Head unit help
 

Is there a HU that will fit in the Business CD slot without disturbing the MID display? Also where is a good place to see aftermarket HU installs in E53's

The slot itself can hold a standard din size radio. The problem is that the MID has an unusual shape and actually extends over the bottom part of the slot. So you can't have both. You have to choose one or the other.

If you search this forum you can find pictures of aftermarket radios installed. Most of them are double-din installs.