No.

How many miles are/were on your belt tensioner, pulleys, serpentine belt, and water pup's replacement/history?

The belt tensioner may not be the singular cause or culprit. Serpentine belts are often the victim of other part(s)/component(s) failure. Can you post pics of your serpentine belt? Both inside and out would be helpful. Also, is your serpentine belt OEM Mercedes-Benz? The tensioner may have snapped loose/off, because of the serpentine belt's being thrown.




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