take a bar of soap and rub it on the belt both sides of the belt, this quiets mine for a few days, mine is caused by a misaligned/bad tension pullley (cheap ass replacement Meyle) going to order the Febi pulley.

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1993 Mercedes Benz 300D 2.5 205K (ex wife's)
1984 Mercedes Benz 300SD 320K (SOLD)
2004 Mercedes Benz C240 75K
1995 GMC Sierra 2WD 5.7L 188K
1983 Mercedes Benz 300SD 239K (SOLD)
1987 BMW 325i 220K (SOLD FOR SALVAGE)

609 Certification