M274 vs OM648

Side-by-side reliability comparison

Higher reliability score
OM648 BEST 90/100
+18 points over M274
0 / 100
ACCEPTABLE M274 Mercedes-Benz
0 / 100
BEST OM648 Mercedes-Benz

Specifications

M274
OM648
Brand
Mercedes-Benz
Mercedes-Benz
Verdict
ACCEPTABLE
BEST
Reliability
72
90
Years
2012--2019
2002--2006
Displacement
1991 cc
3222 cc
Layout
I4
I6
Type
Petrol Turbo
Diesel
Power
184--211 hp
204 hp
Known Issues
3
2
Total Risk Cost
€2,150--€5,400
€450--€1,100

Character

M274

"Improved over M271. Dual-row chain. Thermostat main issue. Reliable with care."

OM648

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

Issues Comparison

M274 3

▲ HIGH
Oil consumption — piston ring design (early units) €1,500--€4,000 60,000 km--120,000 km
● MODERATE
Thermostat failure €250--€500 60,000 km--130,000 km
● MODERATE
Camshaft adjuster / actuator noise €400--€900 80,000 km--160,000 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

M274 12

C-Class W205 2014--2018 E-Class W212 2013--2016 GLK X204 2012--2015 GLC X253 2015--2019 E-Class W212 2013--2016 GLC X253 2015--2019 C-Class W205 2014--2018 E-Class W213 2016--2020 E-Class W213 2016--2020 C-Class W205 2014--2018 C 200 Wagon S205 2014--2021 Wagon GLC 200 Coupe C253 2016--2023 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 M274 Report Full OM648 Report