M266 vs OM654
Side-by-side reliability comparison
Higher reliability score
OM654
BEST
85/100
+23 points over M266
0
/ 100
CAUTION
M266
Mercedes-Benz
0
/ 100
BEST
OM654
Mercedes-Benz
Specifications
M266
OM654
Brand
Mercedes-Benz
Mercedes-Benz
Verdict
CAUTION
BEST
Reliability
62
85
Years
2005--2011
2016--present
Displacement
2034 cc
1950 cc
Layout
I4
I4
Type
Petrol Na
Diesel
Power
116--193 hp
150--245 hp
Known Issues
1
2
Total Risk Cost
€800--€2,000
€500--€1,500
Character
M266
"W245 B-Class. Inclined engine (at 57°). Unusual design. Balance shaft chain can break. Oil leaks. CVT gearbox issues (not engine). Turbo version (B200T) more troublesome."
OM654
"Best modern MB diesel. Aluminium block, low friction. Long-distance champion."
Issues Comparison
M266 1
▲ HIGH
Balance shaft chain failure
OM654 2
○ MINOR
DPF — better than older MB diesels but still diesel
○ MINOR
Minor EGR fouling (best-in-class but not immune)
Models
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