2006 W221 s class rear lamp warning

[mxs]

My 2006 s class 550 keeps warning that a stop & tail bulb has failed on the left hand rear lamp. They appear to be working fine, I have checked all connections etc... is this a known fault? if so how much to fix?

Thanks in advance

 

[Diesel Benz]

Rear stop & tail are LEDs. Are you sure all LEDs are fine (at stop light intensity as well as plain tail lamp)?

The car has been fine before? No poorly done facelift rear lights.

 

[mxs]

HI there, the car has been fine before, stop & tail intensity all fine. I have accepted the dash warning by pressing OK button on steering wheel, and fault message has not come back as yet. Fingers crossed!