Originally Posted by Fantasmos

So, Porsche is selling an XLF coded feature called Porsche Sport Exhaust. It includes valved end exhaust and a button in the central console that can enable or disable the "loud" mode. However, there are cars like mine that have the valved sport exhaust but lack the button in the console. I think those are cars with Sport Chrono which didn't pay for the PSE. Typical Porsche. I called them and some clueless dude told me there's much more to the PSE than the valves which was complete and utter BS.

On all threads people suggest something really stupid - to disconnect the vaccuum from the valves or the solenoid and keep them open all the times. That's really something I would do to a Golf III but really, Porsche? Plus, in normal cruize mode I love how quiet the car is. Sport +, valves open (automatically) and you get all the pops and bangs.

To begin with, let me share some info about the button itself. It's part of the Clima unit actually and all units have ALL the buttons available. They are activated and deactivated with coding and nothing more. So, even if you have one button in the right console, you can enable this, pop-up the lower plastic and see for yourself that the button is working and even leds are flashing. Here are some photos about that:



The button itself is from 2 pieces, going through the plastic, so you can open the top one witout doing anything but if you want to ADD a new button you need to disassemble the right column of buttons.



Ideally, you will find a 2nd hand unit that has exactly your number of extras. Depending on what you can source / find you need the lower plastic piece because they are "filling in" different number of slots - 1,2,3 etc. You can't just pop one place holder and replace it with a button. Again - typical Porsche.

I think there are videos about opening that piece on YT, it's pretty simple - pop up the geashift, the plastic around it, there are 2 screws for the carbon/metal/piano trim around it, pop that out and underneath you can access the row of buttons and remove it.

Next, it's important to order the buttons properly. Just google Panamera central console or smth like that and find a car that has your configuration. In my case on the right, I had Start Stop and Lane assist. Once you add PSE, the order will become Start Stop - PSE - Lane Assist. It's the same button, they just need to have the proper picture on it. Since I am lazy and don't like the lane assist anyway, I just replaced the top part of the button with the proper one I got from some second hand unit.



There's a very slight difference between preface and facelift buttons. On facelift ones you need to trim a tiny plastic piece from the inside of the button. 10 seconds job.

Last thing you need is a working PIWIS and some coding.

In (E)ngineering mode, go to Diagnostics -> F7 to open the additional menu. There you will find a Maintenance of vehicle data button.



Select and proceed. Here you will find your car specifications. You need to add an X and an M feature.





By the way, from here you can code your Start/Stop button to remember its last position. Turn off the default on option and enable the last mode one.



Now, press next and make sure you SAVE the changes with F8 or the button.



Now, your car is configured with that option Back go overview, select DME and BKE units (engine and clima control) and go to Coding and Programming



Select Manual Coding and then enable the same M and X numbers that you have added to the car. Next, next and you're done You car will remember the last value of Start/Stop button and the second button from the top will open and close your valves. They automatically open in start stop plus the engine knows it has PSE and does not suffer from backpressure loss if you drive with the valves open. Mine does pops and bangs and sounds awesome, zero drone, quiet as a mouse on comfort mode.

Originally Posted by Fantasmos

That’s the thing. Many cars HAVE it. Porsche just want to charge for the button and don’t activate it.