I will try to do that. Will they really answer with a real answer?
Anyways, I got my car back today from the 180,000km service. As I suspected this did not help! They could not find any problem with the DPF. No fault code and no wierd sensor readings.
The mechanics can't really do much without their computer! Sigh
Seems like I will have to try fix this problem myself! First off is try change DPF pressure sensor and blow out all soot and stuff from the pipings.