Red light on drivers door

[DREW76]

I justv noticed the red light on the drivers door is remaining on even when the Caddy is unlocked and being driven.
I have checked the owners manual and cannot find anything about it.
Any idea what the problem could be?

[Transporter]

There is a fault in the circuit, you need to take it to the dealer. The central locking and immobilizer work OK, it's only the LED light circuit that is malfunctioning, not really serious.

[Lams]

mine goes on from time to time, same as our eos, we pay no attention to it, everything function as normal