I found out last weekend, after the annoying hassle of turning my car on & off to keep warm while at the drive in, how to turn off my Jetta's daytime running lights while keeping the car is on & in park. Simply pull the handle up on the parking brake & the lights should switch off automatically.
Somewhere buried in the Owner's Manual it tells you how to do that, but there is probably like 5 books in that thing. Plus I'm thinking a lot of people (like me) are searching Google for it before going to any manual. Let me know if this helped.