Mercedes E‑Class (W212/W213)
E‑Class patterns: long-distance diesel use, emissions behaviour and sensor plausibility.
What to expect
- Some E‑Class diesels will store historic emissions codes after interrupted regens.
- Sensor plausibility issues can appear after low voltage events.
- DPF pressure sensor drift can mimic real restriction.
Typical OBD2 codes for this model
P2002
DPF efficiency – how to separate soot vs sensor drift.
P0401
EGR flow issues and practical diagnosis.
P0300
Petrol misfire – avoid unnecessary injector replacement.
Use the AI tools
Tip: If you have multiple codes, start with the code that appeared first, then use the Diagnostic Assistant with your symptoms and mileage.
Trust note: These profiles are designed to narrow possibilities. Confirm with test data (trims, misfire counters, pressure/smoke tests, voltage checks) before buying parts.