but its not a new thing to have winter tyres here Runforfun - every person i know here has been changing them march or april then october/november for as long as they've had a car! it would be really frowned upon to not have winter tyres!!
Its just that now it is a legal requirement during winter - previously it would only have been the insurance company who would have penalised you if you'd had an accident in the snow with summer tyres on.
It doesnt seem to stop the speed freaks tho on days like today when there's no snow - they still whizz past you probably going over 100mph!!! so fingers crossed for you that the roads are clear for you to get a bit faster than in the UK!
I don't know if it's the case in Germany too, but in Austria an alternative option is to have Allwetterreifen or Ganzjahresreifen (all-weather tyres or all-year tyres), which means that you don't have to change to winter tyres in November. I'm guessing they're different from the normal tyres you have in the UK, though.
First fine is 40 euros. However, if the weather is dodgy and they catch you in summer tyres you'll spend 6 hours in a police station sorting it out and paying a far greater fine - and heaven help you if you have an accident or just need to pull over because you can't get further.
Driving a BMW at speed on snow is just plain daft sorry to say. Assuming it's rear wheel drive of course.