OM651 (late) vs OM606

Side-by-side reliability comparison

Higher reliability score
OM606 BEST 96/100
+24 points over OM651 (late)
0 / 100
ACCEPTABLE OM651 (late) Mercedes-Benz
0 / 100
BEST OM606 Mercedes-Benz

Specifications

OM651 (late)
OM606
Brand
Mercedes-Benz
Mercedes-Benz
Verdict
ACCEPTABLE
BEST
Reliability
72
96
Years
2014--2020
1993--2001
Displacement
2143 cc
2996 cc
Layout
I4
I6
Type
Diesel
Diesel
Power
136--204 hp
134--174 hp
Known Issues
2
2
Total Risk Cost
€800--€2,200
€280--€700

Character

OM651 (late)

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

OM606

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

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

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

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

OM606 2

300D W124 1993--1997 Sedan E 300D W210 1995--2003 Sedan
Full OM651 (late) Report Full OM606 Report