2.0 CDI (OM640)
2004–2012 · diesel · 1991cc · 140hp
Engine codes: OM640
Reliability, common problems and owner reviews for the Mercedes Benz A-Class W169 2.0 CDI (OM640). Check this before you buy used.
The OM640 2.0 CDI — economical and reasonably reliable, but the emissions hardware is the watch point: DPF warning lights on short-trip cars, plus injector and EGR wear with age. Fine with motorway use and maintenance.
Same engine, other cars
This is the same physical engine (OM640) sold under different names across brands. Reliability is broadly shared — cross-check these:
Known Issues
DPF warning / clogging on mainly short, stop-start trips.
Fix / Workaround: Regular motorway runs; clean/replace.
Repair cost: €200–€1000
Typically appears after: 120,000 km
Injectors and EGR wear with age.
Fix / Workaround: Service injectors; clean EGR.
Repair cost: €200–€900
Mileage Thresholds
After 200,000 km: DPF/injector attention.
Pre-Purchase Checklist
- ☐DPF history; prefer motorway use
- ☐Scan for injector/EGR codes
- ☐Economical with maintenance
Frequently asked questions
Is the Mercedes Benz A-Class W169 2.0 CDI (OM640) reliable?
Maint. Sensitive — The OM640 2.0 CDI — economical and reasonably reliable, but the emissions hardware is the watch point: DPF warning lights on short-trip cars, plus injector and EGR wear with age. Fine with motorway use and maintenance.
What are the common problems and reviews for the Mercedes Benz A-Class W169 2.0 CDI (OM640)?
The most commonly reported problems: DPF clogging (short trips), Injector / EGR wear.
Is a used Mercedes Benz A-Class W169 2.0 CDI (OM640) worth buying?
Fine if serviced correctly — but it punishes neglect hard. History and the right consumables matter.