The pre-2000 models had an eight-key limit; be sure that you have at least a spare key and also the valet key before you buy. Check with the service dept at that dealer or call another one with the VIN and have them check with MBUSA first to see how many keys can be purchased down the road. As rediculous as this sounds, the pre2000 models had a primitive antitheft computer that only accepted eight keys before the whole thing had to be replaced. Depending on how many people owned the car previously you can get in a bad spot. Check my other post and replies on this matter, particularly from Gilly.