Joollover....I've been familiar with VWAG products for almost 10 years, and really, I wouldn't own a Passat, and then an A4 if I felt they were poorly built cars. The site you...cited, is a bit biased as it's a site for people to complain about their cars.
Take a look at BMW: http://www.consumeraffairs.com/automotive/bmw.html
Honda: http://www.consumeraffairs.com/automotive/honda.html
Toyota: http://www.consumeraffairs.com/automotive/toyota.htm
All have numerous complaints and every car maker will have a few complete F-ups driving around. Also, instead of listening to your service guys, who I'd assume have the dealership's interest in mind, look up your specific state lemon laws and contact the state regarding them, not the dealership.
Yeah I realized that...I went to read BMW and Toyota right after I posted about Audi here so yeah it is pretty biased Ill check everything out with me dad ...and since its a used car (at my Audi dealership its that way) you have 1 month or 1,700 kms to return it, so if I realize that its freaking out on me within the first month, which happened to alot of the ppl complaining, then out the door it goes!