Opinions on M276 engine exhaust mods? I've looked into it a little bit, nothing has really caught my eye.

How much you wanna spend...

https://gthaus.com/product/mercedes-...6-models-2010/

I've seen the meisterschaft exhaust before, and it sounds amazing. I'm just not sure if Im willing to fork over 2 grand LOL. More looking for like resonator/muffler combos/deletes.

what is the goal of this mod?

you have a car that has been engineered from the ground up to be as quiet as practical.

no exhaust modifications will have a MEASURABLE impact on performance. Mercedes went to great extremes to get 300HP out of the M276 3.5L NA engine, if something as simple as making the exhaust pipes bigger would have added any to this, they would have done that.

louder is *not* faster, its just more annoying.

I'm not looking for performance, just for the car to sound less like a hairdryer and more throaty. I've already got one muffler off (planning on doing both), and it burbles a little stock. Looking to increase this, maybe more mid range throat when not WOT.

I have a stock exhaust on my CLS400 and man it was designed to be as quiet as a mouse. I'm trying to get my hands on some E43 or C43 mufflers then doing a secondary cat delete so it sounds like an E43/C43.

your vehicle's cabin is very soundproofed, so the exhaust pipes out the back would have to be LOUD for you to hear anything, and your neighbors will hear a lot more of it.

As far as I'm aware the specific car I have (2013 E350) has only one set of cats, and one set of resonators. Am I wrong? I've seen someone do an X-pipe in place of the resonator with minimal improvements to audio to everything but the cold start. Do you have an audio clip of any cls with the cat delete w/ c/e43 mufflers?

repost

Agreed, I'm not looking for something obnoxiously loud. Just when under acceleration to have a bit more throat than it has now.

No. I haven't done anything yet as I still need to find and buy the mufflers. I've noticed that the mufflers on my car are very large; 1.5x larger than the E43 mufflers which are quite smaller (smaller mufflers = more sound). I also have a burble tune so I'm hoping it can sound just like it.. I don't want anything loud or droney, I just want to be able to hear it while I accelerate, and while I'm coasting, for it to be quiet as it is now.

Mine are rather large too, but what you're wanting to do is essentially the same goal I have in mind. For your burble tune, did you get new catless downpipes? From what I've heard those eat thru cats. My car burbles a bit stock, I'm trying to increase that. Would deleting the resonator make it louder? And where did you get your burble tune done?

People online usually say a resonator/secondary cat delete brings them out more. My exhaust is the cats>resonator>secondary cat>two mufflers. I heard for the E400 that someone deleted the resonator and secondary cat, and it was super droney. So I'm gonna leave the first resonator in as I believe that the first resonator does more work than the second resonator (secondary cat). I did not get catless downpipes, I don't want the smell of gas in my cabin, and there's no emissions testing where I live lol. I don't even run the burble tune now as it's being fixed, but I'll probably run it for the summer months only. I've seen so many people with super aggressive burble tunes and it not do anything to the cats. All of those guys with C43's tuned with burble tunes never have any issues, and you never see threads on forums about their cats going bad. I have heard of burble tunes messing up O2 sensors though which are cheap. I got a stage 1 tune + a burble file from Eurocharged Houston.

Gotcha, theres actually a eurocharge place near me. How much did the tune run you? Thanks for your input.

$800 USD with the handheld.

the E350 is designed to stay at very low RPMs almost all the time... in normal driving around town, unless I'm on a freeway, the RPMs are usually UNDER 1500, and rarely briefly hit 2000 for moderate acceleration, all this saves a lot of gas vs running the engine at 3000+ RPM like my older cars did. sure, running up the RPMs with full throttle acceleration uphill to freeway speed will run the RPMs up. cruising on the freeway at a steady 70

and yeah, there's no 'secondary cat' on these, the catalytic converter is at the bottom of the main downpipe that comes off the exhaust header, then there's a resonator/premuffler, and the final muffler in back. whatever you do that will make the car 'burble' at 1200 RPM will make it scream at 4000 RPM. my usual snarky suggestion is to punch holes in the floor boards, and run the exhaust right into the cabin so YOU can hear its full effect. OR, play a recording of a Mustang V8 on the lovely stereo. I'm pretty sure these have OX sensors before AND after the cat, if you remove that cat, the car will throw check engine codes because its failing to smog itself.

Burble meaning backfire. The car sounds pretty good when my foots to the floor, but like I said I'm looking for more mid range throat. Not looking to delete cats.

"backfire" means unburned fuel is being burned in the exhaust system. literally wasting gas by intentionally running the engine way too rich, something the direct injection of the M27x motors is designed to avoid under any conditions.

I havent done anything to the car aside from a muffler delete. Its completely stock. Some cars burble stock

I can personally attest to this... 😂

I'm a runner in a town full of german cars. I do a route of at least 6 miles through town every single day. Outside of the ghetto trash blasting subwoofers, the people I despise the most are Audi and GTI drivers (they all have the same drivetrain anyways) with their beat to **** backfire tunes. Nothing like decelerating for a stoplight at 10mph and it sounds like an eastern european warzone. Absolute garbage people that do this. If your car does not sound nice stock, don't go out of your way to turn it into a trashy ghetto piece of ****.

Actually, I should give an honorable mention to BMWs with the turbo 2.0 or 3.0s, who seem to be offenders of this too. The occasional G37 or maxima with the same engine pulls that crap too. Losers, each and every one of them.

Edit: to be clear, I'm referring to the useless burble/crackle/backfire tunes only. A decent aftermarket exhaust can be....ok

Pops at 10mph? Lol. My pops and bangs tune only allows for them to start at 3300rpm. Anything under that and I get nothing which is what I like. I drive in eco most of the time anyway and I don’t even go past 2k rpm.

Trust me, I'm not trying to make my car sound like its from a Pakistani warzone. Just a decent aftermarket exhaust that wont run me two grand

Yea, my bad.. I was in a bad mood..

Did you end up doing anything to youre car , I have the same exact car and want to do the same thing just wondering how it sounds