The penalties for these violations vary, usually leading to license suspension or the necessity to pass a MPU test in Germany to reinstate the license. Expats that have not long ago arrived in Germany can carry on to implement their foreign driving licence for something nearly 10 years, according to https://driving-permit-for-sale-g59124.tinyblogging.com/the-smart-trick-of-commercial-vehicle-license-germany-that-nobody-is-discussing-75973370