Hello municipality, astoundingly or fortunately, my Saab survived the km-stand of 200t to 300t without any unscheduled repairs. Now the fault memory with diesel particle filter is added. Doesn’t matter, so I thought I had this a few years ago by a stupidity: There I tried out an intermediate plug-chip tune part. The effect was there, more power and almost a liter less consumption. But after 2t km engine emergency program because of clogged DP F. At that time I found a capable free workshop in Bochum, which burned me free by means of a kind of computer, just by a corresponding control the filter. After 20 min the spook was over and I had rest for the next3 years. Now again in a workshop, this time in the Rhineland, one would never want to have heard of the free burning program. I should drive with additive, which lowers the soot burning temperature, at high speed 60km, if unsuccessfully then expansion and this too What is your opinion, should I look for a workshop that knows the free-burning program or have the part cleaned? VG Jörn