200q20v Digest, Vol 91, Issue 6

[George Sidman]

Sounds like you have the sedan, not the Avant (wagon).  I have the old 
radio out of my '91 200 Avant but it won't fit the Bose layout you 
have.  I concur that the best approach is to get ahold of a Crutchfield 
catalog and work with them to get a head unit that works with your 
speaker setup.

Where are you located?  I, like many others on this list, have buckets 
of 200 parts, gathered over the years, and can help you along.......
-- 

George Sidman
831 601-1776
George at gsidman.com