Originally Posted by superswiss

Mr AMG always goes through the different modes in his videos and there doesn't seem to be any overrun pops and bangs in Comfort, especially with the exhaust closed, however EU cars now have the particulate filter. Does yours sound different from this? Starting at about 22:13 he demonstrates Comfort mode. It's always been my experience that AMGs quiet down in Comfort mode and with the exhaust closed. Now the upshift farts are a consequence of the ECU cutting the ignition in order to drop the revs fast and for the engine to keep up with the transmission. That's not artificial per se. These transmissions nowadays shift faster than the revs would drop naturally. I haven't driven the C43, but the C63 definitely doesn't pop and bang in anything other than Sport+ and Race. It seems AMG has actually toned it down a bit with the 2019 and some are complaining that it doesn't bang and pop enough anymore. I definitely understand where you are coming from, though. I'm not a particular fan of the artificial bangs and pops. I was actually pleased with how the 2019 C63S sounded when I test drove it the other day.

https://youtu.be/spExrpW_F1o?t=1333

Originally Posted by gcurnew

He doesn't really drive it with verve in Comfort mode though (and leaves it in Drive) so not possible to day whether it sound different than mine. Yes, the upshift farts are present in any mode at at more than (I'm guessing) 1/3 throttle openings.

Originally Posted by Malar

He still refuses to make an Video, so any further help is basically repeating the same Sentences in a different Order.

Originally Posted by gcurnew

Who "refuses" to make a video?

Originally Posted by munis

He meant you. I do not know about refusing but I do agree any further diagnosing before we can see a video is kind of moot.

Originally Posted by gcurnew

lol...I haven't even been in the car since Saturday. I will get a video done (probably on the weekend)...however the ask in my first post was for information on specifically how the crackles/farts are created (programmatically and mechanically), which is critical baseline information. I was 100% clear (for those that read it carefully) that I was looking to eliminate them. Whether a little or a lot of farting in Comfort mode (for accuracy, Moderate Engine mode, which is the default setting in Comfort) is actually of very minor interest to me. I want to use Sport and Sport+ modes with my PE wide open and don't want to hear (if practical) ANY popping and farting.

Originally Posted by munis

The crackling, bang, pops in sport and sports+ are all due to the map the ECU has for sport and sports+ mode and cannot be eliminated without a complete reprogram of the ECU ( Mercedes would not do it for you, so it has to be a tuner). It is a fuelling characteristic and is further enhanced by the position of the valves in the performance exhaust. If you get these pops in comfort, eco or slipery mode, then that is a problem with your car and needs further diagnosing on your part and the dealership.

Originally Posted by gcurnew

lol...I haven't even been in the car since Saturday. I will get a video done (probably on the weekend)...however the ask in my first post was for information on specifically how the crackles/farts are created (programmatically and mechanically), which is critical baseline information. I was 100% clear (for those that read it carefully) that I was looking to eliminate them. Whether a little or a lot of farting in Comfort mode (for accuracy, Moderate Engine mode, which is the default setting in Comfort) is actually of very minor interest to me. I want to use Sport and Sport+ modes with my PE wide open and don't want to hear (if practical) ANY popping and farting.

Originally Posted by gcurnew

I have a 2019 C43 coupe with PE. I bought the car knowing that it farted and popped, but expected that with the different drive modes and leaving PE mostly turned off (I purchased the option package that included PE to get the steering wheel) the annoying noises could be minimized. Turns out that's not the case. In every mode (excluding Slippery - which as a Canadian kid who grew up driving sports cars in the days before any form of traction control I can't imagine ever needing) the car farts and pops when driven even remotely aggressively.

I'm not looking to discuss or debate the merits of the popping and farting in this thread, as I know the majority of people with AMGs love it. I'm looking to 1) figure out what combination of engine mapping and mechanical components are responsible for the noises, and 2) figuring out a way to eliminate them. From my perspective (and I suspect at least a small subset of other C43 and other AMG owners) the car would be much more enjoyable if it didn't make the annoying brap on upshifts at anything more than fractional throttle openings, and didn't fart/pop/gurgle in any mode, at any time.

For background, I am aware at a high level how fuel over-run works, and that it is mostly - if not entirely - an engine mapping function. I have looked at the major tuner sites, and so far as I can see no-one offers a tune that eliminates the burbles/cracks/farts, but some purport to offer maps that will introduce it in vehicles that don't have factory maps that produce the noises. Frankly, I'm more than a little suspect of most tuners' products, and making cars quieter isn't their game so not sure how helpful they might be. That said, I would love to be pleasantly surprised by a reputable tuner stepping up and offering a solution.

I'd appreciate any pointers from owners or vendors/tuner with REAL knowledge of how the 2019 C43 farting is accomplished, as it would provide a baseline understanding for how to go about undoing it. A logical starting point if there was something wrong with the car would be the dealer, but in this situation I'm 99% confident no dealer would help me modify the car from the factory setup, nor would any official Mercedes Benz resource be of any help.

Please, don't hijack this thread with comments about why you like it, or arguments about why I should learn to love it. By whatever means necessary, I'll find a way to stop the farting as for me it seriously undermines the enjoyment of an otherwise fine performance vehicle.

Originally Posted by gcurnew

Who "refuses" to make a video?

Originally Posted by C43LosAngeles

Sorry, but I have to say that this is a ridiculous thread. Why the heck would you buy/lease this car if you didn’t want the sound? On top of that you got the AMG performance exhaust option. Were you given the car as a gift? Lol

Also, as others have mentioned, you will NOT get pops or crackles in comfort mode. At least on my 2017 model, I have never experienced this in comfort mode.
Until you show us video proof of what you’re claiming I’m calling BS.

Have a nice day.

Originally Posted by HTXgearhead

Have you tried running in sport plus with the exhaust shut?

Originally Posted by gcurnew

lol. Yes...this thread has become a waste of time. Thanks to those couple of folks that read and responded to my original request with actual information about the system.

Originally Posted by TModelle

So, in the end, was there any solution to getting rid of the upshift farts on 2019 models?

My car does it in Comfort mode and am looking to get rid of the sound. The overall exhaust sound is good, except the upshift sound bothers me.

It was observed in another thread that when the C43 is launched hard and close to perfectly, there are no upshift farts at all. This leads me to think that getting rid of the noise is possible, and perhaps even ideal for performance.

In some of the replies above, Eurocharged mentions they can tune it out. However, in my own correspondence with them, they say they cannot change the sound of the upshifts.

In the other thread where the OP wants to get his pops and crackles back, I was berated when I mentioned I wanted to get rid of exhaust noises and advised to keep to the topic of how to get back noise. So likewise, since this thread is about getting rid of the exhaust noises, in the same spirit I hope that this thread is given the same respect and constructive information is shared about how to get rid of noise rather than getting back noise.

Originally Posted by ShakyTom

Eurocharged can definitely get rid of them, they unintentionally got rid of mine when I asked for a burble tune.