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W204 Sedan · Estate · Coupe
Mercedes-Benz C-Class · Sedan · Estate · Coupe · 2007–2014
Home of the naturally aspirated 6.2 C63 AMG.
Production run
2007–2014
Engines covered
6
Avg. part price
—
19902026
Interactive systems map
Inspect the W204
Tap a hotspot to inspect that system
Systems map
Where it goes wrong
Each numbered hotspot counts the documented failure points in that area. Select one to see the specifics for this chassis and engine.
Failure points by system
Engine4
Cooling1
Intake2
Fuel1
Documented issues per engine
4M271
4M272
4M276
4M156
4OM651
5OM642
Known weak points
What breaks on the W204
Timing chain and tensioner (well-known)Diagnose →Balance shaft gear wear (2003–2008)Diagnose →Balance shaft gear wear (2004–2008)Diagnose →Intake manifold swirl flap failureDiagnose →Camshaft adjuster / magnet faultsDiagnose →Oil separatorDiagnose →Head bolt corrosion/stretchDiagnose →Camshaft and lifter wearDiagnose →Injector failuresDiagnose →Timing chain (early)Diagnose →Oil cooler seal leak (classic)Diagnose →Swirl flap / intake runner failureDiagnose →
Guides & playbooks
W204 playbooks
Maintenance scheduleGive me a mileage-based maintenance schedule for a Mercedes-Benz C-Class W204, including the items the factory schedule skips.Buyer's inspectionI'm inspecting a used Mercedes-Benz C-Class W204. What exactly should I check, test drive and look for underneath?Build planPlan a staged performance build for a Mercedes-Benz C-Class W204 that stays reliable as a daily driver.Fault code lookupI have a fault code on my Mercedes-Benz C-Class W204. Walk me through what it means and how to confirm the cause.
Fits your W204
Parts & tools
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