2014 MERCEDES-BENZ CLS-Class M156 (AMG 5.5L V8 biturbo)/M276 (3.5L V6) (C218)

Engine identity

Oils and fluids

Service and parts data

Common and chronic problems

• Air suspension components wear
• Balance shaft and timing chain issues on early M276 V6

First checks

• Inspect air suspension for leaks/noise
• Check for oil leaks around engine covers
• Verify latest software updates applied

Vor dem Teiletausch

• 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 engine availability; AMG 5.5L V8 biturbo mainly for Europe, USA and Middle East.
• Diesel engines mostly for Europe and select global markets; petrol engines global but with specific tuning per region.