Laso Accessory Belt Tensioner

!/2 the price of the part from MB and about the same quality. These go bad when the 'rubber against metal' gasket breaks down within one to five years depending on driving mileage, etc. Laso Accessory Belt Tensioner I believe LASO is also an OEM Mfr. for MB so quality should be same as buying part from them. When you do this job, be sure to replace the Serp belt too. The Conti belt will add a whopping $28 to your job so do it at the same time.

not up to MB quality.