Quote:
you can switch sound for the inside of the car but as far as I know, this is not officially approved by Porsche and has to be retrofitted by your dealer



I heard the reason the put the on/off switch is because of Swiss ordinance/regulation other than Swiss no other country requires on/off button.

However there is a quick fix that, you can have it on all the time. When rear engine lid is opened there is a small brown connector on the right side of the engine (the only brown connector). The connector can be easily pulled out and be disconnected, now your Exahust is on all the time .