M279 vs OM656

Side-by-side reliability comparison

Higher reliability score
OM656 BUY 82/100
+27 points over M279
0 / 100
CAUTION M279 Mercedes-Benz
0 / 100
BUY OM656 Mercedes-Benz

Specifications

M279
OM656
Brand
Mercedes-Benz
Mercedes-Benz
Verdict
CAUTION
BUY
Reliability
55
82
Years
2013--2020
2017--present
Displacement
5980 cc
2999 cc
Layout
V12
I6
Type
Petrol Turbo
Diesel
Power
530--630 hp
243--330 hp
Known Issues
2
2
Total Risk Cost
€4,000--€15,000
€500--€2,000

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."

OM656

"Flagship modern MB diesel. Inline-6 smoothness returns. MHEV. GLE/GLS/S-Class. Excellent highway. Early data strong."

Issues Comparison

M279 2

◆ CRITICAL
Turbo failure €3,000--€10,000 60,000 km--120,000 km
▲ HIGH
ABC suspension fluid contamination €1,000--€5,000 40,000 km--100,000 km

OM656 2

● MODERATE
DPF + EGR — diesel city driving concern €400--€1,200 60,000 km--120,000 km
○ MINOR
AdBlue / SCR system consumption and faults €100--€800 30,000 km--∞

Models

M279 1

S-Class W222 2014--2020

OM656 3

E 400d W213 2016--2024 Sedan GLE 350d W166 2015--2019 SUV S 350d W222 2013--2020 Sedan
Full M279 Report Full OM656 Report