Major Problems in Audi cars and Bad After Sales Service

Although, Audi is a great car to drive (as long as its working fine), but out the 2 years I have been owning my A6, the car has been at workshop in all for more than 6 months. They have moajor problems with circuits. Every couple of months some electric or circuit malfunction will come in the car and then the car will be in workshop for easly a month due to unavailablity of spare parts. After sales service is horrble too as most of the time they do not give an early appointment to take a car which has broken down nor a replacement is given. Very disappointed to buy an Audi car, should had opted for Merc or BMW.