When I bought the CD43 a few months ago to put in the e30 I also bought a Grom IPD4, Bluetooth dongle and USB aux in connection as I wanted full functionality but for everything to be hidden.
The music part of he Grom works fine but the bluetooth seems not to be working right for me.
When I pair my iPhone 6 (iOS9.3.2) to the Grom it connects fine but the second time I try to connect my phone says it can't connect and to make sure the Grom is on and within range.
I have reset it a few times and there's no change. It has been tried with an android phone and there doesn't seem to be any problems.
I've sent an email to Grom buy thought I'd check if anyone else has had similar issues?
Cheers
John