3AG and 5DL TRSVC have the same SWFL and CAFD. Difference is hwel, but this is not a problem when "HWEL from SVT_IST" is used.
So load/read your fa with 3AG, "read ECU", choose your original build dates i-level, generate SVT_SOLL, press button "HWEL from SVT_IST" and then generate your TAL for flashing.
So load/read your fa with 3AG, "read ECU", choose your original build dates i-level, generate SVT_SOLL, press button "HWEL from SVT_IST" and then generate your TAL for flashing.