Alternator Pulley (Decoupling) 2014-2016 4 CYL ONLY
Only for 4 Cylinder engine models with OM651 diesel engine.
This is the identical OEM INA pulley sold at a franchise Mercedes dealer.
To check the integrity of your
alternator pulley, simply remove the belt and place a screwdriver into
the front of the alternator cooling fan to stop the armature from
rotating. Then turn the pulley by hand. If it moves one direction but,
not the other, it is functional. If it will not rotate at all, it has