M270 vs OM656

Side-by-side reliability comparison

Higher reliability score
OM656 BUY 82/100
+12 points over M270
0 / 100
ACCEPTABLE M270 Mercedes-Benz
0 / 100
BUY OM656 Mercedes-Benz

Specifications

M270
OM656
Brand
Mercedes-Benz
Mercedes-Benz
Verdict
ACCEPTABLE
BUY
Reliability
70
82
Years
2012--2018
2017--present
Displacement
1595 cc
2999 cc
Layout
I4
I6
Type
Petrol Turbo
Diesel
Power
122--218 hp
243--330 hp
Known Issues
3
2
Total Risk Cost
€1,400--€3,100
€500--€2,000

Character

M270

"Transverse M274. Solid compact MB. Chain lifespan ~130k km."

OM656

"Flagship modern MB diesel. Inline-6 smoothness returns. MHEV. GLE/GLS/S-Class. Excellent highway. Early data strong."

Issues Comparison

M270 3

● MODERATE
Camshaft actuator / solenoid noise €300--€700 80,000 km--150,000 km
● MODERATE
Timing chain stretch at ~130k km €800--€1,800 100,000 km--160,000 km
○ MINOR
Intake carbon buildup (DI) €300--€600 80,000 km--150,000 km

OM656 2

● MODERATE
DPF + EGR — diesel city driving concern €400--€1,200 60,000 km--120,000 km
○ MINOR
AdBlue / SCR system consumption and faults €100--€800 30,000 km--∞

Models

M270 28

GLC X254 2022--present C-Class W206 2021--present C-Class W206 2021--present CLA C118 2019--present A-Class W177 2019--2025 A-Class W177 2018--2025 CLA C118 2019--present GLA H247 2020--present GLA H247 2020--present B-Class W246 2011--2018 CLA C117 2013--2019 CLA C117 2013--2019 GLA X156 2014--2020 A-Class W176 2012--2018 GLA X156 2014--2020 A-Class W176 2016--2018 B-Class W246 2011--2018 A-Class W176 2012--2018 A-Class W176 2012--2018 CLA C117 2013--2019 GLA X156 2014--2020 GLA H247 2020--present B-Class W247 2019--2023 CLA C118 2019--present A-Class W177 2018--2025 A-Class W177 2018--2025 CLA C118 2019--present B-Class W247 2019--2023

OM656 3

E 400d W213 2016--2024 Sedan GLE 350d W166 2015--2019 SUV S 350d W222 2013--2020 Sedan
Full M270 Report Full OM656 Report