What changes
Central electrics 09 long coding, byte 10, bit 5 = 1 (welcome_light). The lights by the doors come on when unlocking and getting out.
Details
Requires puddle lights in the mirrors or doors. To turn off, set the same bit to 0. A long coding parameter of the MLB Evo central electrics unit (J519). One bit changes, the other bytes stay. 09 coding on MLB Evo usually needs no access code; from model year 2019 the unit may accept changes only with the bonnet open. If the unit is SFD-protected, a3c warns before writing.