When replacing a bulb in the tail assembly of my 300SDL, i noticed
the red part of the cover on the inside (between the back up light and
license plate) does not have any wiring running to it. There is the
same shaped hole in the cover, which i thought might be a holder for a
spare bulb? Why is the red part there if it does not light?
'86 300SDL 284k miles
'80 450SL 218k miles