W116

You can do it without this fitting but you will have to try to get one hose end of your tester under the engine to hook up to the WUR.

Very hard to find and VERY expensive if you can find another.

BETTER THAN OE! For OM617 turbo engines from 1981 to 1985. Custom machined and welded in our shop with a much stronger threaded adjusting shaft than the original