Greayt job, Dave. Did I miss in your posts or did you mention that for at least some part of the 80s, the 's' stood for the Sport version of each series? Hence a 325i and a 325is were differently suspended, the S version had sportier appointments inside, etc.

__________________
David

His:
2003 Dodge Durango SLT
2002 BMW E39 530i Sport
1988 Mercedes 300TE
Hers:
2003 Chevrolet Suburban
1999 E430