M111 vs M104

Side-by-side reliability comparison

Higher reliability score
M104 BEST 85/100
+9 points over M111
0 / 100
ACCEPTABLE M111 Mercedes-Benz
0 / 100
BEST M104 Mercedes-Benz

Specifications

M111
M104
Brand
Mercedes-Benz
Mercedes-Benz
Verdict
ACCEPTABLE
BEST
Reliability
76
85
Years
1992--2003
1990--1997
Displacement
2295 cc
3199 cc
Layout
I4
I6
Type
Petrol Na
Petrol Na
Power
122--193 hp
193--231 hp
Known Issues
2
1
Total Risk Cost
€1,000--€2,500
€500--€2,000

Character

M111

"W202/W210 4-cyl. Supercharged Kompressor versions. Simple, reliable. Head gasket is the main concern. Kompressor clutch can fail. Good parts availability."

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

M111 2

▲ HIGH
Head gasket failure €600--€1,500 100,000 km--200,000 km
● MODERATE
Kompressor clutch/bearing failure €400--€1,000 80,000 km--150,000 km

M104 1

▲ HIGH
Wiring harness biodegradation €500--€2,000 100,000 km--200,000 km
Full M111 Report Full M104 Report