Mercedes Engine Reliability
enginecreep has profiled 14 Mercedes engines, with an average reliability score of 51/100. Each one below has its own reliability score, known issues, and buying checklist.
SOLID 2RISKY 12
Mercedes
OM651
C-Class · W204 · 2011–2014
52/100RISKY
Timing Chain & Tensioner FailureEGR Cooler Coolant Leak
Mercedes
OM651
E-Class · W212 · 2009–2016
52/100RISKY
Timing Chain & Tensioner FailureTiming Chain Guide Rail Breakage
Mercedes
M156
C63 AMG · W204 · 2007–2014
45/100RISKY
Head Bolt FailureCamshaft Adjuster / Inlet Camshaft Adjuster Failure
Mercedes
OM642
ML350 CDI · W164 · 2005–2011
48/100RISKY
Timing Chain & Tensioner WearOil Cooler Seal Failure
Mercedes
OM651
GLC 220d · X253 · 2015–2019
48/100RISKY
Timing Chain Stretch & Tensioner FailureOil Leaks — Rocker Cover & Oil Filter Housing
Mercedes
OM642
ML350 CDI · W166 · 2011–2019
52/100RISKY
Timing Chain Stretch and Tensioner FailureEGR Valve and EGR Cooler Failure
Mercedes
OM642
E320 CDI · W211 · 2003–2009
48/100RISKY
Timing Chain Wear and Tensioner FailureEGR Valve and EGR Cooler Failure
Mercedes
OM654
C220d · W205 · 2018–2021
68/100SOLID
AdBlue / SCR System FailureDPF Over-Regeneration / Blockage
Mercedes
M157
CL63 AMG · C216 · 2010–2014
44/100RISKY
Timing Chain and Balance Shaft FailureCylinder Scoring
Mercedes
M271
C200 Kompressor · W203 · 2002–2007
52/100RISKY
Timing Chain & Tensioner Stretch/FailureSupercharger Bearing Wear & Failure
Mercedes
M133
A45 AMG · W176 · 2013–2018
50/100RISKY
Oil Infiltration into Engine Wiring HarnessFuel System Failures, Pump and Control Module
Mercedes
M274
C200 · W205 · 2014–2021
52/100RISKY
Timing Chain & Tensioner FailureThermostat Failure / Thermal Management Issues
Mercedes
M157
E63 AMG · W212 · 2011–2016
47/100RISKY
Timing Chain Stretch and Tensioner FailureEngine Oil Leaks (Front and Rear Seals)
Mercedes
M270
A200 · W176 · 2012–2018
62/100SOLID
Timing Chain Wear and Tensioner FailureWater Pump Failure