And see this link to actually buy online in advance - http://www.travel-swiss.co.uk/passes-mo ... nette.htmlAutobahn tolls: In Switzerland you pay an annual motorway tax, even if you're only using the motorways for an hour or two. A vehicle sticker, or vignette, must be displayed on the windscreen by all vehicles. Of course, if you don't need to use a motorway you don't need to pay, although it's difficult to cross the country without doing so.
If you don't display a vignette you'll be liable to a fine of CHF100 plus the cost of the vignette. You can buy the stickers in the UK from the Swiss Centre. You can also buy them in Switzerland from customs offices at the frontier or service stations, garages and post offices.
Looks to be around £27 at current exchange rates. Expensive unless you will be using Swiss m-ways a fair bit. My understanding is that you could cross the country without one, providing you don't touch the m-ways at all. Very possible although for some long-distance sections it would be a bit of a drag (see lack of overtaking tolerance, above!).