M119 vs OM656
Side-by-side reliability comparison
Higher reliability score
OM656
BUY
82/100
+10 points over M119
0
/ 100
ACCEPTABLE
M119
Mercedes-Benz
0
/ 100
BUY
OM656
Mercedes-Benz
Specifications
M119
OM656
Brand
Mercedes-Benz
Mercedes-Benz
Verdict
ACCEPTABLE
BUY
Reliability
72
82
Years
1989--1998
2017--present
Displacement
4973 cc
2999 cc
Layout
V8
I6
Type
Petrol Na
Diesel
Power
326--381 hp
243--330 hp
Known Issues
1
2
Total Risk Cost
€500--€2,000
€500--€2,000
Character
M119
"W124 500E/E500, R129 SL500, W140 S500 V8. DOHC 32V. Wiring harness issue (biodegradable). Ignition system needs attention at high mileage. Strong engine, expensive to maintain."
OM656
"Flagship modern MB diesel. Inline-6 smoothness returns. MHEV. GLE/GLS/S-Class. Excellent highway. Early data strong."
Issues Comparison
M119 1
▲ HIGH
Wiring harness biodegradation
OM656 2
● MODERATE
DPF + EGR — diesel city driving concern
○ MINOR
AdBlue / SCR system consumption and faults