Here's what I did: (non S-line, Non-S3, regular US-spec A3...)
Drilled a closely-spaced diagonal set of 5mm holes:
Same thing, but backlit:
Made some 0.1" pitch circuit boards to stuff behind there:
Here's one inserted through the carefully-drilled holes into the fog grille, with the others close by:
Here's two loaded in, one either side of the center 'rib':
rear view of the LED clusters wired through current-limiting resistors:
Test-lit using a DC bench supply:
Two of them test-lit:
Lights out... it's pretty damn bright!!!:
Here's the two foglights side-by-side, unlit:
...And I experimented with some film-set lighting gel (
www.leefilters.com) to correct the light from "blue-white" to PURE white (seen to the left in this photo:
..then of course, I got a bit giddy, and added two half-rows (one above, one below) to each fog grille, with super-bright
AMBER LEDs, to use as turn-signal repeaters:
I've still got to install them, but they shoudl look pretty 'stealth'. -They're actually mainly 'hidden' by the 'ribs' above them, but they should light up pretty well once they're on there.
Keith