Poly-v-Belt Drive

What is your question?

On my 1994 E320 Mercedes-Benz the Poly-v-belt drive have a automatic belt tensioner. My question is that when one is replacing the car serpentine belt do they need to adjust the belt tensioner when the poly-v-belt drive have a automatic belt tensioner. Also, if one adjust the car poly-v-belt drive "automatice belt tensioner" can this cause damage to the car camshaft timing solenoid, short circuit and make the cam position sensor signal defective. Thank you.