Petje

So got my 43 about a month now and noticed in the German Autobahn that the car is vibrating at speed from 125 mph upwards....

anyone else recognize this?

Also have a hum, hum, hum noise at around 65 mph and goes away at higher speeds.

GWSHARK

Check thread on harmonic vibration, seems to be a driveshaft issue, multiple people on hear have complained of same hum hum hum at 100-120kmh , as for higher speeds not available here in Canada so cant comment.

Petje

thanks read it, the strange thing is the car dont vibrates with the humming noise....

it only vibrates at higher speed, not that i need to hold the steering wheel, my wife didnt noticed it, but i feel it ....

and it doesnt get worser from 125mph to 160mph... it’s just there

think i had to let check the tyres first...

Harold1898

125 m/ph would get you straight to jail over here. Good luck to you being able to do that.

Petje

yeah German Autobahn has on some trajects no speed limit! So always nice to go there to see what your car can

so also granny’s are cruising their 120mph in their Renault Twingo

Ren Rosen

I have the 2018 c43 I can go 160km/h easily and I’ve never had this vibration humming


QUOTE=Petje;7937950]So got my 43 about a month now and noticed in the German Autobahn that the car is vibrating at speed from 125 mph upwards....

anyone else recognize this?

Also have a hum, hum, hum noise at around 65 mph and goes away at higher speeds.[/QUOTE]

White One

[/QUOTE]
I am surprised no one has mentioned run flat tires..

Ren Rosen

I am surprised no one has mentioned run flat tires..[/QUOTE]
what about run flats ?

Petje

Do you think this can be the issue?

Ren Rosen

Not a chance. Run flats will not cause a humming or buzzing . Tbh it’s most likely your engine. Is this a used model ? U said 2017 so perhaps it’d take a better look at it. Run flats only downfall is they have reduced tread wear.

White One

I don't wish to hijack the thread, I would think any abnormalities at 125 plus have potential to be tire related, but thats just my opinion. I just mentioned the run flats because I'm not a fan..to each his own.

jonathan358

Get all of your wheels balanced. Did you do a tire swap? Should balance every time you switch from summer to winter.

Otherwise it is probably diff/driveshaft related.

Petje

the humming sound dont change if i release throttle, switch gear or anything like that!

Petje

Think i swap them for Michelin PS4S like others here and see if this changes anything!

i also have the tyre skipping issue and think this is also a RF thing.

Only have to figure out if there is a spare tyre available for the C43 just in case

Bougy

Hi I have a glc43 from 2017 and exactly the same issue. I am fighting with this for 2 years. I had 12 different winter wheels and now 4 amg 20" for winter (same model as for summer) and in germany, after 160kph, I feel it (even at 140 I can hear the humming and feeling the vibration).
I did the balance for the tyres 3 or 4 times, at mercedes, at a sports car specialist ... same
I think I saw here a tevh note from MB usa for this, i'll search for it

Petje

Hi Bougy,

change tyres soon so hope it’s over than

i notice zero vibration but only from 200 km/h it starts to vibrate...

Car is not shaking, stability also dont change it’s just a weird vibration....

have new Michelin’s soon and when i can try it i do and report back

think the wheels also causes the humming sound

Petje

So had my tyres changed for Michelin PS4S

- no tyre skipping
- no humming noise anymore

changed the car in a positive way it

duch7duch

Hi,
I have also reported to the dealer a problem with the vibration above 160 km/h. for the third time. At the beginning they told me what this is coused by braking discs. Secound time it was rims and tires. but last week i left the car in the service and take the service master for a ride. I drove with him 160 km/h up to 260km/h and car was behaving the same, it means equal to sinusoidal vibrations with noise. At the moment they checked half of the car and they dont know what is going on. At the moment this case in Mercedes Poland - Warsaw. We are waiting for their feedback.
If you will have any solution from yours country just let me know.

Kacper

Petje

i have changed to non RF but havent got above 160, when i can test it i come back on this

W205_AMG

Its the drive shaft. I had mine replaced at 1100 miles on the car. Took it to one MB dealer who kept it for 5 days and said it was the run flats and basically to get lost. Called a second dealer and explained, over the phone, to the service advisor about the rhythmic humming at 65+mph and he immediately said "yep that's your driveshaft, i've done about 15-20 on C-class cars this year (in 2019.) 2 days later I picked my car up with a new driveshaft and haven't had an issue.

W205C43PFL

@zibby43 I just realized something buddy. Isn't the pulsing issue we are experiencing the same as the threads we replied to? I feel super dumb not realizing this earlier xD.

https://mbworld.org/forums/c450-c43-...ise-issue.html
https://mbworld.org/forums/c450-c43-...vibration.html

Apparently the issue is either the centre driveshaft bearing or the whole driveshaft.

The solution would be either change the bearing or order another driveshaft balanced by Mercedes-AMG in Germany not just Mercedes-Benz as the driveshaft balanced by Mercedes-Benz isn't going to work.

Let me know if changing your driveshaft after balancing from AMG works.
It should solve your problem.

zibby43

Thank you. That’s very helpful. I’m probably going to end up replacing this car.

Have you gotten your vibration issue solved?

W205C43PFL

@zibby43
Already? Term end or just want a new car?
If so, what car are you considering?
Either way though, good luck on your next car. Hopefully a trouble free ownership.

zibby43

Thanks man. Appreciate the kind words. Your persistence and thoroughness in researching your issues, posting your findings, and helping other members with their issues is what makes this board a good one.

Hope that good karma pays off for you and your vehicle situation as well.

Still have 20 months or so on my term, but Merc is willing to make the car go away so long as I lease or purchase another MB.

I have my eye on a ‘20 Polar White sedan w/ Night Package, Saddle Brown interior, PE, Multimedia, AMG Drive Unit, Lighting Package, etc.

3) things are keeping me from pulling the trigger: 1) What if it suffers the same issues as my ‘18? 2) Is Polar/Saddle a good color combination for this car? 3) I don’t like the power delivery in the C43. It dies in the top end.

W205C43PFL

Thanks for the kind words too really appreciate it @zibby43 and yes I do hope things does get solved for me eventually. Fingers crossed, so far the vent whistle and hissing noise, diff whine and this vibration issue otherwise all is good.
I am surprised you went for another C43 but hope it doesn't have the current issues you have.
Yes this board is one of the better boards out there, I too appreciate all the input other members gave.
As for the interior, it is really a personal taste. If your city is constantly hot, dark interior might not be a good idea because dark colors attract heat.
The saddle brown is a nice choice. White makes the lines pop on a MB so white is great too.
As for the body style are you sticking with w205 or you want to get a c205? At least c205 coupe C43 are built in Germany in the North American market.
Forgot but didn't the facelift had a power boost? Bigger turbos probably solved the power delivery issue. I don't know if they changed the tranny but maybe not, still just a torque converter I guess.
But the ultimate choice is yours.
Happy car shopping!