I don't think these two units are compatible... if the cd changer comes from a 93 car's factory system, and from your desription my guess is that it's an alpine 6 cd changer, that works with the BE 1432 two piece head unit... you need the newer cd changer with the 10 pin connector that works with the BE1492+ headunits

__________________
95 M3 (US)
94 318is (EURO)
87 190E 2.6