Unfortunately I have to deal with it again: after the change of the computer my nav goes again, I have searched for another annoyance at the Infotainment 300 and found: the miserable sound !!! I already wonder if something (more precisely: the subwoofer) does not work…? At low volume everything sounds quite good, bassy slightly narrow, but ok. But as soon as I make a little louder (with open roof in road traffic), it becomes a disaster. I have to have the bass almost completely h If I put the fader back (where the subwoofer should sit, or ? Is it controlled by the fader ?) only tinned squawk comes. If I put the fader forward, there are a few basses, but – as described – at volume just above room volume, immediately start to destroy the boxes. Is this also so pathetic with you ? Or is something wrong with my ? greetings, Thomas