WHILE DRIVING VEHICLE POWER CAN BE LOST & VEHICLE CAN BE STUCK IN 1ST GEAR OR NO GEAR AT ALL CAUSING BLOCKAGE TO TRAFFIC AND POSSIBLY CAUSING AN ACCIDENT. ONCE YOU TURN CAR OFF IT APPEARS THE CAR RESETS ITSELF AS IF NOTHING EVER HAPPEN. WHEN REPORTED TO DEALERSHIP IT WAS STATED NO CODES POP UP SO I MUST BE HITTING THE SHIFT. NOT KNOWING ANY BETTER & NOT BEING A MECHANIC, WHO AM I TO CONTINUE TO…
2006 mercedes-benz SLK-Class powertrain problems
moderate 10 complaints filed with NHTSA · avg repair $2,500
Complaints
10
Recalls
0
Crashes
0
Avg fix
$2,500
What owners are reporting 5 most recent
3 ISSUES--CAMSHAFT SELENOID; DEFECTIVE GEAR IN THE BALANCE SHAFTS OF THE ENGINE; TRANSMISSION VALVE BODY DEFECT. ALL THREE OF THESE ISSUES HAVE BEEN DOCUMENTED BY MERCEDES INTERNAL DOCUMENTS AND THERE IS A CLASS ACTION SUIT ON GOING FOR THE DEFECTIVE GEAR IN THE BALANCE SHAFTS OF THE ENGINE RIGHT NOW. THESE ARE CRITICAL ISSUES AS THE CAR CAN LOSE POWER. WITH REGARD TO THE BALANCE SHAFT ISSUES, …
TL* THE CONTACT OWNS A 2006 MERCEDES BENZ SLK350. WHILE DRIVING AT 45 MPH, THE VEHICLE BEGAN TO DECELERATE INDEPENDENTLY. THE CONTACT STATED THAT THE VEHICLE WAS TURNED OFF AND RESTARTED WHEN SUDDENLY THE VEHICLE JUMPED INTO FIRST GEAR. THE CONTACT ALSO STATED THAT THE VEHICLE WOULD NOT SHIFT FROM THE FIRST GEAR. THE VEHICLE WAS RESTARTED AGAIN AND THE VEHICLE FUNCTIONED AS NORMAL. THE VEHICLE WAS…
WHILE PERFORMING U-TURN IN LIGHT TRAFFIC, TRANSMISSION WOULD NOT SHIFT INTO REVERSE, THEN WOULD ALSO NOT SHIFT INTO DRIVE, LEAVING VEHICLE IMMOBILIZED IN THE MIDDLE OF TRAFFIC. *TT
SEVERE JERK AS VEHICLE DECELERATED AROUND 10-12 MPH. TOOK VEHICLE TO DEALERSHIP AND TEST DROVE WITH TECHNICIAN WHO VERIFIED THE PROBLEM. THERE WERE NO WARNING LIGHTS OR CODES FOUND. I WAS NOTIFIED BY THE DEALERSHIP THAT THERE WAS A SNAP RING FAILURE WITHIN THE GEAR BOX. INVOICE INDICATES "RETAINING CLIP FAILURE INSIDE TRANSMISSION, VERIFIED SEVERE 3-2 DOWN SHIFT, SHORT TEST NO CODES.CHECK OF ADAPT…
Common questions
How serious is the powertrain problem on the 2006 mercedes-benz SLK-Class?
It's a documented issue but not catastrophic. 10 complaints have been filed. Repairs average $2,500 and most owners catch it before it causes a breakdown.
At what mileage does the powertrain typically fail?
Mileage data is limited for this issue. Owners report failures across a wide range, suggesting cause is more about driving conditions and maintenance than mileage alone.
What does it cost to fix?
Independent shops typically charge around $2,500 for powertrain repairs on this vehicle. Dealer pricing tends to run 20-40% higher. The exact figure depends on the specific failure mode, parts availability, and your local labor rates. If you're outside factory warranty, an extended service contract often covers this category.
Are there any recalls related to powertrain?
No active recalls currently cover powertrain issues on this vehicle. The complaints filed represent owner-reported failures that haven't risen to the level of a manufacturer-issued recall — but they're still worth knowing about before you buy or budget for repairs.
Other problem areas on this vehicle
Complaint and recall data sourced from the National Highway Traffic Safety Administration (NHTSA)
public records database. Severity ratings are derived from reported crashes, fires, injuries, and fatalities.
Repair cost estimates are independent-shop national averages and may differ in your area.
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