Cold Start with Valves Open: How to
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2020 GLC 63
I thought this was common knowledge!
- With foot off the brakes, push the start button twice, until the entire dash lights up and the steering wheel moves down.
- Push mode select up twice, to Sport+
- Place foot on the brakes and start.
- Vroom braaa braa braa pop pop
- Watch people at the convenience store/gas station/mall/parking lot, etc.... look to see WTF was that
- Drive away
BTW, the car stays in S+ with the valve open, I do it every day after I get my coffee in the morning.
- With foot off the brakes, push the start button twice, until the entire dash lights up and the steering wheel moves down.
- Push mode select up twice, to Sport+
- Place foot on the brakes and start.
- Vroom braaa braa braa pop pop
- Watch people at the convenience store/gas station/mall/parking lot, etc.... look to see WTF was that
- Drive away
BTW, the car stays in S+ with the valve open, I do it every day after I get my coffee in the morning.
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'17 C43 Coupe
did you buy it off of the German website? Or is there an American version I’m unaware of...
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C43 AMG Coupe
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'17 C43 Coupe
Here's another one that looks like it does essentially the same thing, albeit a little more expensive...
https://www.active-sound.eu/en/merce...ol?action_ms=1
https://www.active-sound.eu/en/merce...ol?action_ms=1
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'17 C43 Coupe
Do you notice a big difference when the car is idle? How much louder do you think it is overall just driving?
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C43 AMG Coupe
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From: North Jersey
c43 Amg coupe
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Joined: Nov 2017
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C43 AMG Coupe
From my own testing with the car at idle, warm and in sport +, there is no difference in sound between opening the valve via remote or opening the valve via the button in the car.
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From: North Jersey
c43 Amg coupe
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2009 C230
The benefit would be keeping the valves open 100% of the time. Stock setup they open and close dependent on certain variables, with this, they are open. Should be a much better at low RPMs than at high when the OEM setup already opens them up. I would expect just more consistent throatiness at all RPMs. Mine arrives next week so will update. Going in same time as a tune so might be a combo result.
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From: Massachusetts
2018 C43 AMG Brilliant Blue Metallic
The benefit would be keeping the valves open 100% of the time. Stock setup they open and close dependent on certain variables, with this, they are open. Should be a much better at low RPMs than at high when the OEM setup already opens them up. I would expect just more consistent throatiness at all RPMs. Mine arrives next week so will update. Going in same time as a tune so might be a combo result.
It was worth the money 100%
I feel like I opened up the full potential of the exhaust
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2009 C230
Thread Starter
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C43 AMG Coupe
Honestly (Though not recommended), if you are going to get work done that will void your warranty (if you have it) just unplug the cables controlling the valves under the exhaust. They will always stay open because no signal will be able to tell them to close. I imagine both options are not healthy per a warranty, but if you choose to unplug the line to the exhaust it can always be plugged back in from what I can tell.
Again Not recommended...
Again Not recommended...
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'17 C43 Coupe
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From: Massachusetts
2018 C43 AMG Brilliant Blue Metallic
Do you hear that???? my exhaust did NOT sound like that until I installed the controller.
To the person who stated you can unplug the wires, this is true but you can not close them or set them to default without the controller.
I still close the valves on the highway or when with wife and children are in the car because the exhaust is LOUD :-)
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'17 C43 Coupe
https://www.youtube.com/watch?v=dgBeuOQA2q8
Do you hear that???? my exhaust did NOT sound like that until I installed the controller.
To the person who stated you can unplug the wires, this is true but you can not close them or set them to default without the controller.
I still close the valves on the highway or when with wife and children are in the car because the exhaust is LOUD :-)
Do you hear that???? my exhaust did NOT sound like that until I installed the controller.
To the person who stated you can unplug the wires, this is true but you can not close them or set them to default without the controller.
I still close the valves on the highway or when with wife and children are in the car because the exhaust is LOUD :-)
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From: Toronto, ON
2021 Mercedes C63s AMG Coupe
https://www.youtube.com/watch?v=dgBeuOQA2q8
Do you hear that???? my exhaust did NOT sound like that until I installed the controller.
To the person who stated you can unplug the wires, this is true but you can not close them or set them to default without the controller.
I still close the valves on the highway or when with wife and children are in the car because the exhaust is LOUD :-)
Do you hear that???? my exhaust did NOT sound like that until I installed the controller.
To the person who stated you can unplug the wires, this is true but you can not close them or set them to default without the controller.
I still close the valves on the highway or when with wife and children are in the car because the exhaust is LOUD :-)
