OM612 vs OM654
Side-by-side reliability comparison
Higher reliability score
OM654
BEST
85/100
+15 points over OM612
0
/ 100
ACCEPTABLE
OM612
Mercedes-Benz
0
/ 100
BEST
OM654
Mercedes-Benz
Specifications
OM612
OM654
Brand
Mercedes-Benz
Mercedes-Benz
Verdict
ACCEPTABLE
BEST
Reliability
70
85
Years
1999--2005
2016--present
Displacement
2685 cc
1950 cc
Layout
I5
I4
Type
Diesel
Diesel
Power
170 hp
150--245 hp
Known Issues
1
2
Total Risk Cost
€300--€800
€500--€1,500
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."
OM654
"Best modern MB diesel. Aluminium block, low friction. Long-distance champion."
Issues Comparison
OM612 1
▲ HIGH
Injector seal leak (Black Death)
OM654 2
○ MINOR
DPF — better than older MB diesels but still diesel
○ MINOR
Minor EGR fouling (best-in-class but not immune)
Models
OM612 1
OM654 47
B-Class
A-Class
GLA
A-Class
C-Class
C-Class
GLC
E-Class
GLC
E-Class
GLE
E-Class
C-Class
C-Class
GLC
GLC
E-Class
C-Class
E-Class
GLC
C-Class
C-Class
GLC
E-Class
CLA
A-Class
CLA
B-Class
GLA
GLA
A-Class
E-Class
S-Class
GLE
E-Class
G-Class
E-Class
G-Class
G-Class
S-Class
S-Class
S-Class
GLE
S-Class
C 220d Wagon
E 220d Wagon
GLC 220d Coupe