Mercedes-Benz 300D W124 — Reliability

W124 Sedan Executive 1993–1997 1 engine

Reliability Summary

Engine OM606 — 96/100 BEST
Known Issues 2

Engine in this model

BEST 96

OM606

3.0L NA Diesel I6

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

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Known Issues Across All Engines

Issue Engine Severity Onset
Glow plug failure (only meaningful issue) OM606 minor 80,000 km – ∞
Injection pump seal wear (age-related) OM606 minor 200,000 km – ∞