Hi I have a 63 plate Superb with a built in Sat Nav and multimedia set up. Had the car for a month and have noticed that the Sat Nav keeps freezing up and then keep restarting the multi media system on a 15 / 20 mins cycle until the car is switched off. Then it all works (including the Sat Nav) until the Sat Nav freezes again.
I'm wondering if there is a up load / download to rectify the issue, I've gone through the set up and reset to factory settings, but it still does the same.
Anyone had a similar issue or can offer any advice?

Cheers