ttljj2003

Hi, does anyone know that why E220d amg line engine has rumbling sound when driving keep at 30mph to 40mph? It doesn’t happen when rapidly accelerated, only happened at a constant speed. It should be very quiet at 30mph in the cabin, right? Someone told me it is 19” alloy make the cabin noisy, but I think the rumbling sound from the engine.

2012 merc amg

Maybe the diesel just hits a certain rpm and vibrates some creating a resonance. I use to have a vw tdi and it did that. Try downshifting a gear so the engine Revs higher at that speed. If it goes away it’s engine vibration. You could try coasting too. If your coasting and it does it probably tires/wheels.

SCRL

Is the sound different when it's warm vs cold? My 220d is very quiet and smooth when it's cold (can't tell it's a diesel), but once its FULLY warm it's quite noisy/dieselly on light throttle/low speed (such as when pulling away gently or speeding up in traffic). At higher speed it's whisper quiet. I'm continually wondering whether this is "normal" for this engine, or whether I need to go and have an extend "I can hear a noise you can't" conversation with a dealer... :-(

ttljj2003

I will try coast next time to hear the sound, thanks!

ttljj2003

it’s different when it’s cold and warm, mine is same as yours quiet when it’s cold, after fully warm its sound become louder, by the way is yours e220d SE or AMG line?

SCRL

VERY interesting... Mine's an SE, on 17" wheels.

Don't know where in the world you are - I'm guessing probably not anywhere near Cambridge in the UK??

ttljj2003

Ha,ha, not too far from you, I am In Kent in the UK.

ak_ku

I am wondering the same thing. Maybe they are related. Mine is 2017 S213 (E220D). Around 30000km on it.

Having strange knocking / ticking sound when idling and decelerating (gas off) from 1500rpm -> 1200rpm.
In relatively slow speeds (population centres, when you can hear it). This seems to happen only when engine is warm/hot.

It sounds like normal diesel knocking, but much louder and only in the rev range above. High pressure injector?
Or somebody could describe it also with timing belt slapping, when loose.

Other than this, engine works normally. No problems.

Attached few videos. Do not mind the whistling sound in the video, I have roof racks. Any ideas?

SCRL

I couldn't really hear the sound in your videos very clearly, but your description is EXACTLY how I would describe what I experience. It only happens when the engine is properly warm and at slow speed, when it sounds much more like an old diesel (knocking / injector sounds). When it's cold, it's quiet. I also agree completely with your "this sounds like a timing chain" comment (although I don't think it is). I even get exactly the "ticking" sound you describe when decelerating, but again only when hot. Other than that, as you say, the engine is normal (really an amazing engine actually for its size - strong acceleration combined with amazing low fuel consumption.)

Your comments make me feel much better that it's not "just me". Still doesn't answer the question of whether this is normal though!

Anyone with a 213 220d want to say that their engine is absolutely as quiet when it's fully warmed up as it is on start up?

JessH

Just a thought from a newbie on this site, oil is thinner when hot, so not 'padding' the engine as when cold and thicker, and could knocking be timing chain, as I understand they can make a knocking when going, in which case needs replacing while you still have an engine? Here's hoping it's nothing that serious or expensive...

Music_Lover

Strange,
My 200d AMG-pack with 19" AMG wheels is deadly silent.

Music_Lover

It's hard to hear, sorry

JakeW213

It does sound different from mine, and mine has done close to 340,000 km(W213 2016)

there should be close to no sound(mine is dead quiet)

Music_Lover

Wow!
Well done.
Any issues outside normal maintenance such as brakes etc?
Would be very interesting to read about your experience.
I'm super happy with my car in all aspects. Just back from the annual service on my Miata and to kill the hour it took, I investigated all cars in the showroom - new and preowned by sitting in the driving seat checking some details. All brands and the ONLY car on the same level was Porsche.
BMW, Tesla, Audi etc left me cold.

I actually decided between Panamera and E-class - but the She wanted more cargo space.

Martin Sokol

Hey man, I think am having similar problem on my 2016 E class. Have you foudn out the issue?
I am getting frustrated because of the sound.

nejc globokar

Do you know what is wrong?

nejc globokar

Do you know what is wrong? I have the same sound

LassE-Class

Hello,

Did anyone ever find out, what caused this noise? I have the exactly same issue in my car, with 123000 KM’s on the clock

Thanks :-)

SCRL

I’m still getting all the same sounds at 40000 miles. Other than the noise, no apparent problems.

nejc globokar

No, nobody knows

Kiesaz

SOLVED!

Hi all. I've just had similar problem like you all guys. When engine was completely cold, it was all quiet. But after it warmed up a bit, car started to vibrate at 1200-1500 rpm. Especially while braking and when gearbox were putting gears down.
In my situation there was fuel lines under the bottom of the car not fixed properly. If being more precise, they weren't fixed correctly going up to the engine.

If it doesn't help for you, try lifting your car ant reving it up to hear the noise. Then there must be other guy under the car who will wobble everything under the car until you stop hearing that ****in noise. That's how i solved it.

The thing i want to say is that there is something that is lose and not tightened enough what makes huge vibration on that rpm.
Good luck.

LassE-Class

Thank’s for the fuelline-post :-)

I still have the noise in my E220d.

But when the car regenerates the DPF, the noise is completely gone.

I'm sure it's combustion noise; but how to fix it? I don’t think it’s defective diesel injectors - rather some software-stuff. :-/

Kiesaz

Hi,
It still looks like totally similar to my problem with fuel lines. I had also sound gone when DPF regeneration but I don't know how did it affect it.
I would offer you to double check those lines where it starts going from the car botton to the engine.
I was sitting in the car and reving to hear that sound while the car was on lifter and mechanic was wobbling those lines until noise was gone.

Teijak89

Hey. has anyone been able to find out the fault in question and what causes the knocking sound during engine braking? can only be heard when the car has warmed up properly, and not always. already had my car serviced because of that sound for more than 6000 euros and the problem still hasn't been resolved. help me.and my car had been driven for 120,000 km when the fault appeared, and currently 150,000 km on the odometer

Dale78

Did anyone meanwhile identify the problem?