CAT1037 is for the FWD, CAT1034 and CAT1030 are for RWD models
CAT1034 / EURO 6 - RWD - Double Kit (Front & Back): https://www.vanarack.com/prod/catloc-anti-theft-device-cat1034-mercedes-vito-447-2015-on-euro-6-rwd-double-kit Please note: Not suitable for Vito Compact
CAT1030 / Euro 6 - RWD - Front CAT: https://www.vanarack.com/prod/catloc-anti-theft-device-cat1030-mercedes-vito-447-2015-on-euro-6-rwd-front-cat Please note: Not suitable for Vito Compact