Redd

I'd suggest a trip to the library, ask the reference desk for the Consumer Reports annual issue on cars. There have been a number of changes in engines and transmissions on the Q5 in recent years, and some of the older ones didn't get high marks for reliability.

As folks have mentioned, repairs WILL be expensive, and at 45,000 miles that's the time when you may need brake$, tire$, fluid changes...But if the price is right, and if the car needs no maintenance (routine or otherwise) or if it comes with a respectable warranty....it could be worth doing. Assuming that engine and tranny got good marks for reliability, because they will be DAMNED expensive if they need work.

m1964

WP and DRL module. Fuel door solenoid replaced (or fixed) under warranty. All happened in the first 1-1.5 years. Sunroof did not close couple of times recently-fixed myself by cleaning too much grease (it was "lubricated" by the dealer at every service), and by using proper Audi silicone lubricant.
No carbon problem.
I love the ride-much better then my 2 y. o. RX 350. Love 3.2L+ 6-speed auto combo: no gear "hunting" as in new 8-speed.

asquew5

New owner of '14 q5 tdi and we love it. Especially the torque! Great gas milage and wonderful road manners. My only con are the brakes are not as good and quick as our A5. But probably because of the weight. You should test drive one.