OM611 vs OM656

Side-by-side reliability comparison

Higher reliability score
OM656 BUY 82/100
+10 points over OM611
0 / 100
ACCEPTABLE OM611 Mercedes-Benz
0 / 100
BUY OM656 Mercedes-Benz

Specifications

OM611
OM656
Brand
Mercedes-Benz
Mercedes-Benz
Verdict
ACCEPTABLE
BUY
Reliability
72
82
Years
1998--2006
2017--present
Displacement
2148 cc
2999 cc
Layout
I4
I6
Type
Diesel
Diesel
Power
102--143 hp
243--330 hp
Known Issues
2
2
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."

OM656

"Flagship modern MB diesel. Inline-6 smoothness returns. MHEV. GLE/GLS/S-Class. Excellent highway. Early data strong."

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

OM656 2

● MODERATE
DPF + EGR — diesel city driving concern €400--€1,200 60,000 km--120,000 km
○ MINOR
AdBlue / SCR system consumption and faults €100--€800 30,000 km--∞

Models

OM611 0

No models listed.

OM656 3

E 400d W213 2016--2024 Sedan GLE 350d W166 2015--2019 SUV S 350d W222 2013--2020 Sedan
Full OM611 Report Full OM656 Report