OM648 vs OM656

Side-by-side reliability comparison

Higher reliability score
OM648 BEST 90/100
+8 points over OM656
0 / 100
BEST OM648 Mercedes-Benz
0 / 100
BUY OM656 Mercedes-Benz

Specifications

OM648
OM656
Brand
Mercedes-Benz
Mercedes-Benz
Verdict
BEST
BUY
Reliability
90
82
Years
2002--2006
2017--present
Displacement
3222 cc
2999 cc
Layout
I6
I6
Type
Diesel
Diesel
Power
204 hp
243--330 hp
Known Issues
2
2
Total Risk Cost
€450--€1,100
€500--€2,000

Character

OM648

"Modern OM606 successor. Excellent highway cruiser. Strong torque."

OM656

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

Issues Comparison

OM648 2

● MODERATE
EGR valve fouling (city use) €300--€700 80,000 km--160,000 km
○ MINOR
Glow plugs + injector seals €150--€400 80,000 km--160,000 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

OM648 6

E-Class W210 1999--2002 C-Class W203 2001--2005 E-Class W210 1999--2002 S-Class W220 1999--2002 S-Class W220 2002--2005 E 320 CDI W211 2002--2009 Sedan

OM656 3

E 400d W213 2016--2024 Sedan GLE 350d W166 2015--2019 SUV S 350d W222 2013--2020 Sedan
Full OM648 Report Full OM656 Report