In the towing capacity battle, the Q5 fairly thrashes its named competitors -- the BMW X3, Infiniti EX35, Land Rover LR2 HSE and Lexus RX350. All can tow cargo, so long as it's less than 3,500 lbs (or 1,500 lbs in the Acura RDX's case, and none in the Infiniti's). Meanwhile, the little SUV from Ingolstadt can haul 4,400 lbs
This is taken from a Motortrend article online, "
http://wot.motortrend.com/6415385/auto- ... x.html"but doesn't answer the warranty question. I would think it the authorized dealer sells and installs it the warranty would be valid
Price quote was somewhere between $850 and $1000