Hello, my car was tuned by Heuschmid. I had a 94 900/II 2,0Turbo implemented the following conversions: Viggen charging air cooler, Viggen turbocharger, 3″Hirschauspuffanlage ab kat,larger charging tube and allegedly lt. Heuschmid an adapted deer control unit!!! But the problem is not better than how, where the vehicle was only available with a control unit!!!!!! What can this be about?????