Andrewembassy

I bought the car with this defect. The volume **** of my "Concert" does not regulate the volume properly: when rotating in both directions it alternates loud volume with no volume at all. At the same time, it functions perfectly in other modes - bass, tremble, balance, etc. - step-by-step. Two local electronic gurus (I am in Armenia - no Audu servicing or scans here)after disassembling the radio for couple of times think it could be processor problem. The strange thing is, when the car gets very hot standing under direct sun, the volume control begins operating normally. But 10-20 minutes after I start the car and A/C and the interior cools down, the volume goes into stubborn mulfanction mode again. Please HELP!!!

A6 Quattro UK

code otherwise radio will display SAFE