Mercedes-Benz C-Class W205 — Reliability
Reliability Summary
Engine
R9M — 60/100
CAUTION
Known Issues
7
Engine in this model
Known Issues Across All Engines
| Issue | Engine | Severity |
|---|---|---|
| Cylinder block can crack (2015-2018 Espace, Talisman, Trafic) | R9M | critical |
| Variable-geometry turbo failure (130 hp) | R9M | high |
| Timing chain stretch | R9M | high |
| EGR cooler or exhaust manifold cracks (exhaust smell in the cabin) | R9M | moderate |
| Piezo injector faults | R9M | moderate |
| EGR valves and particulate filter clog (city use) | R9M | moderate |
| Oil leaks at the timing cover or oil filter housing | R9M | minor |