Bayside2000

Same problem with my 2022 GLC 300. Purchased certified pre-owned. It was a loaner, 12k miles when I purchased it. Steering vibrated right when I hit the freeway near the dealer. Why it wasn't fixed or noted earlier, I don't know. However, at my first service I'm going to bring it up to be corrected. Sometimes the vibration stops right away, but if there are several bumps on the freeway it can keep vibrating till I slow down or speed up.

W205C43PFL

Hopefully the software update solves it for you.

Benz_benzGLC300

Yes, this problem is pretty standard on all the GLC 300s that Mercedes makes. It is a pain to have to take it to the dealership I agree. I had to take mine in 3 times for mine until it was fixed but I found the software update and posted it on here for others to use. Mine is a 2022 GLC 300 as well. Good luck.

W205C43PFL

Yup thanks for posting it, forum member Bayside2000, in case you didn't find it, forum member Benz_benzGLC300 posted the bulletin being LI46.35-P-062791

don w

I've had the vibration since day 1. Went for one year service, and the vibration was the first item on my "to check list". The service writer said it was a factory electronic update that would correct the problem. I was doubtful, but it did irradicate the problem completely. I don't know if it makes a difference, but my Dealership is Ray Catina of Edison, which is one of the premier dealerships in the country.

W205C43PFL

Glad it solved it, the vibration as others mentioned has to do with software in terms of the way MB tuned it prior to the software update, the new update refines this tune and adjusted the behaviour hence why it corrected it.

PeteInGilroy

So our 2021 GLC has the steering wheel vibration but not so much over bumps. It does it over 45 mph when just slightly turning the wheel. The road conditions don't make any difference.
Will the software update correct this?

Bryce1023

I have 2 2022 GLCs both have had the software update for steering wheel vibration. Both still have very slight variation occurring for no apparent reason/event, at least to me. The sales manager at one of the dealerships said when the power steering was changed mid cycle on the GLC the vibration issues began. Was not really listening very carefully to his explanation, however, he believes that there will be a recall down the road, the problem is too widespread for there not to be.
Years ago if there was a problem with any ordinary brand car the explanation was “ hey, you didn’t buy a Mercedes “. Now when you hear about so many quality issues with Mercedes my response is “ hey, you didn’t buy a Lexus “.

W205C43PFL

Interesting, I wonder what changed because as far as I remembered there were no complaints about the handling or steering feel/performance for the pre-facelift version.

Bryce1023

I too owned a 2017 and a 2018 with no problem. I believe in MB attempt to make improvements something went awry.

W205C43PFL

I wish someone from the inside can chime in, what made MB think the previous system was broken so they have to "fix" it.

S70Houston

You know, .............................. ENGINEERS, ......................... can never leave well enough alone.

Same here, 2018 GLC300 4Matic with no issues.

W205C43PFL

I mean I am curious for sure, was hoping to know what are different, I get it the part number is different but what about the actual hardware what was different. Wish someone have the documentation somewhere.

mikapen

Step #1 in troubleshooting a wheel vibration: BALANCE!
​​​​​

W205C43PFL

It is a known issue software issues for the facelift GLC though. other than that, balance, alignment, and I guess check tires (wear) and wheels (bent or cracked)?

Bryce1023

The vibration issue is so widespread, and is not necessarily triggered by a particular event, the balancing of the tires is not the solution in the vast majority of the cases. It was recognized as a software issue by MB, and that has significantly improved the situation once the update was done. IMO there has to be a recall, once MB can figure out what to do, to completely eliminate the problem. I guess a MB sure “ain’t” what it used to be. I still buy them, however, I am quite cognizant of the mediocre reliability and less than stellar resale value of these vehicles. Heck, I know the real simple fix, but why does Lexus have to be so boring?

mikapen

Lexus is becoming a Recall leader over the last few years. Lots more than MB, both on numbers and percentages. It's called "Resting on their laurels."

Don't rule out tire balance as a cause. Software or not.

W205C43PFL

Interesting, I didn't know that.

W205C43PFL

Ya but the problem is they didn't have to change whatever they changed for the facelift, the pre-facelift steering was flawless. This is them change for the sake of changing things.

mikapen

​​​​​​I think the vibration issue started in 2020, as well as the software Fix. Our early 2019 hasn't experienced the issue. MY MMV.

mikapen

​​​​​​I think the vibration issue started in 2020, as well as the software Fix. Our early 2019 hasn't experienced the issue. MY MMV.

W205C43PFL

but 2019 is pre-facelift though... the vibration happened in facelift GLC.

mikapen

​​​​​​It was reported pre facelift I believe.

W205C43PFL

I see but I never heard of but you might be right though given that you have been on the forum way longer than me.

mikapen

It's been reported on the x253 forum for a couple of years. Our 2019 doesn't seem to be afflicted.

Here's a post with the software code -
https://mbworld.org/forums/glc-class...ml#post8709785