Purchased genuine Audi BT interface to go with RNS-E multimedia with s/w version 0650. BT interface number 8P1862335.Problem being that the RNS-E will not display any functions or phone booklistings. The BT will communicate with VAGCOM and I have tried various codes to try tyo make it respond. My mobile will work with the BT but only by using handset to dial out and receive calls i.e can press anybuttons on RNS-E to answer or cancel calls.

 

What kind of phone are you using? I've heard Audi BT is not so great with some phones...

You will likely find much more help from Audizine.com or Audiworld.com.