Front Air Bag Sensor Control problems of the 1996 Volkswagen Jetta

I am dubious about the safety of a well maintained car when the transmission fails in the first 6 months. The manufacturer's serviceman jumps the battery against owners manual recommendations and blows the internal fuse for the radio and sets off the airbag sensor (neither repaired by the dealer at no charge. Also,) tires needing replacement at less than 20,000 miles - lock cylinder fallling out of driver's side door- and all the power locks failing, resulting in having to go to the dealer just to get out of the car.