Tele Aid Disturbed! Mercedes me contact Call and the breakdown service Lamps glow red!

Hello, I have a rather urgent problem (unfortunately thought so) because the time before repeated driving runs out at the TÜV on 04.04. TÜV therefore rejected at the KÜß München?!? Since the change / update of the Mercedes me app on the mobile phone, about 1 year ago, lights light up at my Benz E 222d, A238, BJ. 6/17, W213, the lights on the button for Mercedes me contact call and breakdown service at the operating unit at the internal mirror, red instead of white. Before the app change I have the connection with d I had a car with an app on my mobile phone, then no more and the lights switched to red. According to the manual, this has to do with the connection to the Mercedes me app. That’s why I visited the MB dealers a week ago. The connection to the Mercedes me app, but unfortunately the lights are still red. The technician was at a loss. At the end I was recommended to replace the control unit, which I do not agree with. I hope to get help on this way! Out!