To all who gave me comments, advice and feedback, I was abled to get a hold of a very good friend who knows how to repaired these type of things. He did not have to remove the water pump or power steering pump as some of the people suggested to get access to the tensioner and the adjuster rod. I saw parts of what he did but did not want to bother him. All in all, it took him about 3 hours to remove the tension rod adjuster and replace with a new one. He must have quite a few tricks up in his sieves. Also, the new adjuster rod nut in which the threads from the old adjuster rod nut were removed. I saw the old adjuster tensioner rod and it was ugly. Broke in half and the rod itself was bent, too! Boy, I cannot tell how much I am so relieved with the right people to help out on the Mercedes. The Mercedes e320 station wagon runs a lot better and smoother like a new car. I am impressed with all of you out there taking the time reading and writing helpful hints and comments. Thank you all and you guys rock!!!