Models 963, 964 Special tools 87 Introduction of the New Truck Generation - The New Arocs (Model 964) i – This printout will not be recorded by the update service. Status: 01 / 2013 – Adapter Use Angle piece and holder with magnets, for various inclination measurements on the propeller shaft and the propeller shaft flange. Special tool number W 001 589 91 21 00 FG 41 Set B Category Mercedes-Benz Truck - Basic Operation Note In combination with W 001 589 88 21 00