Mercedes-Benz C-Class W204/S204/C204 C 350 (3498 cc)
Model overview
A comfortable C-Class with several body styles and engines. Ageing chassis, electrical equipment and gearbox condition shape ownership costs.
Pros
- Good motorway comfort
- Solid cabin feel
- Useful body-style choice
Cons
- Age-related electrical faults
- Premium repair costs
- Gearbox upkeep varies by version
Common problems & ownership concerns
Potential impact: Low · Medium · High. This describes possible consequences, not fault likelihood.
- Suspension wearMedium
- Electrical equipment faultsMedium
- Automatic transmission faults on affected versionsHigh
Maintenance
Use the exact engine and gearbox schedule and maintain brakes, suspension and corrosion protection.
Engine overview · 3.5L 6-cyl PETROL
A refined 3.5-litre petrol V6 group, but applications differ substantially between earlier M272 engines, CGI direct-injection versions and later C 350 engines.
Pros
- Smooth, refined V6 performance
- Established Mercedes-Benz servicing support
Cons
- Engine-code differences materially affect risk areas
- Some earlier engines may need costly timing repairs
- CGI versions have additional direct-injection hardware
Common problems & ownership concerns
Potential impact: Low · Medium · High. This describes possible consequences, not fault likelihood.
- Timing-gear wear on affected early M272 engine numbersHigh
- M272 intake-manifold runner wear or actuator faultsMedium
- Later V6 timing-chain, tensioner or cam-adjuster noiseHigh
- CGI direct-injection deposits or fuel-system faultsMedium
Maintenance
Follow the VIN-specific Mercedes-Benz oil specification and service schedule, with particular attention to documented timing, intake and fuel-system maintenance.
These are general ownership concerns, not a diagnosis. Equipment and engine details vary by version and production date.
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