Mercedes-Benz R-Class W251/V251 500
Model overview
The W251/V251 R-Class offers excellent space and comfort, but its age, complex equipment and mixed petrol and diesel powertrains make specification, condition and service history especially important.
Pros
- Comfortable, spacious cabin
- Flexible passenger and load capacity
- Refined long-distance character
Cons
- Complex systems can be expensive to repair
- Large size brings higher running costs
- Petrol and diesel versions need different maintenance attention
Common problems & ownership concerns
Potential impact: Low · Medium · High. This describes possible consequences, not fault likelihood.
- Air suspension and chassis-system wear on equipped vehiclesMedium
- Age-related electrical and convenience-system faultsMedium
- Corrosion and body-sealing deteriorationMedium
Maintenance
Use the VIN-specific service schedule, approved fluids and engine-code requirements; check separate transmission, drivetrain, suspension and emissions servicing where fitted.
Engine overview · 5.5L 8-cyl PETROL
A refined, naturally aspirated V8 suited to the large R-Class, with ownership quality strongly dependent on service history and production revision.
Pros
- Smooth V8 performance
- Refined long-distance character
- Strongly supported engine family
Cons
- High fuel use
- Potentially costly V8-specific repairs
- Early and later revisions differ
Common problems & ownership concerns
Potential impact: Low · Medium · High. This describes possible consequences, not fault likelihood.
- M273 timing-chain idler-gear wear on earlier engine revisionsHigh
- M273 intake-manifold runner mechanism faultsMedium
- M273 cam-adjuster oil leakage and timing-control faultsMedium
- M273 cooling-system component ageingMedium
Maintenance
Follow the VIN-specific Mercedes-Benz schedule and approved oil specification, with particular attention to documented engine-revision servicing.
These are general ownership concerns, not a diagnosis. Equipment and engine details vary by version and production date.
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