This function cleans the particle filter from soot particles by burning them off using an increase in the exhaust temperature. Regeneration is normally handled by the engine control module but, e.g., during city driving, often sufficient exhaust temperature is not reached to start a regeneration. Then the car has to be driven a longer distance at a constant speed of at least 60 km/h. If you're still unsure if regeneration has been run, you can request that it is started with this function. If the particle filter is clogged by soot, regeneration may be blocked after a short time. Then a regeneration must be run by driving the car at a constant speed for approx. 30 minutes, at a speed of at least 60 km/h. Then regeneration of the particle filter can be run with this function.
Test conditions:
Ignition on, engine off.
No faults in the system.
Fuel level at least 10 litres.
Procedure:
Start the function.
Press "OK" to request a regeneration in the engine control module.
Turn off the ignition for 30 seconds.
Start the engine.
Drive the car at least 20 minutes at a constant speed of at least 60 km/h.
Regeneration of the particle filter is started as soon as the coolant temperature has reached 75 °C and the exhaust temperature exceeds 240 °C.
Status of regeneration is shown in data list parameters, there it is also possible to read off driven distance after the latest regeneration.
If regeneration does not have time to finish, it will resume during the next driving cycle, as soon as the coolant temperature has reached 75 °C and the exhaust temperature exceeds 240 °C.
The function is done.
If the function fails, check the test conditions and repair any faults.