OM608 vs OM654
Side-by-side reliability comparison
Higher reliability score
OM654
BEST
85/100
+13 points over OM608
0
/ 100
ACCEPTABLE
OM608
Mercedes-Benz
0
/ 100
BEST
OM654
Mercedes-Benz
Specifications
OM608
OM654
Brand
Mercedes-Benz
Mercedes-Benz
Verdict
ACCEPTABLE
BEST
Reliability
72
85
Years
2018--present
2016--present
Displacement
1461 cc
1950 cc
Layout
I4
I4
Type
Diesel
Diesel
Power
116 hp
150--245 hp
Known Issues
1
2
Total Risk Cost
€300--€600
€500--€1,500
Character
OM608
"W177 A-Class, W247 B-Class. Renault K9K sourced and rebadged. Same proven diesel. DPF standard. Timing belt (same K9K belt concerns). Well-understood engine under a Mercedes badge."
OM654
"Best modern MB diesel. Aluminium block, low friction. Long-distance champion."
Issues Comparison
OM608 1
▲ HIGH
Timing belt (K9K heritage)
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