Mercedes-Benz R-Class W251/V251 R 350 (3498 cc)
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 · 3.5L 6-cyl PETROL
A smooth, capable naturally aspirated V6 for the R-Class, but some M272 production periods and age-related systems need careful verification before purchase.
Pros
- Refined and flexible V6 performance.
- Well-supported engine design.
- No turbocharger system in this application group.
Cons
- Potentially costly timing-gear issue on some earlier engines.
- Age-related intake, oil-leak and cooling repairs.
- Repair access can be restricted.
Common problems & ownership concerns
Potential impact: Low · Medium · High. This describes possible consequences, not fault likelihood.
- Earlier M272 applicationsHigh
- M272 intake-manifold actuator wearMedium
- M272 oil leaks at seals and coversMedium
- M272 cooling-system and thermostat ageingHigh
Maintenance
Follow the VIN-specific Mercedes-Benz service schedule and approved oil specification; keep cooling and timing-related maintenance documented.
These are general ownership concerns, not a diagnosis. Equipment and engine details vary by version and production date.
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