I've test drove the q5; its a beatiful small crossover with an excellent drive. However, doing some more research online I found out this car has a lot of reliability problems.
I guess 2010 and before, Audi was cutting corners and were using plastic fuel pumps which were failing before 15,000km leaving their owners on the side of the road. They've since changed to metal fuel pumps.
Others are having trouble with the 8 speed transmission (hesititation between 1st and 2nd gears --- audi won't acknowledge the problem) and sludge building up with the turbo motor.
Shaking wheels are also being documented. True Delta paints a similar picture, last time I looked over 95 problems per 100 vehicles, much lower reliability than average. CR finds similar findings.
If you look at some of the audi forums, some love it, others swear never to purchase another audi again after their experience with the Q5. Another note, good luck finding a deal on one of these, they wouldnt budge from MRSP up here in Ottawa and the wait was 6 months.