AMG Performance Exhaust System: On/Off
If you have a 63 model, then there is a switch that controls the valves. I have ridden in a few cars with this feature and it does a great job at muting the sharp noises that come from the exhaust (shifts, sharp acceleration). That said, don't forget the fact that AMG models are known for the great sound they produce!
If you have a 43 model, there is no button. The valves default to closed and only open up in "sport +" mode. The sound of the car changes dramatically when they are open. Sounds great!


