Congratulations!!
Bluetooth audio streaming is fiddly but you should try re-pairing the phone when the iDrive is on the Bluetooth menu. Works for me but if you then plug the phone in using a USB you lose the BT again and have to repeat the re-pairing.
Agree re. Q5 seating position and ride comfort and would add that the auto is better in the X3 too. I experienced a lot of waiting for the Q5 to accelerate.
I'm over 2000 miles and still 35-36mpg average
. Disappointing but may be down to the choice of wheels/tyres and auto trans. I can drive very conservatively and manage up to 42mpg but I'm talking 60-70 on a motorway and dog slow elsewhere to achieve this. I'd prefer to drive properly and take the £££ hit. May improve after some more miles.