Active sound module
The AVC (active valve control) is the only one that taps into the can-bus and requires you to actually strip and splice wires in the trunk so that it's operational via the ESP button.
The ASR and the other products mentioned (Chrome-tec, DB Autoveredelung) are plug and play directly to the two rear exhaust valve plugs, and the module is then MOUNTED in the trunk.
I don't like the idea of messing with can-bus and splicing wires, even though it's a more elegant solution since you operate it via the ESP button instead of a wireless keychain... but honestly, ease of installation (and the least obtrusive) is what's most important to me since I'll have the valves open 99.9% of the time I drive anyway. The switching functionality itself does not really matter much to me. So personally, I'd skip the AVC and go with whoever has the best deal on the ASR-style valve controller.
The AVC (active valve control) is the only one that taps into the can-bus and requires you to actually strip and splice wires in the trunk so that it's operational via the ESP button.
The ASR and the other products mentioned (Chrome-tec, DB Autoveredelung) are plug and play directly to the two rear exhaust valve plugs, and the module is then MOUNTED in the trunk.
I don't like the idea of messing with can-bus and splicing wires, even though it's a more elegant solution since you operate it via the ESP button instead of a wireless keychain... but honestly, ease of installation (and the least obtrusive) is what's most important to me since I'll have the valves open 99.9% of the time I drive anyway. The switching functionality itself does not really matter much to me. So personally, I'd skip the AVC and go with whoever has the best deal on the ASR-style valve controller.
Either way, I’m mounting/hardwiring this to use my exhaust button. I don’t want any remotes. But that’s just me!

I don't even think the wiring harness would be long enough to reach the engine bay from the exhaust valve motors at the back bumper.
The Best of Mercedes & AMG

I don't even think the wiring harness would be long enough to reach the engine bay from the exhaust valve motors at the back bumper.

I don't even think the wiring harness would be long enough to reach the engine bay from the exhaust valve motors at the back bumper.
I've been in the back of the trunk before and that module is mounted right next to where the exhaust valve plugs are wired to the ECU/can-bus (though for the install, you plug at the actual exhaust valve motors and run the wiring up through the trunk, there's an opening for wiring).
This is the exhaust valve plug as it sits stock:

And this is with the plug intercepted:

Then you just run the wiring up to the trunk and mount the box. Very straightforward install, would probably take a half hour or so.
Last edited by AlexZTuned; Apr 2, 2018 at 03:29 PM.
I've been in the back of the trunk before and that module is mounted right next to where the exhaust valve plugs are wired to the ECU/can-bus (though for the install, you plug at the actual exhaust valve motors and run the wiring up through the trunk, there's an opening for wiring).
This is the exhaust valve plug as it sits stock: <PICS>
Last edited by daxelsson; Apr 2, 2018 at 04:56 PM.




I've been in the back of the trunk before and that module is mounted right next to where the exhaust valve plugs are wired to the ECU/can-bus (though for the install, you plug at the actual exhaust valve motors and run the wiring up through the trunk, there's an opening for wiring).
This is the exhaust valve plug as it sits stock:

And this is with the plug intercepted:

Then you just run the wiring up to the trunk and mount the box. Very straightforward install, would probably take a half hour or so.




I have had this unit on my C63 S Edition 1 for 5 months now and love the sound you get in all modes full burble at low revs:naughty
Last edited by michael640D; Apr 6, 2018 at 03:28 AM.




Last edited by michael640D; Apr 6, 2018 at 10:13 AM.
I'm SUPER HAPPY with the end result after installing the Active Valve Control from Active-Sound.eu yesterday. Now I finally hear the potential in this car, it has a deep tone and is much louder during low RPMs. I can no longer cruise unnoticed on the streets apparently (if flaps are open). Another thing I need to mention is also how quiet and comfortable the car is when the flaps are 100% closed. Videos are coming, just need a tool that lets me blur my license plate. Any advise on software I should use?
Yes, I paid a higher price for my unit. Yes, I needed to "hardwire" and cut cables in my trunk - but it's worth it with the security features this module has. Even if my flaps are closed 100%, they will be forced open at high RPMs. The installation took about 20 mins.
I'm still waiting for my MB dealer to get back to me in order to get the latest software to get some loud crackles. I can't wait.
Please make sure the unit you are mounting has the same features, in order to not cause damage if you end up driving hard with the flaps closed.
EDIT: The perks (and reason it's more expensive than competitors) of the Active Sound version is that the exhaust button in my car still works, and it has the security feature mentioned above.
Last edited by daxelsson; Apr 7, 2018 at 06:20 AM.


