2007 Volvo XC90 3.2 Geartronic Summum 7-Sitzer Summum

Engine and gear without problems. has 2 years TÜV and stands on 18" inch all-weather tires. The problem is, the car is currently only driving on gas. Had the car in a workshop and it was exchanged and tried a lot. I think it has something to do with electronics because everything was done mechanically. Those who know about gas systems should also find this quickly. Unfortunately, I haven't found anyone here in the area who gets it under control. Car is still registered. It is a re-import from the USA so Tacho shows miles. New brake discs rear