Just joined and took delivery 2 weeks ago of a 2014 Audi Q7 TDI Prestige with air suspension. We got this car b/c we want to tow our 6k lbs. travel trailer. I did the first test last week from the Phoenix valley up to Payson. It did just fine, 65mph the whole way and 60 on that last 10m hill into town. 9.6mpg on the way up and 11.5 round trip. But it was only 75 degrees not the 110 like July... so the jury is still out.
The air suspension is really the star of the show. We've gone through several tow vehicles: 7.2L Excursion, 6.2L H2, 2019 Expedition Platinum, and now the Q7. The Q7 is more stable than the Expedition and about as stable as the H2. The Q7 pulls stronger than the H2 and Excursion.
I used the torque app to monitor temperatures and everything behaved nicely. But I could not monitor the Tranny temp (even though the app says it has it). The tranny temp and coolant temp were reading in lock-step so that's why I think it wasn't truly the tranny temp.