Electronic Steering Lock (ESL) and Ignition Switch (EIS) Failures
Higher Maintenance Costs
Frequently asked questions
Common issues
M271 Engine Timing Chain Wear
7G-Tronic Valve Body/Conductor Plate Failure
OM642 Diesel Oil Cooler Leaks
Buyer tips
1
Always perform a thorough pre-purchase inspection by a Mercedes-Benz specialist, focusing on rust points and engine/transmission diagnostics.
2
Verify service history meticulously, especially for timing chain replacement (M271) or transmission fluid changes (7G-Tronic).
3
Check for rust, particularly on early models, around wheel arches, door bottoms, and trunk lid. This can be a significant hidden cost.
4
Pay attention to engine noise (rattling indicates timing chain issues on M271) and transmission behavior (harsh shifts, delays).
5
Test all electronic components, including windows, climate control, infotainment, and especially the steering lock mechanism.
6
Consider buying a facelift model (post-2011) to mitigate some of the earlier generation's common issues, including rust prevention and updated electronics.
