Support. Help plz, just bought an 06 plate a6, 2.7tdi quatro, the guy I bought it from said he renewed the battery but did not code it in with a diag machine, the mmi now doesn't work if u switch it on it comes up with the audi logo for about 30 secs then flashes a message about a component not being supp Two simple things to check depending on how long you've owned it, try holding down the power/volume **** a little longer and second the button over the glove compartment release turns off the display, it may have gotten pressed by accident. XWRII.