2014 s550 exhaust flaps?
12-12-2023, 03:03 AM
#1
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2014 s550 exhaust flaps?
Does anyone know how these are meant to operate? (The flaps in each rear muffler)
I thought maybe you push sport or both sport buttons and it opens but no iv only ever seen it closed. Obviously I cant see the flap while WOT without a camera back there....?
So can anyone explain the correct operation of this? Its clearly vacuum operated.
I thought maybe you push sport or both sport buttons and it opens but no iv only ever seen it closed. Obviously I cant see the flap while WOT without a camera back there....?
So can anyone explain the correct operation of this? Its clearly vacuum operated.
12-12-2023, 03:53 AM
#2
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Found this thread someone says the flap doesnt open until up in the rpm range in either mode. But in sport mode it opens earlier....
https://mbworld.org/forums/s-class-w...ml#post6205748
I'll have to figure out which module controls it and see if I can actuate them with my scanner. Just to check they actually work which I suspect they do but you never know.
https://mbworld.org/forums/s-class-w...ml#post6205748
I'll have to figure out which module controls it and see if I can actuate them with my scanner. Just to check they actually work which I suspect they do but you never know.
12-12-2023, 11:16 AM
#3
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2015 S550 4Matic, 2014 ML550
Found this thread someone says the flap doesnt open until up in the rpm range in either mode. But in sport mode it opens earlier....
https://mbworld.org/forums/s-class-w...ml#post6205748
I'll have to figure out which module controls it and see if I can actuate them with my scanner. Just to check they actually work which I suspect they do but you never know.
https://mbworld.org/forums/s-class-w...ml#post6205748
I'll have to figure out which module controls it and see if I can actuate them with my scanner. Just to check they actually work which I suspect they do but you never know.
Put these on my 2015 two years ago. Love them.
They are having a 10% off Holiday Sale.
12-12-2023, 03:33 PM
#4
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RENNtech EVM | Exhaust Valve Module
Put these on my 2015 two years ago. Love them.
They are having a 10% off Holiday Sale.
Put these on my 2015 two years ago. Love them.
They are having a 10% off Holiday Sale.
it looks like that thing plugs directly into a module or something can you tell me where it is?
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12-13-2023, 09:05 PM
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2015 S550 4Matic, 2014 ML550
I do know that the 2014-2017 W222s have vacuum actuated exhaust valving (with electronic valving found in the face lift models) controlled by a solenoid valve. The exhaust flap position is normally adjusted according to speed and engine mode. Done via commands relayed from the ECU to the solenoid valve which then modulates how much vacuum is allowed to reach the flaps. The solenoid is an electro-mechanical device and so controllable by electronic signals from the ECU or from Renntech's module. I don't know if all this really answers your question or not. Hope so.
12-14-2023, 02:43 AM
#10
MBWorld Fanatic!
Definitively? I truly don't know exactly how it works.
I do know that the 2014-2017 W222s have vacuum actuated exhaust valving (with electronic valving found in the face lift models) controlled by a solenoid valve. The exhaust flap position is normally adjusted according to speed and engine mode. Done via commands relayed from the ECU to the solenoid valve which then modulates how much vacuum is allowed to reach the flaps. The solenoid is an electro-mechanical device and so controllable by electronic signals from the ECU or from Renntech's module. I don't know if all this really answers your question or not. Hope so.
I do know that the 2014-2017 W222s have vacuum actuated exhaust valving (with electronic valving found in the face lift models) controlled by a solenoid valve. The exhaust flap position is normally adjusted according to speed and engine mode. Done via commands relayed from the ECU to the solenoid valve which then modulates how much vacuum is allowed to reach the flaps. The solenoid is an electro-mechanical device and so controllable by electronic signals from the ECU or from Renntech's module. I don't know if all this really answers your question or not. Hope so.
12-16-2023, 04:08 PM
#11
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2015 S550 4Matic, 2014 ML550
Nice Ride, the good news is that it will work on your car too!
