OM612 vs OM656

Side-by-side reliability comparison

Higher reliability score
OM656 BUY 82/100
+12 points over OM612
0 / 100
ACCEPTABLE OM612 Mercedes-Benz
0 / 100
BUY OM656 Mercedes-Benz

Specifications

OM612
OM656
Brand
Mercedes-Benz
Mercedes-Benz
Verdict
ACCEPTABLE
BUY
Reliability
70
82
Years
1999--2005
2017--present
Displacement
2685 cc
2999 cc
Layout
I5
I6
Type
Diesel
Diesel
Power
170 hp
243--330 hp
Known Issues
1
2
Total Risk Cost
€300--€800
€500--€2,000

Character

OM612

"W210/W211 E270 CDI. 5-cylinder diesel. Smooth, torquey. Injector seal 'black death' concern. Turbo resonator failure. EGR issues. Good motorway cruiser when maintained."

OM656

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

Issues Comparison

OM612 1

▲ HIGH
Injector seal leak (Black Death) €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

OM612 1

E-Class W211 2002--2005

OM656 3

E 400d W213 2016--2024 Sedan GLE 350d W166 2015--2019 SUV S 350d W222 2013--2020 Sedan
Full OM612 Report Full OM656 Report