Very good vehicle, but the repairs are expensive as the miles add up. I’ve had my A6 quattro for a little over 8 years & 150.000 miles. I bought the car with 47,000 miles & no problems until 98,000, then the serpentine belt tensioner broke. I went ahead a serviced the timing belt, water pump, etc. Later bought shocks from Germanautoparts.com & they are vastly superior to stock. The vehicle feels rock solid on the road and tracks straight with minimal input from the driver. Find yourself an Indie mechanic. I go to my local VW dealer for oil changes & some labor. VW parts are cheaper than Audi parts (SAME PARTS). Also, labor charge at Audi dealership is twice what VW dealer charges…Go figure.
Quattro all-wheel drive is excellent in rain or snow. Heated seats are very comfortable and conform to my medium/large size body well. Bose stereo sounds crisp & clear. I like the the looks of the car. Even though it is 15 model years old this year (2014), it is still a good looking machine. I think the new Ford Taurus and one of the Kia models have the same basic outline of their bodies. If you can find one with less than 50,000 miles, I would recommend buying it. Beware… as the miles increase the repairs go up & I fortunately have a mechanic who’s also an Audi owner. He does quality work at a fair price. If not for him I would have sold my A6 long ago.
needs more power (which was fixed on newer model years by changes in the transmission gearing, I think). Control arms & suspension components wear out too quickly. Need to use timing chains instead of timing belts (belts break, chains slip).