im just getting started on my beautiful 75' 280 and the vacuum system is a mess. ive done tons of work on the w123 mercs, but never on the w115s. The mercedes vacuum system has always been a mystery to me, and a diagram would certainly make a difference. ive searched google and any books i could get my hands on, but i cant find anything in the way of a full car diagram. if you guys have anything it would be greatly appreciated.