Part number: MER-0002021719 is a new, unused Genuine Mercedes drive belt idler pulley. Drive belt idler pulleys are typically inspected for replacement at manufacturer's suggested service intervals. An indication that you may need to replace the pulley include any of the following: 1) There is play in the bearing; 2) the pulley is out of alignment 3) the pulley is squealing (because the bearings are bad)
Mercedes understands the importance of offering the best Genuine Mercedes parts for its uncompromising customers. Mercedes knows you expect the absolute best quality parts for your vehicle and Mercedes is uncompromising on quality just like the customers that purchase their vehicles.
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