Between the sunroof curtain buttons is a false button with a picture of the curtain - to clarify what those open/close buttons do. The glass open/close buttons have a working centre button due to vent mode, so it is obviously what those buttons are for.
However, in the dark the false curtain button does not illuminate. Is this an oversight (e.g. it has a graphic to indicate purpose but nobody thought to make it visible in the dark), or do I need to have it rectified next service?