2018 MERCEDES-BENZ SL-Class M278 DE46 LA/M157 E63 AMG (R231)
R231 / 2-door Convertible / Global with regional engine variations
M278 DE46 LAM157 E63 AMGM176 DE40 LA (AMG)M264 (4-cylinder, China)Exact year/trim recordSilver
Engine identity
Oils and fluids
Service and parts data
Common and chronic problems
- Potential balance shaft bearing wear (on M278 V8) in high mileage
- Electronic module faults affecting roof mechanism
First checks
- Verify engine code for market-specific compliance
- Ensure transmission software update status
Before replacing parts
- 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
- SL-Class 2018 marking late phase of R231 generation before 2020 facelift.
- China market offers a 2.0L 4-cylinder variant due to local regulations which differs significantly from global V8 engines.