First push on then press the speed button .

Hi David, if you press the accelerator lever before pushing off (set to 3 km/h), this can lead to error messages or non-response. If you hold your brake lever on when braking in front of a traffic light at standstill and push the throttle lever completely forwards, then you can release the brake lever and press the throttle lever at the same time, then it will start in boost mode from 0 km/h direct at quite a speed. Greetings Gysi

Try to set it up in the app - you can switch among the speed level

I read on the app, I will probably accelerate before the 3-5km/h boost
😅 I'll try again
It only happens to me occasionally at traffic lights or stop✌🏽