What changes
Door units 42 and 52 long coding, byte 1, bit 6 = 0. The illumination of the Bang & Olufsen speaker grilles in the front doors goes off.
Details
The 'speaker grille illumination installed' bit in the driver and passenger door units. One bit changes in each unit, the other bytes stay. On cars without B&O the bit is already 0 — a3c shows there is nothing to write. If a unit is SFD-protected, a3c warns before writing. To bring the lighting back, set the same bits to 1.