I need the color code wire diagram for the base radio on a 2009 MCS

 

Color codes at what location? The back of the radio? X9331 connector by the driver's door? What are you looking for (I might be able to help) -- the colour codes for the X9331 connector are in the R56 speaker swap thread.

 

I'm looking for the color code at the back of the radio.
Thanks for your help

 

I just used the x3991 connector, tapped the speaker wires off those, ran it to my new head unit, ran a new power and accessory and dimmer line, got an adapter for the antenna, and bam, new radio. Check out the navigation/audio forum for the R56, My setup is under the double din install thread.

 

everything you could need to know is in this thread:
https://www.northamericanmotoring.co...nt-how-to.html

The wiring diagram should be somewhere in the first several pages.