All belts are about 6mos. old and i cant keep them from making noise. I used Snap-Belt Dressing but the noise keeps comeing back.Any suggestions?

Have you checked the belt tensioner?

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Russell McMahon
Tulsa, OK
2001 CLK 320
1992 400se
1993 400e
2000 320ML

My car does not have one.

Your car has no provision to adjust the belt tension??!

Is that true?

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2012 E350
2006 Callaway SC560

So what is the solution?

Mine half year old belt did that, and the belt dressing helped temporarly, replacing it helped permantly. You could get your moneys worth out of your can of belt dressing then replace the belt.

I'm guessing the belt surface got glazed over, if you want to test that theory try cutting the glaze somehow, like with sand paper.