Hi everyone My son has a 2011 A4 Technic quattro with what we believe is the Audi MMI 3g navigation. All has been well for a couple of years but recently the navigation wont show up beyond the searching for satellites page. It doesn't seem to be reading the disc anymore, I have tried the other discs he has and it is the same result so we suspect the laser has become faulty on his unit. I was wondering if anyone could offer some advice on whether they had the same issue and of course if it really was the laser that needed replacement. We are fairly competent people and would like to try to replace the laser if we can source one. Can anyone offer some assistance ?