O.K. if memory is rare there should not be a waste of resources and for switching between MP3/AM/AUX/... predefined values are also useable.

But for the traffic alert part it would be very helpful to have a adjustable volume level, not a prestored adjustment. With this feature you could e.g. lower volume when driving with guests but still hear traffic alerts. A prestored absolut value could also be feasible but with one disadvantage: when driving in town volume level for TA will be equal as when driving on an Autobahn.

Juergen