Too bad the 6 buttons aren't available for whatever mode you're in. Like 6 destinations if you choose navigation, 6 Sirius stations, 6 FM stations, ...
On my E46 there were 3 sets of 6 Sirius presets.
Here's an interesting thing I found. I programmed Sirius channel 22 from the rock category. While listening to that channel, if I hit the idrive knob to go back to the station list it would only list the rock stations, 14 through 23 or something. If I wanted to go to 7 or 8 I'd have to navigate up to the category list and choose all stations or pop. So, I reprogrammed Channel 22 to the same button but from the all station list. Now when I hit the go back arrow, I can scroll to any Sirius station. Much easier. I still haven't filled up my 6 buttons.
435 ///M Sport 'vert