Hi all. I have a 2008 A6 saloon WITHOUT roof rails. A friend has offered to lend me his large roof box for a holiday I am taking next year (long driving trip through France) but have a question. Without roof rails, how do I fix the roof box to my car? Do I need to find some second hand roof rails from Audi or a breakers etc. so hat I can fit roof bars then the box? Or are there roof bars to fit the box to that DONT require roof rails???