Hal, an S320 is a significantly different automobile from the 1994 E320 coupe you're accustomed to driving. I recommend driving any S320 you are considering buying extensively to ensure the ride and handling of a larger car suit you. An S320 will likely feel underpowered compared to your coupe. Then it's a question of whether you plan to work on the car yourself or you can afford to have an indie or a dealer perform routine maintenance. The 1992 thru 1999 versions can be prohibitively expensive to maintain, but I guess you already know/read that. I would opt for the short wheelbase car.

__________________
Fred Hoelzle