Experts,
I have an 2006 E53 4.4i. The rear view mirror displays direction. Since I have a NAV, that direction is useless so I want the rear view mirror to display external temprature or something else..I can see that by shining a light at the led display it is capable of displaying other things such as temp etc..but haven't found any controls to make it work.

Another question..has any one figured out if you replace the cassette deck behind the NAV with a single CD player or changer...I know about the trunk changer and all the details. I am talking about replacing the cassette with the CD player/changer behind the NAV.
Judd.