Have you ever done a head gasket before? Any head gasket. It's a lot of work. Can be hard. Not complex, just hard. Like losing weight (it's hard, but not particularly complicated). The MB dvd for W201 cars is pretty good. Also, AllData offers a single-car online data subscription for $25 per year. So if you plan to keep this 190E for a while and also try to do your own work, it's less expensive than the dvd and a lot of people like the format. If you have a public library close-by, you can get the same AllData information out of most library data banks. But then there's all that printing and the return visits. Good Luck.