That is a good shout (harveyP6) as the car did previously have a tow bar fitted. Now removed.That is not factory fitment. It could be a towbar indicator warning light. Or not.....
Thank you Rovering member for the informationMy first P6 (2000TC S1 & a half) had a green low brake pad warning light fitted there. Retro-fitted l assume & it worked too.
Not had a chance to track back the wires, but hopefully will do it this weekend.I had a similar light in the same position from a car alarm system now thankfully removed.
Somewhat obvious question, have you followed the wires from the rear of the bulb?