The internet radio on my Command Unit stopped working. I contacted Mbrace technical help and they were unable to fix the problem remotely. I took the car to the dealer and they tried to correct the software and contacted Germany for assistance. It was taking so long I took the car back, waiting for further notice from the dealer. About a week later the dealer advised they were going to replace the Command module in my car. It appears this has happened to other vehicles not just mine. Today, when they were supposed to do the work, Germany advised all the apps were down so the dealer was unable to test to see if the replacement worked. Hopefully I will know something tomorrow.
Just to advise that this is another potential problem.
2017 GLC43 AMG.