2011 MERCEDES-BENZ SL-Class M278 DE46 LA/M159 (R231)
R231 / 2-door convertible coupe / Global / selective markets availability
M278 DE46 LAM159M157Registro exacto de año/versiónGold
Engine identity
Oils and fluids
Service and parts data
Common and chronic problems
- Variable valve timing wear in high mileage M278 engines
- Electrical system minor glitches
First checks
- Engine oil level and condition
- Ignition coils and spark plugs
- Soft top hydraulic system and seals
Antes de cambiar piezas
- Save fault codes and freeze-frame data before clearing anything.
- Check engine oil, coolant and transmission fluid using the correct temperature and service procedure.
- Verify power, ground, connectors, hoses, leaks and live data before replacing expensive parts.
Important notes
- 2011 was the launch year for the R231 SL-Class generation globally with gradual market-specific engine availability.
- AMG variants like SL 63 and SL 65 introduced in limited markets later in 2011 or 2012.