OM668 vs OM648

Side-by-side reliability comparison

Higher reliability score
OM648 BEST 90/100
+32 points over OM668
0 / 100
CAUTION OM668 Mercedes-Benz
0 / 100
BEST OM648 Mercedes-Benz

Specifications

OM668
OM648
Brand
Mercedes-Benz
Mercedes-Benz
Verdict
CAUTION
BEST
Reliability
58
90
Years
1998--2004
2002--2006
Displacement
1689 cc
3222 cc
Layout
I4
I6
Type
Diesel
Diesel
Power
75--95 hp
204 hp
Known Issues
2
2
Total Risk Cost
€800--€2,000
€450--€1,100

Character

OM668

"W168 A-Class. Same era as M166 petrol. Injector issues. Head gasket concerns. Turbo failure on higher-output version. Not Mercedes' best diesel. Better alternatives exist."

OM648

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

Issues Comparison

OM668 2

▲ HIGH
Head gasket failure €500--€1,200 80,000 km--150,000 km
● MODERATE
Injector failure €300--€800 80,000 km--150,000 km

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

Models

OM668 2

A-Class W168 1998--2004 A-Class W168 1998--2004

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
Full OM668 Report Full OM648 Report