Driving in Germany

Many people in the Netherlands take their cars across the border, which since the Schengen agreement has been totally free and the only thing that tells you that you have crossed the border are a few EU road-signs saying "Welkom in Duitsland". This could be about to change as the German parliament is debating a Swiss-style vignette system, whereby non-residents would have to pay a toll. It is not clear how they intend to collect and enforce this, however I expect it will be totally electronic and involve something like ANPR.