Ambient lighting support

This has been reported by some users.
Try locking/unlocking the car and see if it would go away. If it does go away, likely just a glitch.
If it keeps popping up, you would need to get it checked out at your dealer.

Why away

This happened to me and went away after letting the car sit, turned off and locked for 10-15 minutes. I had it checked at dealer and they found no error codes. Hasn’t happened since.

At least for the EQS sedan here in Germany, the ambient light warning option (active ambient light) costs appr. 700€ in addition to the normal ambient light.