Hello, As I said earlier, there are solutions (such as replacing the control box), but the warranty will lapse. However, the legal speed of 20 km/h (Swiss Germany) is not the main problem. The "D" version does not allow you to set functions such as tempomat (cruise control), start without pushing, and many other comfort settings. These functions are not released. So if you have a serial number starting with 01GZ... the "Z" is the restricted version for Germany and Switzerland.