Okay so my 89 560SEL has been shifting harder and harder. No slipping just VERY hard shifts. I called my mechanic and he said there is nob on the right side of the transmission needs to be adjust and turn a half turn counter clock wise. It's has something to do with the vacumme system. Does anyone know how to do this? Where is the nob? How to I access it? He said its very easy to do. I'm clueless. HELP!!
