Looking at your photo it's quite clear the fire has come from the drivers side dash - the fire officer that did a FULL investigation on our car also said the main source came from the drivers side dash. Sadly we had no photos of our car on fire, only the aftermath. Peter Morrell from Audi tried to insinuate to me that when the ignition is off NO electrical items are live!! Until I reminded him that, the alarm, lights, radio, central locking, are just a few of the many items that remain live at all times in a car. I even had an electrical diagram of an Audi A5 showing all the live components. I think he thought as I'm a woman I wouldn't know what he was talking about :)