I am having a multitude of problems that have sprung up recently, but to start I have a fairly simple but possible dumb question, but on my 1985 300D, where exactly is the grounding cable located? It is supposed to connect the engine block to the chassis of the car.. I believe it is somewhere on the drivers side but I can't seem to find it.. is it accessible from above the car or do I need to go underneath? pictures or a diagram would be awesome.. have the manual but didn't see anything about it. thanks!