Audio Question - Radio Cutting Off

This morning, on the way to work, I played the radio.
But when I got to work and pulled into our parking garage, I started playing CD1. It played fine. But when I got to my parking space, and started backing into the parking space, it cut off again. But the time I stopped backing, it had come back on and was playing normally again....
I wasn't blasting the volume either..
What's wrong?
Is something loose?
Has this happened to anybody else????
In addition, P-B-82.62/226c AUDIO50 (cassette player) head unit software update - DIY, purchase service disc (tool) W211589122200 and install

Too bad I don't speak Merecedeeeeeeese. Can you translate thatinot everyday ordinary English??? What do I need to check for and purschase???
The second item is a part from the Parts Department (a CD) that when inserted into the head unit will update the burned in software of the unit.
If this still makes no sense to you, print & cut out the instructions above without any names displaying & show it to your SA at the Service Department when you tell them the problems you are having.



