M274 vs OM606

Side-by-side reliability comparison

Higher reliability score
OM606 BEST 96/100
+24 points over M274
0 / 100
ACCEPTABLE M274 Mercedes-Benz
0 / 100
BEST OM606 Mercedes-Benz

Specifications

M274
OM606
Brand
Mercedes-Benz
Mercedes-Benz
Verdict
ACCEPTABLE
BEST
Reliability
72
96
Years
2012--2019
1993--2001
Displacement
1991 cc
2996 cc
Layout
I4
I6
Type
Petrol Turbo
Diesel
Power
184--211 hp
134--174 hp
Known Issues
3
2
Total Risk Cost
€2,150--€5,400
€280--€700

Character

M274

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

OM606

"Legendary. 500k+ miles documented. Tunable to 500hp. One of most reliable engines ever."

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

OM606 2

○ MINOR
Glow plug failure (only meaningful issue) €80--€200 80,000 km--∞
○ MINOR
Injection pump seal wear (age-related) €200--€500 200,000 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

OM606 2

300D W124 1993--1997 Sedan E 300D W210 1995--2003 Sedan
Full M274 Report Full OM606 Report