Door Hinge problems of the 2006 Volkswagen Jetta

Bought new vw Jetta sedan on 08/17/06. On 05/13/10 took the car to the dealer because of car decelerating while driving I. E. Dropping in seconds from 60 miles to 20 miles. It was taken to the dealer multiple times for the same problem. Dealer answer "unable to replicate problem" until warranty of four years expired. The problem continues even after the carbon accumulated on the throttle was cleaned and the fuel pump was replaced. Due to unsafe to drive, requested for the dealer to buy the car back as a lemon. The dealer refuses because the four yr warranty is over. Other problems experienced with this vehicle during this period: air bags lights going off, air bag cover falling off, trunk opening on its own while driving, rain water leaking inside the lining of the car, screws coming off a door panel, doors falling off the hinges, emergency switch falling inside panel, fuel cap not locking, recalls. Dealer recommending to replace the steering wheel column for 2,340.