Hey gang need some help
New to BMW's and thanks in advance for any replys.

I know it can be done, but because it is not plug and play I am hoping someone has "been there , done that"

I have read till I AM crosseyed but many of the links are broken, pictures missing.
Something about not connecting speaker grounds, using an extra amp

All I really want is to play CD's in the Ol gal and I wanted to keep the BMW look.
My current system has the tape/AMFM/weather band, 10 speakers .
The CD 43 I have has the 17 pin connector that comes out of the donnor car , yes it is the one that has the M//3 logo

I also have a steering question I will post in another thread - thanks again!