Hi Everyone

I am having a bit of an issue with my 2012 VW CC. The rear fog light seems to come on when the main lights come on and stays on with the lights, even thought the fog lights are switched off. This is for a 2012 UK CC.
I have VCDS and have ran an autoscan and it does not come up with any fault codes so I am a bit stuck.

I have bi-xenon headlights factory installed.

Does anyone have any ideas?

If anyone needs any more info, please let me know.