evojkp,
I am not certain which of the LED type lights are legal or not because some people have sourced some slimine Proton items (I think thats what they were) that were fitted as foglights on the original car!
I was looking around to get a decent one for mine and probably the best would be a pair of Audi A8 foglights (the ones near the number plate) as they are fairly small. I think they could just about fit in the slits in valance on an E6, might need a bit of reshaping though. Anyway I never got around to it, I have a RING foglight stuck under the valance.
Legal requirements of positioning of a rear foglight:
Min height of 250mm from the ground.
Max of 1000mm.
The foglight should be no closer than 100mm from a rear brake light.
A single foglight can be placed centrally or towards the offside or two foglights can be placed symetrically.
Iwashere,
I assume the lighting position on the 7 must allow for the reverse light into fog light swap to be legal. The reverse light bodge is illegal on the 4-6 (fog light must not be within 100mm of the rear brake light). If it's legal then it certainly would be the prefered option.