Not applying to your vehicle, which I guess by Arthur's comments, is a ratcheting type tensioner; for the older model's, like my 220D, the tension of the tensioner is all controlled by a spring and oil pressure. This type of tensioner can be removed, then refulled with oil by pushing tension rod in a bath of oil to refill it, then bolt it back in. I just thought it okay for this post so as to distinguish between newer ratcheting type and older typers. I think I'm correct on this. If not, someone more knowledgeable please correct me.