My engine is the inline six. The linkage was under the air cleaner. There were several short rods with ball joint type connections, and they were a little dirty, having collected dirt from previous lubrications I suppose. I just dabbed ATF on all the ball joints, and on the swivel points. It seemed pretty obvious where to apply, once I was actually looking at the linkage. Perhaps I should have disconnected all the ball joints, but as I was not really having any problems, and was just performing routine maintenance, I just dabbed it on, and under, and around. Maybe some of the other guys with more experience could give you better advice. The only difference I seemed to notice, was from taking out a little slack with the cable adjustment. My service manual CD had pictures of various linkages on different MB models.