so i'm also prepping for this mod. got my gps head unit picked out already, but am struggling with the dash kit.
i really don't like the nav unit on the bottom. it's blocked by the shifter in 1, 3, & 5 positions.
so i found this install kit:
it seems to fit flush to the dash and retains the correct positioning of the radio on top.
only problem seems to be the "trimming" that has to be done in prep, including cutting some pieces of plastic off the sides of the hvac unit.
what tools could be used to get this done?
this company also make a handy steering wheel and rear park distance control adapter for those connections. that's pretty cool.
EDIT: for E90 & E91 only....