I may have an opportunity to purchase a 1998 Z3 2.8 with ~70K on the ODO and was wondering if there are any known weaknesses with this chassis and drivetrain. The price seems pretty reasonable, but I haven't actually seen the car yet and need to know what probing questions to ask the current owner. My intuitive short list of potential issues includes leaks in/around the convertible top, and water pump, radiator, clutch, brakes and electrical problems. I want to make sure I don't miss some known but not-yet-apparent problems with this model/year that might lead to early post-purchase regrets. I fully realize that no BMW is cheap to maintain properly and that no one can say for sure that something expensive will never break. I just don't want to end up kicking myself for not going into this with my eyes wide open.

Many thanks,

Bob