[Johnmed]

Originally Posted by tc4332

Hi John,
You need VCDS (VagCom) to do this.
Here is the information purloined from http://www.audiworld.com/forums/a8-s8-d3-platform-discussion-60/hooking-up-foglights-drl-parklights-2854529/

Fog as DRL Coding
Central Electronics - Control Module #9 (Cent. Elect.) under the tab Electronics 1

Begin by selectting Controller 09 (Cent. Elect.) and choosing function 7 (Recode)

Example: by entering the code 11111 on most 2004 models, we can now have the foglamps to illuminate without having the main beams on.

?xxxxx: Footwell lighting

0 - Footwell lighting with halogen lamps
1 - Footwell lighting with LED lamps

x?xxxx: Type of headlight

0 - Halogen headlight
1 - Bi-Xenon headlight

xx?xxx: Automatic Headlamps

0 - Without Automatic Headlamps
1 - Automatic Headlamps without Rain-sensor (Most 2004)
2 - Automatic Headlamps with Rain-sensor (Late 2004 and later)

xxx?xx: Daytime Running Lights

0 - Without DRL
1 - with DRL

xxxx?x: Type of Daytime Running Lights

0 - DRL not selectable over MMI
1 - DRL selectable over MMI

xxxxx?: Land selection

1 - Remainder of the world (RoW)
2 - Remainder of the world/north countries (Finland, Sweden, Norway) *Note: The exterior lights will be on continuously and only fog lamp changes can be made with the light switch.
3 - The USA
4 - Canada * Note Parking lamps and fog lamps will be active whenever the ignition is on or the headlamps are activated by the sensor or turning the headlamps on via light switch.
5 - Denmark
6 - Italy

To explain this, when you go into coding, on the 04 and probably05, the original coding is 0123113 which was how it was on mine. The 06-10's most likely have a different coding. Since all I have to do is to change the last digit according to the above chart, all I had to do is to change it from a 3 to 4. And Wala!!! I had foglights as DRL. They do run at a lower wattage which will have longer bulb life. I rather have it on this setting because, it looks better and sporty and I rather replace foglight bulbs than changing HID bulbs.


Hope this helps.

Thanks for that. I have VCDS and now have something to play about with!