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When replacing the old serpentine belt: See detail box below on 1994 Mercedes-Benz E320

When replacing the old serpentine belt do a technician need to adjust the car automatic belt tensioner

it is spring loaded and should tension itself
Thank u I was thinking the same thing myself and wanted to make sure. R u a certified mechanic
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1 more answer
no, the tensioner is spring-loaded...however make sure the mechanic checks the spring action...some tensioners loose spring tension.