Vehicle insurance is naturally compulsory in Germany. Compared to some countries such as the UK, coverage is taken out on a personal basis but in fact covers the vehicle rather than just the driver or drivers. This can be unusual for many expats.
Policies vary widely in conditions and prices. Age of driver, safety history, estimated mileage that will be driven over the next few months, emissions, power and so on. Then there is the region in which the car or motorcycle is registered and the corresponding accident and theft rates.