Is there anyone can help.my Car is a 320i petrol with 18400 miles on the clock.the regeneration of the particulate filter came on followed the book and it did not work.so I booked it in to bmw to get a forced regeneration ithought my warranty would cover it but no I was told that due to the fact that the car has done a 12o trips under 4 miles it was my driving style that caused the fault. I been told that I must at least drive the car for 30 mins once a week.iam now looking for a small car my wife to go to work as she does short journeys and in 8 weeks of driving it would need to be redone. This is a forty grand car .