Welcome to xoutpost.com. FYI you posted this in the wrong forum. It should be in the e53 forum or electronic forum. No big deal tho. Anyways if you have a NON-DSP stereo. You might be able to install it in the left compartment in the cargo area. Not were the CD changer is but if you look down there should be a large hole that pretty deep. I installed my Sub amp in there and its totally hidden. I can even adjust the gain since the adjusters are facing up. BTW the mods will move the post to the right forum. Enjoy this site, Rob

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