KNOWN FAULTS · Mercedes-Benz
Mercedes-Benz CL (C216) CL 63 AMG (M156, 6.2 V8, hasta 2010) common problems.
2006–2014 · Petrol
Sources are not verified in real time and no entry confirms that your car is affected.
2 known faults with sources
AMG 6.2 (M156) head bolts and camshaftsEngine (cylinder head / valvetrain)
- 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
Australian Car Reviews: C 63 AMG faultsAustralian Car Reviews: M156 engineAustralian Car Reviews: CLS 63 and the bolt bulletinFCP Euro: M156 faults
View full entryApplies if: Only if fitted with air suspension.
AIRMATIC leaks and compressorSuspension
- Engine / equipment
- AIRMATIC air suspension: E-Class W211, W212 and W213, S W220 to W223, CLS, CL, ML W164, GL, GLE and GLS
- Period mentioned
- 2002–2026
- Symptoms
- One corner sags overnight, suspension fault warning, the compressor runs a lot or a compressor overheated message appears; eventually the car sits low and rides hard.
- Possible cause described
- The air bellows on the struts leak with age, often at the upper crimp rings, and the compressor overworks until it burns out. The valve block and lines also leak, and the compressor relay (in the rear SAM on W221, W222 and W213) and ride height sensors fail.
- Check for the garage
- Spray soapy water on bellows, lines and valve block; read each corner's data with Xentry; check the compressor fuse and relay. Do not replace the compressor without fixing the leak first, or the new one will fail soon.
- Cost cited in the source
- Compressor: approx. €600–1,200 at an independent garage (converted from Canadian dollars); bellows: depends on the cornerA rough figure from the original database, not an up-to-date quote.
Mileage cited in the database: 95,000–115,000 km. This is not a maintenance interval and does not predict a failure.
Sources from the original database
Foreign Automotive: AIRMATIC symptoms, causes and costsEuro Premium Parts: Mercedes air suspension failureAu7o: AIRMATIC compressor on the S-ClassSuncore: AIRMATIC diagnosis on the ML and GL
View full entry