Mercedes-Benz SL R107/C107 450 (4520 cc)
Model overview
A durable but now historic grand tourer whose ownership experience depends heavily on corrosion control, maintenance history and restoration quality. The 1971–1989 range includes significantly different engines and equipment.
Pros
- Durable classic mechanical design
- Comfortable coupe and roadster character
- Strong specialist support
Cons
- Rust can be severe and expensive
- Ageing electrics and vacuum systems
- Trim and soft-top parts may be costly
Common problems & ownership concerns
Potential impact: Low · Medium · High. This describes possible consequences, not fault likelihood.
- Structural and body corrosionHigh
- Ageing electrical and vacuum systemsMedium
- Suspension, steering and braking wearHigh
- Climate control and cabin equipment faultsMedium
Maintenance
Follow the exact year and engine schedule, with particular attention to corrosion, cooling, belts, brake hydraulics and suspension condition.
Engine overview · 4.5L 8-cyl PETROL
The R107/C107 4.5-litre V8 is a durable period engine when properly maintained, but this group includes different injection and emissions configurations across years and markets.
Pros
- Smooth, strong V8 character.
- Conventional layout with good specialist support.
- Potentially long service life when cooling and lubrication are maintained.
Cons
- Age-related seals, hoses and wiring need attention.
- Injection and emissions systems vary by application.
- Neglected chain or cooling work can be costly.
Common problems & ownership concerns
Potential impact: Low · Medium · High. This describes possible consequences, not fault likelihood.
- Timing-chain, guide and tensioner wear on applicable M117 variantsHigh
- Ageing fuel-injection components on D-Jetronic or K-Jetronic applicationsMedium
- Cooling-system deteriorationHigh
- Oil leaks from aged seals and gasketsLow
Maintenance
Confirm engine, market and injection specification by VIN and engine number; follow the applicable Mercedes-Benz service information and address chain noise, coolant loss or overheating promptly.
These are general ownership concerns, not a diagnosis. Equipment and engine details vary by version and production date.
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