Mercedes-Benz CLS C218/X218 CLS 63 AMG
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 · 5.5L 8-cyl PETROL
A powerful, complex twin-turbo V8 family. Careful servicing and confirmation of the exact M157 variant are important because repair costs can be substantial.
Pros
- Very strong performance and flexible torque delivery.
- Available in standard and higher-output S-Model forms.
Cons
- Complex turbocharged and direct-injection hardware.
- High-performance use can increase thermal and maintenance demands.
Common problems & ownership concerns
Potential impact: Low · Medium · High. This describes possible consequences, not fault likelihood.
- Early M157 timing-chain tensioner wearHigh
- M157 turbocharger oil or coolant leaksHigh
- M157 camshaft-adjuster and valvetrain noiseMedium
- Direct-injection carbon and ignition-system faultsMedium
Maintenance
Use the VIN-specific AMG service schedule and approved oil specification; keep detailed records for oil, plugs, ignition and cooling-system maintenance.
These are general ownership concerns, not a diagnosis. Equipment and engine details vary by version and production date.
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