Hello, I have read a few articles about the use of digital tachographs in recent times and I have already been answered a few questions, but I do not find an exhaustive solution to some problems. District administration, BAG, police and driving instructors almost surpass in the number of different answers. I would also be very grateful if you could give us a hint on the paragraph or something. the following situation: I intend to buy a minibus (under 8 seats) or a van (closed box ) with 3.1 T GG. The car will have a trailer coupling to pull a 2 T GG trailer 4-5 times a year. The journeys will go beyond the 50 KM radius and are clearly of a commercial nature. However, I do not operate a transport industry. If the total car weighs more than 3.5 t I clearly need Digi. Tachograph, driver card, and the corresponding But what about commercial (works) journeys under 3.5 T? 1) Does the tachograph have to be used just because it is built into the car? 2) Do I have to use the tachograph when I am travelling privately with the car? 3) How do I have to prove private journeys? 4) Does another person who uses the car exclusively privately also have to use a driver card? 4) Do I need to be a self-driving entrepreneur. upt a driver card? I thank you all out there for your efforts.