Common Problems with Mercedes-Benz M276 V6 | 603 MTech Autowerks®
Published at : 13 Dec 2025
Own or looking to purchase a Mercedes-Benz with the M276 V6 Engine? this video is a must-watch! We go over common M276 engine problems, their symptoms, and how to fix them. Our expert Mercedes tech at 603 MTech Autowerks break it down step by step:
1. Upper Front Timing Cover Leak – Why it happens & how to fix it
2. Camshaft Adjuster Rattle on Startup – Symptoms of worn adjusters
⚠️ P001177 - The position of the intake camshaft (Bank 1) deviates from the specified valve.
⚠️ P002177 - The position of the intake camshaft (Bank 2) deviates from the specified valve.
3. Secondary Timing Chain Tensioners – Causes of chain slack & noise
4. Camshaft Issues – Wear problems & performance impact
⚠️ P001685 - The position of the intake camshaft (Bank 1) is implausible.
⚠️ P001885 - The position of the intake camshaft (Bank 2) is implausible.
5. Ignition Coils - Misfires & check engine light issues
6. Camshaft Position Sensors - oil in harness issue & CEL issues
⚠️ P0340 – Camshaft Position Sensor Circuit Malfunction.
⚠️ P0341 – Camshaft Position Sensor Performance Issue.
7. Cooling System Failures – Water pump & thermostat problems
8. Drive Belt Pulleys – Squeaks, failure risks & maintenance tips
9. Engine Mounts – Signs of worn mounts & why they matter
10. PCV Valve Issues – Oil consumption & rough idle explained
🚗 Affected Mercedes-Benz Models with the M276 Engine:
✔️ C-Class: C300, C400, C450 AMG, C43 AMG (W205)
✔️ E-Class: E300, E350, E400, E450, E43 AMG (W212, W213)
✔️ S-Class: S400, S450 (W222)
✔️ GLC-Class: GLC43 AMG
✔️ GLE-Class: GLE350, GLE400, GLE43 AMG
✔️ GL-Class / GLS-Class: GL450, GLS450
✔️ ML-Class: ML350, ML400 (W166)
✔️ R-Class: R350
✔️ SLK / SLC-Class: SLK350, SLC300, SLC43 AMG
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