2014 MERCEDES-BENZ SLK-Class M271 DE18 AL (200 CGI)/M278 DE30 LA (SLK 350) (R172)

Engine identity

Oils and fluids

Service and parts data

Common and chronic problems

• Variable valve timing actuator wear on M271 engines
• Balance shaft wear on early V6 engines
• Turbocharger wear on diesel OM651 in high-mileage examples

First checks

• Inspect valve timing chain and actuator noise
• Check for oil leaks from camshaft seals
• Verify condition of convertible roof operation system

Antes de cambiar piezas

• Save fault codes and freeze-frame data before clearing anything.
• Check engine oil, coolant and transmission fluid using the correct temperature and service procedure.
• Verify power, ground, connectors, hoses, leaks and live data before replacing expensive parts.

Important notes

• Market variations affect available engines, e.g. diesel rarely available in North America.
• Oil capacity and service fill volumes vary slightly with engine and oil filter version.