Exhaust valves at rear muffler.
Thread Starter
Member
Joined: Mar 2010
Posts: 106
Likes: 20
2021 GLE63S
Exhaust valves at rear muffler.
I believe starting in 2021, Mercedes made it such that the valves do not fully open unless under full throttle.
This likely was due to the new EU sound regulations.
They default to wide open when the car is off. However, simply disconnecting the motors will cause a fault code and reduced power.
Has anyone tried to disable the rear muffler exhaust valves by removing the actuator motors (but keeping them plugged in order to avoid a code) or some other method like an adapter/spacer or an aftermarket plug and play module?
This likely was due to the new EU sound regulations.
They default to wide open when the car is off. However, simply disconnecting the motors will cause a fault code and reduced power.
Has anyone tried to disable the rear muffler exhaust valves by removing the actuator motors (but keeping them plugged in order to avoid a code) or some other method like an adapter/spacer or an aftermarket plug and play module?
Joined: Apr 2006
Posts: 560
Likes: 65
From: LHC, Arizona
2024 GLE 63 S Coupe 2020 E 63 S
Renntech makes a module to keep them open all the time.
https://www.renntechmercedes.com/ind...490-213-detail
https://www.renntechmercedes.com/ind...490-213-detail
Thread Starter
Member
Joined: Mar 2010
Posts: 106
Likes: 20
2021 GLE63S
Thanks for that.
Because I'm not sure how much better the sound would be, before spending
that amount of money, I was tempted to remove the actuators, zip tie the valves 100% open and
leave the actuators plugged in to see how it sounds.
I hesitate now though, thinking I might buy a problem reinstalling them in case they need to be re-formatted, etc....
Any thoughts?
Because I'm not sure how much better the sound would be, before spending
that amount of money, I was tempted to remove the actuators, zip tie the valves 100% open and
leave the actuators plugged in to see how it sounds.
I hesitate now though, thinking I might buy a problem reinstalling them in case they need to be re-formatted, etc....
Any thoughts?
