Re: Once you find your station, press and hold any number for a few secs..
The Audio-30 in our last ML430 did this, the dealer reset it and then it behaved as expected, ie hold down button for about 5 seconds, it beeps and station is stored.<br> <br> Try removing the fuse (including the backup power fuse), and putting it back - dont forget if it has a radio code you'll need it after the power is removed.