M279 vs OM654
Side-by-side reliability comparison
Higher reliability score
OM654
BEST
85/100
+30 points over M279
0
/ 100
CAUTION
M279
Mercedes-Benz
0
/ 100
BEST
OM654
Mercedes-Benz
Specifications
M279
OM654
Brand
Mercedes-Benz
Mercedes-Benz
Verdict
CAUTION
BEST
Reliability
55
85
Years
2013--2020
2016--present
Displacement
5980 cc
1950 cc
Layout
V12
I4
Type
Petrol Turbo
Diesel
Power
530--630 hp
150--245 hp
Known Issues
2
2
Total Risk Cost
€4,000--€15,000
€500--€1,500
Character
M279
"S65/SL65/G65 AMG. Twin-turbo V12. Turbo failure. ABC suspension fluid leaks contaminate engine bay. Timing chain. Catastrophically expensive to repair. Ultimate AMG but specialist only."
OM654
"Best modern MB diesel. Aluminium block, low friction. Long-distance champion."
Issues Comparison
M279 2
◆ CRITICAL
Turbo failure
▲ HIGH
ABC suspension fluid contamination
OM654 2
○ MINOR
DPF — better than older MB diesels but still diesel
○ MINOR
Minor EGR fouling (best-in-class but not immune)
Models
M279 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