Hello, I have the CAN-bus “drive” in the Audi Q3 in the sky above the reading lights, this runs between the control unit for the main-beam assistant (J844) and the diagnostic interface for the data bus (J533). I would like to know if I come to the said bus (“drive” to all the essential information that allows a live recording of the driving mode (speed, speed, oil temperature, charging pressure, etc.). Background: I would like to install a “black box” , which records the mentioned data in order to prove, if necessary, an improper handling of the engine (full gas with cold engine, etc.). However, the boxes/plugs available for this purpose are usually connected to the CAN bus “Diagnose” (i.e. the OBD2 interface), but there such a “Black Box” is anything but hidden and is immediately removed in the workshop, since the interface is needed for its own purposes. In the roof such a box would not be noticeable and could record the data independently of the use of the OBD2 interface. In this case: CAN bus lines can be turned off with short (!) tap lines (of course still twisted) (T-shaped), or?A legal instruction about “black boxes” is not required. Let’s assume that everyone is pointed out when handing over keys (if necessary acknowledged by signature) and several corresponding hint stickers exist.