What Month/Year did the BMW/Pioneer KE-83ZBM come in? And how to install in 87 E30?

[IS300E30]

This is what the radio looks like:

http://www.ebay.com/itm/BMW-E36-E34-DECK-TAPE-CASSETTE-KE-83ZBM-PARTS-OR-REPAIR-UNTESTED-IN-DASH-HEAD-/281330453289?pt=Car_Audio_In_Dash_Receivers&hash=item41809a0b29

I do not know how to post pics on here, so, this is one on Ebay just to show what it looks like.

Also, how difficult would it be to install this car with an 87 e30 convertible with the fader switch on the dash?