M156
Mercedes-Benz · M156 6.2 V8 AMG
2006–2015
"C63/E63/S63 W204/W212/W221. Head bolt failure on early units (2007-2008). Intake manifold swirl flap. Cam adjuster bolts. Incredible NA V8 sound. Later production much improved."
Mileage Risk Timeline
When problems typically appear — enter your mileage to see your risk zone
Known Issues 2
Head bolt failure (2007-2008)
▸Coolant loss, overheating
Early production: head bolts stretch/fail. Mercedes revised. Check production date.
Head bolts πρώιμα 2007-2008. ΕΛΕΓΞΤΕ.
Intake manifold swirl flap
▸Rattle, power loss
Swirl flap in intake can fail.
Swirl flap intake — €500-1,500.
Models with M156 3
Related Guides
Other Mercedes-Benz Engines
Tuning Potential
Supercharger to 650hp+
Frequently Asked Questions
Is the Mercedes-Benz M156 reliable?
The Mercedes-Benz M156 scores 60/100 with a verdict of CAUTION. It has 2 documented issues with total repair costs between €2,500 and €7,500.
What are the common problems with the M156?
The most common issues are:
- Head bolt failure (2007-2008) — critical, repair cost €2,000–€6,000, 40,000 km–100,000 km
- Intake manifold swirl flap — high, repair cost €500–€1,500, 60,000 km–120,000 km
What cars use the Mercedes-Benz M156?
How much does it cost to repair the M156?
Total potential repair costs for all 2 known issues range from €2,500 to €7,500. The most expensive issue is typically .
What years was the M156 produced?
The Mercedes-Benz M156 was produced from 2006 to 2015. It is a 6208cc V8 petrol na engine.
Scores are calculated from documented issues, repair costs, and failure patterns across thousands of owner reports and technical sources. Learn about our methodology. Always inspect before you buy.