OM642 vs OM648

Side-by-side reliability comparison

Higher reliability score
OM648 BEST 90/100
+8 points over OM642
0 / 100
BUY OM642 Mercedes-Benz
0 / 100
BEST OM648 Mercedes-Benz

Specifications

OM642
OM648
Brand
Mercedes-Benz
Mercedes-Benz
Verdict
BUY
BEST
Reliability
82
90
Years
2005--2020
2002--2006
Displacement
2987 cc
3222 cc
Layout
V6
I6
Type
Diesel
Diesel
Power
190--265 hp
204 hp
Known Issues
3
2
Total Risk Cost
€1,500--€4,400
€450--€1,100

Character

OM642

"Legendary V6 diesel. 250k+ km. Fix swirl flaps and enjoy."

OM648

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

Issues Comparison

OM642 3

▲ HIGH
Valley oil cooler seal failure — #1 issue €800--€2,000 80,000 km--150,000 km
● MODERATE
Intake swirl flap actuator failure €400--€900 60,000 km--130,000 km
● MODERATE
BlueTEC NOx system / DEF issues (where fitted) €300--€1,500 60,000 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

OM642 13

E-Class W211 2005--2009 S-Class W221 2005--2009 GLE W166 2015--2019 C-Class W203 2005--2007 CLK W209 2005--2009 S-Class W222 2013--2017 C-Class W204 2009--2014 E-Class W212 2012--2016 E-Class W212 2009--2016 E-Class W211 2005--2009 S-Class W221 2009--2013 G-Class W463 2010--2018 ML 350 CDI W164 2005--2011 SUV

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 OM642 Report Full OM648 Report