Any model with an "s" suffix, such as 318is, 325es, and 325is, denotes the sport model, which only came in 2-door form. It can be easily recognized with its front spoiler with integrated foglights, rear decklid spoiler, and 14" BBS cross-spoke "basketweave" rims. It also featured a limited slip differential (optional on the 318is), bolstered sport seats, thicker swaybars, slightly stiffer shocks and front springs, and a leather-wrapped 3-spoke steering wheel (except '90 on, which had a 4-spoke leather-wrapped airbag wheel). The 325es and 325is also came with an on board computer, power windows/mirrors/sunroof, central locking, and a premium sound stereo system. In 1991 there was no official 325is model, although all of the aforementioned items were still available as the Sport package. Ah ok, thanks. Gruß Jochen