Originally Posted by Acemetrical
This is really promising stuff. I have a Nov 2006 e90. I've heard that cars post Mar. 07 have different electronics, and therefore could be retrofit. However these instructions don't specify date, just the series. Therefore, can pre-Mar 07 cars take advantage of this?
After all, Since all cars post Mar 07 have the hub anyway, it seems redundant that they would have "retrofit" instructions...
It specifies radio level 2 which might coincide with March 07.
Several of the wiring connections are to the back of the radio.
Not all post-March 07 cars have the hub.