I've recently had the 9zz bluetooth installed in my 2010 R36.

I'm able to make/receive calls and stream music from my phone no problem at all. The issue I'm having is when I turn the car off, the screen goes off for a couple of seconds and then comes back on and shows the following on screens (in sequence):

"No network - no user connected"
"Telephone initialisation"
"No user connected"
"Telephone initialisation"
"No user connected"
"Telephone initialisation"
Screen then turns off

It takes about two and half minutes for this all to cycle through before the screen turns off and stays off.

I've had it checked via a VCDS cable and they can't see what's causing this to happen.

Does anyone have any idea what might be causing this?

Cheers