break and ALS system lights come on when cold
 

My sister's family has a Toureg and were getting ready to make a 3 hour trip through the mountains on a cold day last week. When they first started, the warning lights came on. My brother-in-law looked the symptom up in the manual and it said "pull over immediately". After the car warmed up for about 15 minuites, the warning lights went out. This has happened twice.

Although the lights go out, it creates a litlte discomfort on my bro-in-law's and sister's mind that those warnings came on in the first place, especially over the West Virginia mountains with two kids in the car.

Have any of you experienced this? Do you have any clues? Is this a common problem? Could the cold cause this? Low fluid?

Any info is appreciated.