OM651 (late) vs M112/M113
Side-by-side reliability comparison
Higher reliability score
M112/M113
BEST
92/100
+20 points over OM651 (late)
0
/ 100
ACCEPTABLE
OM651 (late)
Mercedes-Benz
0
/ 100
BEST
M112/M113
Mercedes-Benz
Specifications
OM651 (late)
M112/M113
Brand
Mercedes-Benz
Mercedes-Benz
Verdict
ACCEPTABLE
BEST
Reliability
72
92
Years
2014--2020
1997--2006
Displacement
2143 cc
3199 cc
Layout
I4
V6
Type
Diesel
Petrol Na
Power
136--204 hp
218--306 hp
Known Issues
2
3
Total Risk Cost
€800--€2,200
€950--€2,850
Character
OM651 (late)
"Post-2014: updated injectors + pump. Much improved. Highway excellent."
M112/M113
"Last simple MB V6/V8. Over-engineered. Cheap to maintain. 250k+ km."
Issues Comparison
OM651 (late) 2
▲ HIGH
DPF blockage — city driving concern
● MODERATE
EGR valve fouling (post-2014)
M112/M113 3
● MODERATE
Air suspension / Airmatic failure (S/ML models)
○ MINOR
Spark plugs + ignition coils (V6/V8)
○ MINOR
Coolant system: thermostat + expansion tank