Professionally using laptop in Switzerland and Germany?

Work in Switzerland as a weekend commuter. Would like to do 1 time a week home office in Germany. Do I have to run and reintroduce my labtop every time in Switzerland?

If you take that, yes. But what is so bad about it, you do not have to register in and out of customs

Thank you for your answer. Yes, I would always take him with me. Does that mean I just have to drive through customs and do not have to do anything?

It's a used device, there should really be nothing on it.