Turn Signal Flasher Unit problems of the 2002 Volkswagen Cabrio

Purchsed vehicle new. . Have returned it various times for engine light - first time was six months after it was purchased. So far I have had the engine sensor gauge replaced twice, a gas sensor replaced once, the O2 sensor replaced twice. I too have had to take my car in three times for the rear lights malfunctioning - the last time the repair technician 'missed' a wiring issue; the vinyl near the power window controls is peeling off for the second time (first time vw replaced at no cost after I complained to vw american); with just 45000 miles on the vehicle I have replaced the brakes (at my expense at 22000 miles) and have replaced the tires. In the three years since I purchased my car it has been in the shop at least a dozen times not counting the 5000 mile oil changes. All work has been documented so that I can prove that the vehicle has been properly maintained.