You won't have this problem anymore as soon as you modify it by adding ga.14 x 3" long tension spring hook towards a piece of plate 3/16 x 1 x 4 with 2 holes bolted on the power steering resevoir, just change the two bolts to make them a bit longer. The whole thing serves as a counter tensioner which help the molded rubber thing. I got tired of replacing the whole tensioner unit (3 times at $200.00 each) so i made changes and after 8 years it doesn't bother me anymore. Apparently, its a lousy MB design.... imagine a molded rubber on an aluminum casing that serves an enormous torque? that small shock absorber doesn"t help much either.... Good luck...