The Sat Nav works when the radio or CD player is on. The system simply mutes the music sound while announcing turn-by-turn directions at more or less the same volume.

And like Chris says, the fix-a-flat canister and compressor store snugly in nifty recesses under the trunk mat. Be aware that most folks would choose not to use the fix-a-flat, as it can really gum up inside the tire, causing the tire to be wildly out of balance and give fits to the poor tech trying to do repairs. As an alternative, keep a plug kit in the trunk, along with needle nose pliers, etc. to possibly fix the offending puncture in lieu of using the fix-a-flat goo.

More importantly, keep your AAA up to date.