I have an F10 with the widened instrument panel display and when starting the car there is an icon with "rear" and I suppose three passengers - this goes out after a few seconds. does anyone know what it means - the instruction manual doesn't seem to mention it.

 

it shows in red when theres no passangers in the back, and the person icons are green when there are people in the seats, I assume its to indicate if seatbelts are on. for me i have 2 kids car seats so the outside ones are alsways green.