Use the RTL 510 and UT 800 in Germany

Is it possible to use the RTL 510 and the UT 800 in a way that is compliant with Germany's StVZO? I know that both lights are not allowed, but at least for the rear light there exists the RTL 511 which should be mostly the same device.

So is it possible to lower the intensity and the blinking as long as I'm in Germany? I'm using an Edge 530, but I didn't find an option to switch of the blinking of the rear light when the radar detects a vehicle. Any ideas? Maybe a firmware modification?