If there are "stars" on the switch:
Starlight panel consists of approx. 64 LEDs in the roof. The intensity can be dimmed with a button in the roof console.
Operate button with ignition switched on:
"O" one brief press = on or off.
"Stars" repeated brief presses = dimming stepwise.
"Stars" long press = dimming continuously.
The selected intensity remains the next time the ignition is switched on.