Dear friends, I’m still fighting with my not always reliably running COMAND system…. (When it runs once, it runs reliably, but it doesn’t start again after switching off once)…. The Headunit and the AGW have been tested and found to be fine! Now I want to monitor the power supply during the reinstallation on the connector of the Headunit and came up with the following question(s): In addition to the LWL there are still plus, minus and the so-called Wakeup line available: 1) For what is the Wakeup line?!? or 2) which connections do I have to monitor to see if the “non-starting of the Headunit” could be due to the power supply. 3) Where is the SAM with the R230 Vormopf and what function does it have? For answers I say thank you in advance!