Features and Benefits: Mercedes-Benz fan clutch holding wrench holds the water pump pulley to allow release of the fan; BMW fan clutch holding wrench holds the water pump pulley in place while loosening the radiator fan; Mercedes-Benz fan clutch wrench removes the thermo-viscous radiator fans found on Mercedes-Benz and Ford vehicles; Mercedes-Benz fan clutch wrench is used to remove or install the fan clutch assembly; BMW fan clutch wrench is used to remove and install the thermo-viscous fan on BMW's and Fords (32mm opening); Mercedes-Benz Fan Clutch Holding Tool is used to remove / replace thermo-viscous fan coupling with the radiator in place. Universal fan belt adjustment wrench services Mercedes-Benz, Nissan Quest, and Mercury Villager radiator fans and pulley belts. It also can be used for loosening the A/C idler pulley tensioner lock nuts for A/C belt adjustment or replacement Also contains 2.5 mm, 8 mm, and 10 mm Allen keys.