There are 8 owner-reported powertrain & transmission complaints for the 2005 Mercedes-Benz SLK-Classin NHTSA's database. These are unverified consumer reports and may not reflect confirmed defects.
the conductor plate along with its speed sensor is faulty. Luckily I just exit the highway, the transmission just stopped working, can't drive forward or reverse and when I apply gas on either D or R, just the RPM speed up as if the car is in neutral. I was stranded on the middle of the road. this happened a few time. after turning off the car and turn it back on usually reset it for a little bit. the first time, I have to replace the transmission.
transmission lines popping off popped off at 60 miles per hour tensed me up it stared smoking pushed the safety hazzard lights on and was able to limp it off the highway its happened 3 times after i repaired them afraid to even drive it now.no no no
JUST GOT OFF THE HIGH WAY AND DRIVE ONTO A LOCAL STREET, THE CAR WOULD NOT SHIFT INTO ANY GEAR FORWARD OR REVERSE. END UP HAVING TO TOW THE CAR. LUCKILY IT DIDN'T HAPPEN WHILE I WAS AT THE HIGHWAY. *TR
FIRST INCIDENT I WAS DRIVING DOWN A MOUNTAIN (MALIBU CANYON ROAD) AROUND 10:30PM AND THE AUTOMATIC TRANSMISSION WENT OUT OF GEAR BY ITSELF AND I HAD NO FORWARD CONTROL. THE ENGINE REVVED BUT THE TRANSMISSION WAS NOT ENGAGED. I WAS GOING DOWNHILL BUT IT TOOK ME AWHILE TO FIND A PLACE TO PULL OFF THE ROAD. THERE WAS NO CELLPHONE SERVICE IN THAT LOCATION SO I WAITED FOR A FEW MINUTES TO FLAG SOMEONE DOWN. NO ONE CAME BY SO I RESTARTED MY CAR AND WAS ABLE TO GET IT BACK INTO GEAR. THE SECOND INCIDENT MY WIFE AND I WERE DRIVING ON THE 101 FREEWAY AT APPROXIMATELY 65MPH AND THE TRANSMISSION DISENGAGED FROM DRIVE AND WENT INTO NEUTRAL WITHOUT ANY WARNING. WE NEARLY GOT REAR ENDED AND BY LUCK WERE ABLE TO COAST TO AN OFF RAMP. UPON REACHING THE BOTTOM OF THE OFF RAMP, I TURNED OFF THE ENGINE AND WAITED A MINUTE AND UPON RESTARTING THE ENGINE I WAS ABLE TO REENGAGE IT IN DRIVE. THE THIRD TIME BEFORE I DECIDED TO BRING IT TO THE MERCEDES DEALER, I WAS DRIVING IN TRAFFIC ON THOUSAND OAKS BLVD. AND EXPERIENCED THE SAME PROBLEM. I HAD TO PULL OVER INTO THE RIGHT LANE, CURB THE CAR AND SHUT OFF THE MOTOR. AFTER A FEW MINUTES I RESTARTED THE CAR AND WAS ABLE TO BUT IT BACK INTO GEAR. ALL OF THESE INCIDENTS TOOK PLACE WITHIN A 1 1/2 MONTH PERIOD AND I CANNOT TRUST THE CAR TO BE SAFE ANY LONGER WITH THIS CONDITION. *TR
[XXX] 2005 SLK 350 I HAVE A MANUAL TRANSMISSION IT IS HARD TO GET INTO FIRST GEAR FROM NEUTRAL WHERE IT SLIPS INTO REVERSE. THE DEALER HAS NOT SO FAR BEEN ABLE TO DUPLICATE THIS. I FOUND ONLINE THAT THERE IS A TSB ON THIS. THEY SAY UNLESS THE CAN DUPLICATE THIS THEY WILL NOT PROCEED WITH IT. I INFORMED THE DEALER EARLIER THAT I HAD A WRITTEN NOTE FROM MY FRIEND WHO WAS WITH ME ONCE WHEN IT HAPPENED, THEY DID NOT CARE. TSB TELLS THE DEALER IF YOU RECEIVE CUSTOMER REPORTS IN THE ABOVE MODEL VEHICLES OF FIRST OR REVERSE GEARS BEING DIFFICULT TO ENGAGE FROM NEUTRAL AND/OR THE SHIFTER CATCHING BETWEEN GEARS DURING THE UPSHIFT, THIS MAY BE DUE TO INSUFFICIENT LUBRICATION OF THE TRANSMISSION INPUT SHAFT NOT ALLOWING THE CLUTCH DISC TO MOVE FREELY. THIS IS A DANGEROUS SITUATION THAT HAPPENED FIVE TIMES. MERCEDES HAD THERE REGIONAL REP LOOK AT THE CAR AND HE COULD NOT DUPLICATE IT FOR THE SHORT DRIVE HE DID. THE TECH STATED THE SAME BUT THEN THIS IS THE SAME TECH WHO CLAIMED HE FIXED TWO OTHER PROBLEMS THAT WERE STILL A PROBLEM AS NOTED BY THE REGIONAL