Hi guys i am new to the a5 section but i need some help. I am an audi head so i know a little bit but here we go. Picked up my new a5 on thursday (audi a5 sline 2.7 tdi 2009) and been spot on since until i drove home and tried to use the MMI (i have every option, MMI high, bluetooth, cd changer etc.) it wouldnt work .... what i mean i reversed out of the gates at work and the screen just frooze on the parktroic screen even when i was on the motorway just still the same and no other buttons will work or nothing. So this stage im fuming and i just got home left it bout 30 min and gone back out and it is fine? has anyone ideas please? i know its under warranty but just curious thanks marnie