VW Part Number - B 000 750 M3In the below thread for Polo's a user called Veteran states "My Driver's Manual actually states that if 501-14 cannot be obtained from a VW dealer, then any DOT4 complying with DIN ISO 4925 Class4 or US FMVSS 116 DOT4 can be used."https://uk-polos.net/viewtopic.php?t=73523