Another reason for disabling your DTRL is in order to comply with laws, if you've got fog lights and/or driving lights. I am not sure of the exact law, but there is something in Canada that states that you should not be burning your low-beams when fog lights and/or driving lights are in use. Disabling them while using your fog lamps also results in much better visibility for the driver, because the fog is not lit up like a wall right in front of you.
Here are the part numbers written on the switches themselves, in case you can't hunt one up at your local Auto Recycling Yard:
|VW Fox DTRL light switch||2BV 307 941 531.2 Made in Brazil|
|VW Fox non-DTRL switch||2BV 307 941 531.1 Made in Brazil|
This isn't anything threatenting to your Fox, but it is a minor problem. Again, this causes NO harm to anything in your car - I have been assured by the shop which installed my alarm. Here's the problem:
With the Fox I light switch in place, my alarm acts a bit differently. When turning if on or off, it used to flash all the lights once for armed, and twice for disarmed. Now it still does this, except only the lights on the left side flash, and only the parking lights, not the headlights anymore. I will be going in soon to have this looked at, so I'll post any updates on how to remedy the situation once I know.
If you are looking for one of these switches unsuccessfully, feel free to e-mail me, and I'll try to get one for you.