I found this on another forum and was wondering whether VAG-COM can do the same for my2006 Passat. Thought it would be useful to see how driving style would effect the DPF, and as a preventative measure:

Doing 1,900rpm in 5th = 58mph worked for me this morning. I had the benefit of the RAC man's Laptop (briefcase size really) connected up; initially showing DPF 54% full (sooted up) and progressively getting the soot burnt off and going down all the way to 0% over about 10 miles