I'm having very similar trouble. Retro fitted RCD510 and 9w2 bluetooth to ED30 ( headunit is 3C8035195A) with microphone, the whole oem kit and caboodle. Got bored of not being able to control the phone or music streaming via bluetooth from the headunit. I updated the CAN before I even started the whole thing. Keep seeing people going on about checking software on headunit via a long press of the setup button but all that does is bring up FM/AM/DAB tuning stuff with no hint of finding what version I have. I'll probably need it updating but the real problem is that I've now fitted a 9w7 bluetooth module and I now have nothing. It says it's connected to my iPhone and shows as such on the headunit but thats it. Can't make or receive calls either from phone or headunit and i can't stream music anymore although it did for just a few seconds then just said NO.
Anyone got any ideas ? Am I missing something in coding ? Or am I going to have to attack it with a sledgehammer ? Is it possible the module is faulty? I wouldn't have thought it would work at all and show no connection if it were faulty but it looks like i know absolutely zero.
HELP