this has been a problem since i bought the car i have had long squeaks when the gear changes or 0-20 acceleration... it only happens with the ac on and sometimes the ac doesnt come cold after driving it for a while but when first started it comes real cold. my question is how can i tighten the belt with the belt tensoner. also theres a rattleing noise where the damper in the engine is but another fellow benzworld said it needed bushings. where can i get the bushings? can i buy it from a dealer or do i have to buy a whole new damper?