Sounds like a very reasonable price with those miles. In your first post I mentioned fuel leaks. Sometimes when these cars are not driven much, they become more prevalent (orings dry out; fuel types change) so pop the hood and look for wetness every once in a while during the first month or two.
Enter your VIN here and it will give you a list of everything the car came with. It elaborates a little more than the sticker will.
http://www.mbclub.ru/mb/vin/?lng=eng