My buddie had the 2012 x5 diesel very impressive powerband but it was always something wrong with it and sure it was expensive to fix,they even sell some tuners if you get bored of the power,but now he has a 2014 cayenne its definitely a better car to daily and maintenance is way cheaper but why would you use these for tow vehicles there to nice lol.why dont you buy something thats ment to tow and would last forever .I would sugest a good old 99-04 ford f250/f350 with a 7.3 powerstroke,they last forever and dont break my cousin has two and beats them and the dont die.or even get a 03-05 dodge 2500/3500 with the 5.9 cummins those things are beast and take aw.e you through at them.