OM651 (early) vs M112/M113
Side-by-side reliability comparison
Higher reliability score
M112/M113
BEST
92/100
+54 points over OM651 (early)
0
/ 100
AVOID
OM651 (early)
Mercedes-Benz
0
/ 100
BEST
M112/M113
Mercedes-Benz
Specifications
OM651 (early)
M112/M113
Brand
Mercedes-Benz
Mercedes-Benz
Verdict
AVOID
BEST
Reliability
38
92
Years
2008--2014
1997--2006
Displacement
2143 cc
3199 cc
Layout
I4
V6
Type
Diesel
Petrol Na
Power
136--204 hp
218--306 hp
Known Issues
3
3
Total Risk Cost
€2,700--€7,200
€950--€2,850
Character
OM651 (early)
"Pre-2014: injectors, timing chain, DPF. Hard to work on."
M112/M113
"Last simple MB V6/V8. Over-engineered. Cheap to maintain. 250k+ km."
Issues Comparison
OM651 (early) 3
◆ CRITICAL
Piezoelectric injector failure (pre-2014)
◆ CRITICAL
Timing chain stretch (pre-2014)
▲ HIGH
DPF + EGR fouling (city use)
M112/M113 3
● MODERATE
Air suspension / Airmatic failure (S/ML models)
○ MINOR
Spark plugs + ignition coils (V6/V8)
○ MINOR
Coolant system: thermostat + expansion tank