Hi please can you help me. I've got an audi A5 coupe 2015. I've recently changed my factory sub woofer,,, and put a aftermarket subwoofer and amplifier into the boot. Since putting the battery cables back onto the battery. There was a spark. From connecting the battery wires. And now the time isnt available even in the settings its not showing. To be able to set the time. Nor sat navigation isn't locating my location.