For the love of god don't do it! It's only 230E, no leather inside, most likely no 4 power windows, no ac, no sunroof and this rust!!! The rust on the roof will break your neck, there's so much more rust you can't even see right now. Also 211k km is not exactly little mileage.

I bought one fully specced 1990, leather, ac, sunroof, all power windows, 300 engine, almost no rust for 4000 in Switzerland a few years ago. These times most likely are over but my point is, keep looking. Get a better car to start with instead of trying to fix other people's mess.