Phone not working

Hello,
The head unit in my Jetta has suddenly stopped connecting to my iPhone, it just gives a constant connection fails error. In addition whenever I start my car the radio is basically reset, it doesn't remember any saved stations and it starts at the car play screen regardless of where it was when I turned the car off. I have to assume the two issues are related and my theory is that it is probably a fuse, but i'm not sure which fuse it might be. the manual doesn't have a fuse guide. I'm hoping someone can point me in the right direction.

Thanks