Mercedes-Benz CLS C218/X218 350
Model overview
The C218/X218 CLS offers excellent refinement and distinctive styling, but its many engine, drivetrain and equipment combinations make condition and specification more important than a single generation-wide reliability judgement.
Pros
- Refined long-distance comfort
- Distinctive Coupe and Shooting Brake styling
- Strong practicality for the design
Cons
- Complex electronics and optional equipment
- Different engines have different service needs
- Restricted rear access compared with a saloon
Common problems & ownership concerns
Potential impact: Low · Medium · High. This describes possible consequences, not fault likelihood.
- Electronic and comfort-equipment faultsMedium
- Suspension and chassis wear on fitted equipmentMedium
- Corrosion and body-sealing deteriorationMedium
Maintenance
Use the VIN-specific service schedule and engine-approved lubricant; diesel cars used mainly for short trips need careful emissions-system maintenance.
Engine overview · 3.5L 6-cyl PETROL
The CLS C218/X218 uses this 3.5-litre petrol group in both naturally aspirated 350 and turbocharged 400 forms. Refinement is a strength, but ownership concerns vary substantially with the exact engine code and build specification.
Pros
- Smooth six-cylinder refinement
- Strong performance range
- Well suited to long-distance driving
Cons
- Different maintenance risks between 350 and 400 versions
- Correct oil specification and service history are important
Common problems & ownership concerns
Potential impact: Low · Medium · High. This describes possible consequences, not fault likelihood.
- Oil leaks and crankcase ventilationMedium
- Timing-chain or cam-adjuster wearHigh
- Turbocharger and charge-air system concerns on 400 variants onlyMedium
Maintenance
Follow the VIN-specific Mercedes-Benz schedule and approved oil specification; maintenance requirements differ between naturally aspirated 350 and turbocharged 400 applications.
These are general ownership concerns, not a diagnosis. Equipment and engine details vary by version and production date.
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