Mercedes DPF Regeneration
Supported coding features by StarCOM diagnostic tool https://www.obdtester.com/starcom
Diesel Particulate Filter (DPF) Regeneration
What it does
- Initiates forced regeneration of the DPF
- Burns off accumulated soot in the filter
- Restores normal exhaust flow and reduces emissions
When it is required
- After high soot accumulation detected by ECU
- When DPF warning lights or fault codes appear
- After extended city driving causing filter clogging
- When passive regeneration is insufficient
Conditions that must be met
- Sufficient fuel level
- Engine at normal operating temperature
- Exhaust system and sensors functioning
- Vehicle stationary or allowed speed for active regeneration
- Stable battery voltage
What happens during the procedure
- ECU increases exhaust temperature:
- Activates fuel injection post-combustion
- Controls turbo and EGR as needed
- Soot is burned in the DPF
- Sensors monitor filter temperature and pressure drop
If regeneration is not performed
- DPF may become fully blocked
- Engine power may be reduced (limp mode)
- Increased fuel consumption
- Warning lights and fault codes remain active
After regeneration
- Verify DPF backpressure in live data
- Check soot load values
- Confirm no DPF or emission warnings
- Perform normal driving to allow passive regeneration