OM611 vs M104

Side-by-side reliability comparison

Higher reliability score
M104 BEST 85/100
+13 points over OM611
0 / 100
ACCEPTABLE OM611 Mercedes-Benz
0 / 100
BEST M104 Mercedes-Benz

Specifications

OM611
M104
Brand
Mercedes-Benz
Mercedes-Benz
Verdict
ACCEPTABLE
BEST
Reliability
72
85
Years
1998--2006
1990--1997
Displacement
2148 cc
3199 cc
Layout
I4
I6
Type
Diesel
Petrol Na
Power
102--143 hp
193--231 hp
Known Issues
2
1
Total Risk Cost
€600--€1,600
€500--€2,000

Character

OM611

"W203/W210 C/E 200/220 CDI. Common rail diesel. Injector seal leak ('black death') if neglected. Turbo actuator failure. Inlet manifold swirl flaps. Fundamentally strong if maintained."

M104

"W124/R129/W140 inline-6. One of Mercedes' most reliable engines. Bulletproof bottom end. Wiring harness biodegrades (uses soy-based insulation). Head gasket solid. 400k+ km possible."

Issues Comparison

OM611 2

▲ HIGH
Injector seal leak (Black Death) €300--€800 80,000 km--150,000 km
● MODERATE
Turbo actuator failure €300--€800 80,000 km--150,000 km

M104 1

▲ HIGH
Wiring harness biodegradation €500--€2,000 100,000 km--200,000 km
Full OM611 Report Full M104 Report