Timing chain kit M278 for Mercedes-Benz

OE-spec timing chain kit engineered for Mercedes-Benz vehicles with the M278 4.7 V8 biturbo engine. Restores precise valve timing, quiet starts, and reliable performance after chain stretch or guide wear.

What's Included

Primary timing chain, fixed and pivot guides, hydraulic tensioner, guide pins/rails, front cover seal/gasket where supplied.

Key Features

• OE-Matched Geometry: Correct chain pitch and guide profile for accurate cam timing.
• Quiet Operation: Hardened pins and low-friction guide faces reduce start-up rattle.
• Stable Tension Control: Calibrated hydraulic tensioner maintains chain load across RPM and temperature.
• Exact Fitment: Direct replacement parts for a no-mod install with factory timing tools.

Compatibility

Common Mercedes models with M278 V8 biturbo: S-Class W221 late/W222 early (S500/S550), E-Class W212 (E500/E550), CLS C218/X218 (CLS500/CLS550), ML W166/GLE W166 (ML500/ML550/GLE500 where fitted), GL X166/GLS X166 (GL500/GLS500/GLS550), select G-Class W463 markets (G500/G550). Not for AMG 63 models — those use M157 or M177 engines. Always match by VIN.

Note: Oil, sealant, crank bolt, cam phasers, water pump, and belts not included unless listed.

This is an aftermarket replacement part, not a genuine Mercedes-Benz product. Not affiliated with or endorsed by Mercedes-Benz Group AG.