I leased a 2008 audi a6, less then a year ago. audi has had my car now 3 times for a problem with the intake valves and carbon deposits. they have been unable to fix the problem and refuse to admit there is a problem with the car. it has been in the shop over the past 6 months for 15 days. i have had to continue paying for the car when it is un-drivable. i also paid for audi care upfront when i leased the car, and the level of care is pathetic. on the audi forums, there are many a6 and a4 owners having the same problem. this should be a federal recall. audi of north america has been impossible to deal with. they do not stand behind their product. as a consumer, why do i have to pay for a product that is unusable? *tr