REP. ON THE WAY HOME FROM THE DEALER, SARASOTA MERCEDES THE CAR DID THE SAME GOING INTO REVERSE AT A LIGHT FROM NEUTRAL AND I JUST MISSED AN ACCIDENT BACKING UP WHEN THE LIGHT CHANGED WHILE THE CAR BEHIND ME WENT FORWARD. I WAS SO UPSET BY THIS I TRADED IN THE CAR ON THE WAY HOME KNOWING THAT THE DEALER AND MERCEDES HAD NO INTENTION OF RECTIFYING THIS KNOWN PROBLEM AS SHOWN BY THE TSB. MERCEDES AND THE DEALER REFUSED TO APPLY THE TSB BUT THEY REFUSED AND LET ME DRIVE AWAY WITH AN UNSAFE VEHICLE WITH AN ACCIDENT WAITING TO HAPPEN. THIS IS INCOMPETENCE ON BOTH OF THEIR PARTS. THIS IS THE TSB NUMBER: P-26-50-02TITLE: MANUAL TRANS - FIRST OR REVERSE GEAR DIFFICULT TO ENGAGE. IT USED TO BE ON THE INTERNET BUT AFTER I WROTE TO THE PRESIDENT/CEO, GENERAL MANAGER CUSTOMER SERVICE AND THE VP OF SALES AND MARKETING IT WAS REMOVED, THAT WAS THEIR RESPONSE TO MY PROBLEM. *NM UPDATED 07/11/2012 *JS INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
I BOUGHT A CAR IN DECEMBER OF 2004 FROM MERCEDES BENZ AND NEVER HAD ANY PROBLEMS UNTIL A YEAR LATER. I STARTED TO GET TRANSMISSION PROBLEMS, THE CAR WOULD START JERKING WHEN I COME TO A STOP, AND THE RPM ON THE CAR WOULD GO HIGHER THAN NORMAL WHEN I STEP ON THE GAS PETAL AFTER COMING TO A COMPLETE STOP. I HAVE BROUGHT THE CAR INTO AUTOBAHN NUMEROUS OF TIMES TO TRY AND GET THIS PROBLEM FIXED, BUT THE PROBLEM KEEPS OCCURRING AND NEVER SEEMS TO BE FIXED COMPLETELY. THE FIRST TIME AROUND THEY HAD REPLACED MY TRANSMISSION, AND FIXED THE TAP THREADS ON THE NEW TRANSMISSION HOUSING, THE SECOND TIME AROUND THEY UPDATED OUR SOFTWARE AND CONTROL UNIT, AND THE THIRD TIME THEY CHECKED OUR CONTROL UNIT, INSTALLED A ELECTROHYDRAULIC CONTROL UNIT, THE FORTH TIME AROUND THEY DID A ADAPTATION PERFORM, AND CHECKED OUR OIL LEVEL, SOFTWARE, BATTERY CHARGER, AND THEN THE FIFTH TIME THEY INSTALLED A NEW ELECTROHYDRAULIC CONTROL UNIT, AND DID ANOTHER ADAPTATION PERFORM AND THAT DID NOT WORK SO THEY REPLACED OUR TRANSMISSION AGAIN, AND NOW IT'S STILL NOT FIXED. *TR
DT*: THE CONTACT STATED WHILE TRAVELING 50MPH AND ACCELERATING THE VEHICLE GOES TO NEUTRAL AND LOOSES POWER. THE VEHICLE MUST BE PUT INTO PARK, TURNED OFF AND RESTARTED TO REGAIN POWER. THERE IS NOT A DELAY FROM THE TIME IT IS TURNED OFF UNTIL START UP. THE VEHICLE HAS STALLED A TOTAL OF THREE TIMES. THE DEALERSHIP HAS BEEN ALERTED AND REPLACED THE TRANSMISSION CONTROL MODULE ETC ON MAY 16TH, THE PROBLEM RETURNED ON MAY 27, 2006. THE DEALERSHIP HAS BEEN UNABLE TO SUCCESSFULLY CORRECT THE PROBLEM. THE CONTACT HAS BEEN IN TOUCH WITH A SERVICE ADVISOR WHO EXPLAINED THEY NEED TO SPEAK WITH SOMEONE REGARDING THE ISSUE BEFORE THEY INSPECT THE VEHICLE AGAIN. THE VEHICLE HAS NOT BEEN INSPECTED BY THE SALES DEALER BECAUSE OF THE DISTANCE TO THE REPAIR SHOP. THE SALES DEALER INSTRUCTED THE CONTACT TO TAKE THE VEHICLE TO ANOTHER SERVICE DEALER NEAR THE CONTACT'S RESIDENCE. THE MANUFACTURER HAS NOT BEEN ALERTED. THE VEHICLE IS A CLK320.*AK
4/3/2007. 2005 MERCEDES BENZ SLK 350. CONSUMER STATES THAT OCCASIONALLY WHEN THE VEHICLE IS IN NEUTRAL AT A STOP LIGHT IT IS EXTREMELY HARD TO GO INTO FIRST GEAR. *MC THE CONSUMER STATED HE SOMETIMES HAS TO APPLY ADDITIONAL PRESSURE ON THE STICK, AND WHEN DOING SO THE STICK GOES INTO REVERSE. THE PROBLEM HAPPENED INTERMITTENTLY, THEREFORE, THE DEALER WAS UNABLE TO DUPLICATE THE CONSUMERS COMPLAINT. A TSB HAD BEEN ISSUED FOR THE EXACT PROBLEM THE CONSUMER WAS EXPERIENCING. *JB
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