http://www.e90post.com/forums/showthread.php?t=51749
FOLLOW DIRECTIONS FROM LINK ABOVE TO ACCESS AND OPEN FOG SWITCH. THEN INTEGRATE THIS IDEA
As we all know, we need a little white piece inorder to correctly modify and make our rear fog lights work. Here is a little DIY that'll cost you possibly $0.00. The piece of mind on how well this fits is priceless (well, unless you get the OEM Euro switch then its like.. $55 bucks lol)
ENJOY!
I used LEGOS! Stole them from my little brother
1x flat piece with 3 dimples,
3x SINGLE dimple pieces, looks like little squares
*** I USED THE GREY PIECE WHICH IS EQUIVALENT TO 1 2/3 OF THOSE YELLOW SQURE THINGYS
The LEGO 3 dimple piece is the EXACT width as the BMW soft buttons. I begin to think BMW used legos to mock up their cars lol
WORKS GREAT! My pieces even had a hole in the middle incase i ever decide to drill a small hole in the button for the light to shine through. BTW: Bmw is so nice to even have the factory led already soldered onto the the circuit board. All you need is a small hole for the light to shine through
Great thing about BMW is that they include the rear fog bulbs! whoo hoo, saves us E90/E92 owners $5 bucks