWNS A 2006 MERCEDES BENZ CLK350. THE CONTACT STATED THAT THE VEHICLE REDUCED IN SPEED WHEN THE ACCELERATOR PEDAL WAS APPLIED. THE CONTACT MENTIONED THAT THE ACCELERATOR PEDAL HAD TO BE DEPRESSED NUMEROUS TIMES IN ORDER TO ACCELERATE, WHICH RESPONDED INTERMITTENTLY. THE CONTACT WAS ABLE TO RESTART THE VEHICLE IN ORDER TO RESET THE COMPUTER. THE VEHICLE WAS TAKEN TO AN AUTHORIZED DEALER ON SEVERAL OCCASIONS WHERE THE FAILURE WAS UNABLE TO BE REPLICATED. THE VEHICLE WAS TAKEN TO AN INDEPENDENT MECHANIC, WHO DIAGNOSED THAT THE TRANSMISSION VALVE HOUSING NEEDED TO BE REPLACED. THE VEHICLE WAS REPAIRED. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 70,000.
TL* THE CONTACT OWNS A 2006 MERCEDES BENZ CLK350. WHILE DRIVING AT 20 MPH, THE VEHICLE SEEMED TO BE IN THE INCORRECT GEAR AND DROVE SLUGGISHLY. AFTER A MILE OR SO, THE VEHICLE WOULD HAVE TO BE SHIFTED INTO PARK AND BACK INTO THE DRIVE POSITION TO GET THE VEHICLE TO OPERATE NORMALLY. THE CONTACT STATED THAT THIS WAS A RECURRING INCIDENT. THE VEHICLE WAS NOT DIAGNOSED OR REPAIRED. THE MANUFACTURER WAS NOT MADE AWARE OF THE ISSUE. THE FAILURE MILEAGE WAS 68,000.
MY TRANSMISSION INTERMITTENTLY GOES INTO LOW GEAR WHILE DRIVING AT FREEWAY SPEEDS. THE CAR SUDDENLY SLOWS DOWN WITHOUT THE BRAKE LIGHTS TO WARN TRAFFIC BEHIND ME. IF I PULL OVER & TURN THE ENGINE OFF & BACK ON, THE TRANSMISSION WILL SHIFT GEARS NORMALLY FOR A FEW DAYS. THE MERCEDES DEALER SAYS THERE IS NO PROBLEM & NO OTHER CARS DO THIS. NOW THE CHECK ENGINE LIGHT IS ON & THE TRANSMISSION WON'T CHANGE GEARS AT ALL. NOW THE DEALER SAYS THE TRANSMISSION MUST BE REPLACED FOR $6500. A INDEPENDENT MERCEDES REPAIR SHOP TOLD ME THAT MERCEDES MAKES A NEW TRANSMISSION VALVE BODY / ELECTRONIC CONTROL UNIT, TO FIX MY PROBLEM, FOR $4500 LESS THEN THE DEALER PRICE. HOWEVER, MERCEDES SENT A POLICY LETTER TO THEIR DEALERS ON 4/15/11 THAT SAYS MERCEDES WILL NOT SELL VALVE BODIES / ECU FOR MY TRANSMISSION TO INDEPENDENT REPAIR SHOPS. THE MERCEDES 4/15/11 LETTER REFERS TO A POLICY DOCUMENT TRP POLICY # PAC003 TO JUSTIFY NOT SELLING THE PART TO NON DEALERS. THIS DOCUMENT DEFINES THEIR RULES FOR SELLING THEFT RELATED PARTS. I READ THE DOCUMENT "PAC003", & IT ONLY SAYS THE INDEPENDENT REPAIR SHOP MUST PROVIDE DOCUMENTS THAT PROVE OWNERSHIP. MERCEDES IS IN CLEAR VIOLATION OF MULTIPLE LAWS & REGULATIONS. MERCEDES FORCES ME TO PAY A MUCH HIGHER PRICE TO THEM TO REPAIR THE "CHECK ENGINE" LIGHT & THE TRANSMISSION FAILURE. I THINK THIS IS CALLED A "MONOPOLY"! THEY USE THE "ANTI THEFT PART" AS AN EXCUSE TO CHARGE ME AN EXTRA $4500. THIS IS OUTRAGEOUS! I'M NOT WORRIED ABOUT SOMEONE STEALING MY CAR. I'M WORRIED ABOUT BEING KILLED BY ANOTHER VEHICLE CRASHING INTO ME FROM BEHIND BECAUSE THE TRANSMISSION SUDDENLY SHIFTS INTO LOW GEAR. I'VE BARELY AVOIDED AN ACCIDENT ON SEVERAL OCCASIONS. I SPOKE WITH MANY OTHER OWNERS AT THE DEALERSHIP, & THEY WERE ALL HAVING THE SAME PROBLEM WITH THEIR CARS. IT IS TIME FOR THE NHTSA TO STOP MERCEDES GOUGING CUSTOMERS. *JS
DRIVING HOME ON FREEWAY AT NIGHT, CAR SHIFTED UNEXPECTEDLY AT HIGH SPEED. CHECK ENGINE LIGHT IMMEDIATELY CAME ON. CAME TO STOP EXITING OFF FREEWAY AND CAR WOULD NOT MOVE, TURNED OFF AND TURNED BACK ON ENGINE WAS ABLE TO LIMP HOME WITH CHECK ENGINE LIGHT STILL ON. TOWED TO MERCEDES AND WAS TOLD IT WAS A "DEFECTIVE" SPEED SENSOR ALSO WAS TOLD THIS MALFUNCTIONING SENSOR COULD NOT BE REPLACED IN AND OF ITSELF AND THAT THE WHOLE VALVE BODY WOULD HAVE TO BE REPLACED AT A COST OF $2200 FOR A 2006 CAR WITH 58,000 MILES ON IT. BY VIRTUE OF THE FACT THE SENSOR WAS DEFECTIVE SHOULDN'T MERCEDES HAVE REPLACED THIS AT THEIR COST? "TRANSMISSION ELECTROHYDRAULIC UNIT REPLACED AT A COST OF $2200 WITH 58,000 MILES" *TR
Complaints are unverified consumer reports submitted to NHTSA. A high complaint count may reflect vehicle popularity, not defect severity. Data sourced from NHTSA public records.
Data synced from NHTSA on Apr 26, 2026