DT: THE CONTACT STATED THE CAR WAS BURNING AN EXCESSIVE AMOUNT OF OIL. THE VEHICLE USED TWO QUARTS OF OIL AT ONLY 5, 500 MILES. THE DEALERSHIP TEST DROVE THE VEHICLE AND FOUND THAT THE VALVES WERE NOT SEATED. ALSO, AT TIMES WHILE PRESSING THE ACCELERATOR PEDAL THE VEHICLE WILL NOT MOVE IT WILL ONLY REV THE ENGINE. THE DEALERSHIP WAS CONTACTED, THEY TOLD HER THE NEXT TIME THIS OCCURRED TO SHUT THE …
2005 mercedes-benz SLK-Class engine problems
severe 6 complaints filed with NHTSA · avg repair $3,100
Complaints
6
Recalls
0
Crashes
1
Avg fix
$3,100
What owners are reporting 4 most recent
TOOK MY CAR IN, IT WOULD NOT GO INTO REVERSE, THEN THE ENGINE WAS WINDING OUT REALLY HI ON THE TACHOMETER, MERCEDES SAID IT WAS THE VALVE BODY MODULE IN TRANSMISSION, OK- THEN THEY TOLD ME MY ENGINE BALANCE SHAFT WAS NOT WORKING AND THE LABOR WAS 5628.00 THEY HAVE NOT YET QUOTED ME A PRICE ON THE PARTS FOR EITHER ISSUE. SAID THE ENGINE WILL JUST SEIZE UP WHEN DRIVING, I LOOKED THIS UP ON INTERNET …
EXCESSIVE OIL CONSUMPTION 7 - 8 QUARTS IN 6800 MILES . *NM
improper heat treatment of the balance shaft spocket causing the balance shaft to worn out resulting in advance timing of the CAM. Mercedes acknowledges it's an known issue but don't cover cost of fixing it. Once ecu detected timing is off, it will stop the transmission from accelerating without any warning. Happened to me on a highway, good thing the car still have some momentum and was able …
Common questions
How serious is the engine problem on the 2005 mercedes-benz SLK-Class?
It's a meaningful issue. 6 complaints have been filed and the failure mode causes operational problems for owners. Repairs average $3,100.
At what mileage does the engine 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 $3,100 for engine 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 engine?
No active recalls currently cover engine 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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