Hello I bought myself in January 24 a VW Up Beats Built 2017,60tkm with 75 hp. Actually a very nice car. But since a few days a start is not possible. Error message in the display, ESC error and tire pressure control currently not available. Let the car read from a friend,with the result the engine control unit is not reachable. fuses all checked, all i.o.The car is always overnight in the garage, so a marten damage is excluded, are also battery is also okay. A friendly car mechanic asked for advice,with the tip to control the relays under the steering wheel. I did that,built out and checked for circuit and passage. Also all in order. Again a advice obtained from another car mechanic, who then found a circuit diagram at Bosch. He then said I should check the relay with the number 645 in the relay carrier on the right in the upper row if e This relay is responsible for the power supply for the mstg. So Relai out and tested the whole time with the multimeter, and she because the voltage that should make the relay to attract is only 1.3 V. It would have to be at least 12 V so that the relay is switched on. So put a bridge in and the car starts again,without any errors.A round driving on the yard is noticed the bending light not funktio and of course start stop also me, because of the brittle Relai. Again error memory read out, no errors present. Now I am of course again at a point where I don’t know any further. Mass connect all tested. Why do not come there 12 V to,so that the Relai is switched on. Has the ignition switch done something with it, or even the on-board power control unit, because the fog lights do not work. I am eager for reactions and answers.