AMG 6.2 (M156) head bolts and camshafts

Sources are not verified in real time and no entry confirms that your car is affected.

Engine / equipment: M156 6.2 V8 AMG (C 63 W204, E 63 W211 and W212 until 2011, CLK 63, CLS 63, ML 63, S 63 and CL 63 until 2010, SL 63)
Period mentioned: 2006–2015
Symptoms: Coolant loss, coolant in the oil or white smoke (broken head bolts); rattle or ticking on start-up (camshaft and lifter wear).
Possible cause described: Cylinder head bolts that break on engines up to 2012 (Mercedes bulletin from 2011) and nodular cast-iron camshafts that wear together with the lifters, mainly on the intake side (bulletin from 2009).
Check for the garage: Overnight cooling system pressure test, oil analysis and camshaft inspection with a borescope.
Cost cited in the source: Major engine repair (several thousand euros)A rough figure from the original database, not an up-to-date quote.

Sources from the original database

Anonymous answer, no personal data.

How much does it cost to repair this fault?

Major engine repair (several thousand euros)

A rough figure from the original database, not an up-to-date quote.

How is it checked?

Overnight cooling system pressure test, oil analysis and camshaft inspection with a borescope.

What are the symptoms?

Coolant loss, coolant in the oil or white smoke (broken head bolts); rattle or ticking on start-up (camshaft and lifter wear).

Which cars and years does it affect?

Brands: Mercedes-Benz
Engine / equipment: M156 6.2 V8 AMG (C 63 W204, E 63 W211 and W212 until 2011, CLK 63, CLS 63, ML 63, S 63 and CL 63 until 2010, SL 63)
Period mentioned: 2006–2015

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