Test drove a 2009 A4 3.2 Quattro. Loved the car, its super clean and has 51k miles, all maintenance is up to date, loved the V6. Dealership is asking 23900. I used the search bar and found a few things I want to ask about.

How can I test to see if the car has the "vibration" problem?
To my understanding the car cannot do bluetooth audio? Wtf?
Are there any issues that have become prevalent since the car came out?
Anything in particular I should check for?
Would you recommend this car? I am aware of the maintenance they require as I currently own a 2006 A4 2.0T

Thanks in advance!!