Did you know that you have to buy a vignette before driving on Austrian motorways?

I was visiting a pal in Bregenz, Austria, last week. He lives to the east of the town, and close to a motorway access, which would give me an easy route to the German Motorway system for my journey back...

What is the most comfortable car for motorway use?

Please, can you tell me what the most comfortable car would be for motorway use? My budget would be up to £45k

I've always understood that motorway X signs surrounded by a red ring are mandatory - but what if there's no red ring?

I've always understood that motorway X signs surrounded by a red ring are mandatory, so if you don't obey them, you deserve what you get. However, I have also seen these signs without the red ring around...