Mhk827

Hi everyone I have a friend that has a 2015 c300 whenever he puts the car in sport+ mode the exhaust makes a pop sound while gear change. So I have a 2016 one that doesn't do that when I put it in the sport + mode. So I am wondering if there is anyway to program my car like that too ? Thank you

tron786

Is that a good pop or a bad pop?

Mhk827

Hii. It's a good pop that makes it more sporty while the car is in sport +. I figured out alot of 2015 have that sound.but not 2016

vic viper

Does your car have sport package?

ManiacGT

Yes my UK C200 does this in sport+

It will hardly ever be in sport+ though.

Mhk827

Yes it does have the sport pack. But I think most of the c300 2016 don't have that sound. Wondering what I can do to make that sound lol.

Mhk827

Yea and I think it makes it feel alot more sporty cause I tried my friends car which makes that pop in sport +.

Mikey53

Get a CD with "popping" sounds?

Hellbent

It's the turbo letting off extra pressure.

Mhk827

oh so is that normal actually ??? I feels pretty cool lol and different feel.

ManiacGT

But it's the exhaust that pops not the waste gate.

Hellbent

Exhaust hmmm. I had a broken exhaust bracket that made a rattle when hard on throttle but never a pop.

topsider

my 15 does it but i had a 16 loaner last week that didn't do it

Mhk827

Yea I really hope my car does it too lol

Mhk827

Yea that is really weird.

DerekMB

2016's no longer have the noise you're referring to

Mhk827

Hey is it a bad thing that's why they don't have it anymore ?? Is there anyway to get that sound ?? Thank you

ENV²

You should listen to videos of the Jaguar F type R. Those are pops!

jamesbenz21

it's called rev to downshift and a lot of race cars do it... enjoy it!

topsider

do you know why?

Trancebolt

Mine is a 15 sport package early delivery. and does it only in sport plus on hard acceleration. not in sport full throttle from 1st, or even in manual in any gear but in sport plus it will make that quick popcorn noise while shifting/flooring it

i do like the feature and how it doesn't do it in other modes. alot of the cars that do that will always pop in some volume and will just have louder or quieter modes
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Hapa88

Pops like that are usually due to excess gas fumes from the engine hitting the hot exhaust pipes and spontaneously igniting (in the exhaust) which cause the "pop". The momentary rich state usually happens under Wide Open Throttle (WOT)/acceleration, a sudden deceleration, or during a gear shift. The reason is because most car manufacturers of turbo charged cars purposefully tune their cars to run slightly "rich" because it's safer for the motor.
Originally this happened a lot in older carbureted high performance cars running rich. With today's ECUs the amount of popping can be artificially increased by adjust the ECU tuning (example: Jaguar F-Type)

cjaredscott

2015 C300 without Sport Package here, has it. 2016 loaners, to my recollection, are far more difficult to get it on.

Paddington

i own a 2016 C200 sport package and i can hear the exhaust pop noise when im in SPORT + mode

Hapa88

This is what you guys are talking about, right? See around the 0:20-0:25 range when he lets off on the gas.

likerage posted this in his AWE Tuning track exhaust thread. It's a C450 AMG though.