Literally, that means:
Day and night of all the inland to the zero tariff attainable.
Publishing houses are also at the [north] motorways for the BMW on-call service.
Please call with registration papers ready.
It will take about 15 seconds.
So basically, call BMW when you are in Germany and you will get a "publishing house", or road side assistant with your registraion papers ready. It will be about 15 seconds.