Audio, Navi, comfort functions spin. Buffer battery? Reset?

Moin! I just picked up my Volvo from a free workshop, where it stood for five and a half months. They were completely overwhelmed with the problem (motor, other topic). In the meantime, I had to give the starting aid once, I set the clock there on two visits. As far as clear, long service life and menrfach battery jammed off. Now the electronics shows the following symptoms: driving operation, light, turn signal etc. go flawlessly. Bluetooth connection with the iPhone works, however, the car radio breaks off the conversation abruptly, and after the conversation at the Handy is safely finished, the car radio switches again to conversation and shows the continuous conversation time, while the phone certainly does not carry out a conversation. The Navi does not work anymore at the push of a button at the steering wheel memory. After closing or opening the roof drive all windows back to the top position. Except the driver window, there remains the hand-breit gap. He has measured at the power supply of the AHK when searching for error, but otherwise the bus system (though) doesn’t. If a PC would make a cold start, then the operating system can make a new start?