Mercedes-Benz GLE 350d W166 — Reliability

W166 SUV Large SUV 2015–2019 2 engines

Reliability Summary

Best engine OM642 — 82/100 BUY
Worst engine OM656 — 82/100 BUY
Average reliability 82/100

Engine Comparison

Engine Reliability Score Verdict Known Issues
OM642
3.0L V6 Diesel 		82/100 BUY Valley oil cooler seal failure — #1 issue +2
OM656
3.0L Diesel I6 		82/100 BUY DPF + EGR — diesel city driving concern +1

Engines in this model

BUY 82

OM642

3.0L V6 Diesel

Legendary V6 diesel. 250k+ km. Fix swirl flaps and enjoy.

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BUY 82

OM656

3.0L Diesel I6

Flagship modern MB diesel. Inline-6 smoothness returns. MHEV. GLE/GLS/S-Class. Excellent highway. Ea...

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Known Issues Across All Engines

Issue Engine Severity Onset
Valley oil cooler seal failure — #1 issue OM642 high 80,000 km – 150,000 km
Intake swirl flap actuator failure OM642 moderate 60,000 km – 130,000 km
BlueTEC NOx system / DEF issues (where fitted) OM642 moderate 60,000 km – ∞
DPF + EGR — diesel city driving concern OM656 moderate 60,000 km – 120,000 km
AdBlue / SCR system consumption and faults OM656 minor 30,000 km – ∞

FAQ

Is the Mercedes-Benz GLE 350d reliable?

The Mercedes-Benz GLE 350d has 2 engine options with reliability scores ranging from 82/100 (BUY) to 82/100 (BUY). Average reliability: 82/100.

Which Mercedes-Benz GLE 350d engine is most reliable?

The OM642 is the most reliable engine in the Mercedes-Benz GLE 350d, scoring 82/100 (BUY).

What problems does the Mercedes-Benz GLE 350d have?

Across all engine variants, the Mercedes-Benz GLE 350d has 5 known issues. The most common are related to Valley oil cooler seal failure — #1 issue, Intake swirl flap actuator failure, BlueTEC NOx system / DEF issues (where fitted).