Clock Resetting

[manca]

Hello All

Can anyone tell me why my clock keeps resetting itself. It must be 80% of the time. It only happens when I get in the car. It mainly goes to 0:00 but just for the hell of it will sometimes pick something completely random. Date is often wrong as well, and usually sticks at the last date I used the car. Time will go wrong without affecting the date but date never goes wrong on its own. I can't set it to Radio or whatever the setting is, it just goes to 0:00 when I do that. Running latest firmware, but don't have any of these cable things to check anything with.

Thank you (and Happy New Year).

Adam