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Originally Posted by ctelimad
it is not sound enhancement through the speaker but it actually opens and closes the valves but as mentioned above that only works in sports and sports plus mode ( engine setting ) and you wouldn't notice difference in comfort mode
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You're right I did some more digging and testing. It does open the valves and the note does change. BUT I did find out that there is also some sound enhancement through the speakers as well. Due to the cabin being so well insulated they pipe fake exhaust noise through the speakers as well. Not sure if I like that too much. Anyone know if there is a way to disable that option and still be able to engage the actual exhaust using the button?