OM651 (late) vs OM648

Side-by-side reliability comparison

Higher reliability score
OM648 BEST 90/100
+18 points over OM651 (late)
0 / 100
ACCEPTABLE OM651 (late) Mercedes-Benz
0 / 100
BEST OM648 Mercedes-Benz

Specifications

OM651 (late)
OM648
Brand
Mercedes-Benz
Mercedes-Benz
Verdict
ACCEPTABLE
BEST
Reliability
72
90
Years
2014--2020
2002--2006
Displacement
2143 cc
3222 cc
Layout
I4
I6
Type
Diesel
Diesel
Power
136--204 hp
204 hp
Known Issues
2
2
Total Risk Cost
€800--€2,200
€450--€1,100

Character

OM651 (late)

"Post-2014: updated injectors + pump. Much improved. Highway excellent."

OM648

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

Issues Comparison

OM651 (late) 2

▲ HIGH
DPF blockage — city driving concern €500--€1,500 60,000 km--120,000 km
● MODERATE
EGR valve fouling (post-2014) €300--€700 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

OM651 (late) 10

A 180d W176 2014--2018 Hatchback B 180d W246 2014--2018 MPV C 200d W205 2014--2018 Sedan C 220d W205 2014--2018 Sedan C 220d Wagon S205 2014--2021 Wagon E 200d W212 2009--2016 Sedan E 220d W212 2009--2016 Sedan GLA 200d X156 2013--2020 SUV GLC 220d X253 2015--2022 SUV GLC 250d Coupe C253 2016--2019 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 OM651 (late) Report Full OM648 Report