What changes
Unit 05 (access and start), object 0574 or 1304: byte 0, bits 4 and 5 = 1. The start button lighting gently “breathes” when the car is ready to start — as on RS models.
Details
Some sources list this setting under “unit B7”, but its address is the same as unit 05 (CAN 732). Depending on the firmware the parameter lives in object 0574 or 1304 — a3c uses the one the unit knows and otherwise refuses before writing. Login 20103. If unit 05 is SFD-protected, a3c warns before writing. Roll back by writing the object backup from history.