Just wondering if anyone has had any success with installing a late model Becker or Apline head unit along with its CD changer into a 1987 300D?

I would like to have the convenience of several CDs on demand while still, retaining a stock appearance - albeit, a decade or so newer.

A friend has a deck and changer from a CLK just taking up shelf space.

Can anyone advise as to wiring this unit up into an early 124?

Thanks in advance.

Tom