Finally got my rear fogs working last night... And FYI, there is NO coding needed.

On my 2008 4.8i, there was no wire installed from the connector (Pin 9) on the back of the light switch to the connector (pin 14) on the left side of Floor Well module behind the hood acess handle. It shows the wire on all of the wiring diagrams that I have seen, but it was not there.

Buy the correct switch, install the wire, and you too will have Rear Fogs on your E70.

Took me about 45 minutes to figure out what to do and to get it done.

I bought my switch here, be sure to order the correct one, for your vehicle options:
EuroActive.com - Buy Genuine BMW & Land Rover Parts and Accessories Online

Enjoy,
95wildtt

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2008 4.8i X5 (2/25/08) 105k:
Titanium Silver/Black; All -HUD; Aero Kit; 22" VS-130 w/Pirellis;
///M Shifter & Fr Brakes; Gauge Rings; Console Pads; Custom Wheel & Mats; Roof Rails
Carbon Fiber: Int Trim, Nav Surround, Grill, Cluster Trim, Shifter & Eyelids
1.2" H&R; LUX AEs; LCI Tails; Rear Fogs; NBT EVO; ESS Tune; Meisterchaft GTC Exhaust