Need Information on audi 4000's

[Deepak Vaidya <dv@welchlab.welch.jhu.edu>]

I am looking into buying a audi, and was wondering what are the major 
differences between a audi 4000, 4000S, 4000CS, and 4000CS quattro.  I have
also seen an audi that had 4E as part of the badge.  I went to the public
library but they dont seem to have any helpful information.
I will appreciate all the help the quattro group can give me.

Thank You
-Deepak Vaidya
dv@welchlab.welch.jhu.edu
   [128.220.59.10]