I don't use the "aux" voice command, so I can't comment specifically on that (looks like you have all the advice you need anyway). But I used to have more trouble with voice commands before I read here to wait for the symbol to come up on iDrive before you talk. That helped. Also, it works better with windows closed and HVAC fan turned down.
__________________
E90 330i Black Sapphire 6MT | 991.1 C4 Platinum Silver 7MT
|