M270 vs OM654
Side-by-side reliability comparison
Higher reliability score
OM654
BEST
85/100
+15 points over M270
0
/ 100
ACCEPTABLE
M270
Mercedes-Benz
0
/ 100
BEST
OM654
Mercedes-Benz
Specifications
M270
OM654
Brand
Mercedes-Benz
Mercedes-Benz
Verdict
ACCEPTABLE
BEST
Reliability
70
85
Years
2012--2018
2016--present
Displacement
1595 cc
1950 cc
Layout
I4
I4
Type
Petrol Turbo
Diesel
Power
122--218 hp
150--245 hp
Known Issues
3
2
Total Risk Cost
€1,400--€3,100
€500--€1,500
Character
M270
"Transverse M274. Solid compact MB. Chain lifespan ~130k km."
OM654
"Best modern MB diesel. Aluminium block, low friction. Long-distance champion."
Issues Comparison
M270 3
● MODERATE
Camshaft actuator / solenoid noise
● MODERATE
Timing chain stretch at ~130k km
○ MINOR
Intake carbon buildup (DI)
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