Yes, you'll need these. They can be purchased at petrol stations or at border posts or the Automobile associations in the various countries. Austria definitely has short term stickers, the others I think do, too. In Austria they're called "Vignette"
Weekly (valid for 10 days ) and Monthly ( valid for two consecutive months ) motorway discs compulsory. Some previously levied roads & tunnel tolls still apply.
when you cross the border, or in the case of Germany-Austria, just before, you can pick up a vignette. The Austrian ones entitles you to drive on motorways etc and it's not worthwhile not getting one (unless you have a crash or break the law nobody will check). You can just pick them up when you're crossing the border, in Austria the last time I got one was €12 or something around that! Remember to punch the day you buy it!
BOND-007 : I see from the aerlingus sale post that you're off to Prague! Good for you ; what are your plans re driving in Hungary / Slovakia ? Austria?.............if you don't mind me asking.
BOND-007 : I see from the aerlingus sale post that you're off to Prague! Good for you ; what are your plans re driving in Hungary / Slovakia ? Austria?.............if you don't mind me asking.