rgloco3

Also, tried turning off the ESC...but that did not make a difference. Time to write a formal letter to Mercedes. Dealership believes it falls within what one should consider normal. I beg to differ.

RRrocco

Sorry to hear that the problem is not fixed rgloco3.
So I called MB customer service and stated what I did to fix the problem by selling the vehicle and Still waiting for a response from them. I thought that I would hear back from MB if a customer went that far.
But I really think that everyone should call -email- write MB so they can find a fix.
Good luck to all of you and hope a fix is found soon

Jblue

Good news! Got a call from my dealer's service dept. the other day.
Seems MBUSA now acknowledges the issue (the dealer's service department "could not verify the problem.")

They are supposedly researching the issue (at least one other GLC owner has reported it to my dealer as well) and "will be engineering a fix". We will be notified when it's found......stay tuned.

Nice to know when you are not crazy.....and also that you know more about your car than the dealer.....just sayin'.

MITCH1975

We have pretty smooth roads out here in Arizona, since it never rains or snows. But the other day I did hit a manhole cover that was not level and the front end jumped. It was a little worrisome to feel not quite in control of the car. I felt like the front end jumped over a few inches in it's track. Would be nice if they had a fix for this.

metalhawk

Hi all, I am waiting for my new GLC and getting worried from what I read here...

Can you specify if you have run-flat tires or not? That could potentially also make a difference

gianky

Hi to everyone. I'm pleased to hear about other oversea benzer sharing my same problem. Also my GLC250d (this the name MB gave in Italy for the 2.2 biturbo diesel engine) is affected by the reverberation issue. My GLC has air body control.
Wish to tell you that also someother italian MB forum member's (http://www.mercedesbenzclub.it/forum/) do have the same issue. Unfortunately MB has not yet reached a solution for the problem. Personally will arrange for a MB inspector tes drive in the next few weeks. Hope this kind of twinning will help everyone. Will keep posted here about any development.

jeffzou

Any new update? My GLC does this as well.

Jeff

HotRodW

Those of you having the problems, what diameter wheels do you have? Runflat tires are still not the equal of conventional tires in terms of ride and handling, and shorter sidewalls only make things worse. I'd like to see if mounting conventional rubber makes a difference before we place our order.

gianky

19" wheels, standard tires, abc.

HotRodW

Anybody with the 18" wheels having problems? That's what we test drove, and the ride felt quite refined. I couldn't feel any of the typical runflat harshness I was expecting. We were planning to order the 19's though. As a former runflat-equipped BMW owner, I know how much difference an extra inch of sidewall can make.

jeffzou

This problem is not a run fllat ride hardness issue. As best as can be described in my situation, it feels as through eith the shocks or springs were failing and the car was vibrating or bouncing over road imperfections. The higher my speed the more intense the vibration.

I've been down the run flat hardness situation. This just is not that.

I took the tires down the a more reasonable 32 PSI from about 40 that my car was delivered at. I thought that helped a bit. But not for long.

I also have 20" rims and tires (factory models not aftermarkets).

It's just a very disheartening feeling.

Jeff

dsliwi

New Here... we purchased a launch edition GLC several months ago. We felt the funkiness in the front end at high speeds... I guess we're used to it at this point. All loaners have this issue. However, the front vibration from hitting a washboard road or a recessed man-hole cover is something else!! And none of the loaners have had this issue. It was slightly improved after the first complaint but has since grown so bad that the right combination of speed (say 35 to 55 mph) and multiple bumps can send the front end and steering column into a fit of rage that can last up to 30 seconds.

GreyGLC2016

I have my car, GLC300 since Dec 2015, started noticing slight vibrations in steering wheel when driving over minor bumps around 3 months in. I didn't really pay it too much attention because it didn't really disturb the drive - meaning it still felt "safe". Here we are in Aug2016 and the car feels like its going to lose its wheels when I drive over bumps in the road on the highway, sewer grate covers, minor potholes or raised pavement. When driving in reverse, there is a knocking/rubbing noise on the front tires only, even at slow speed. I took it to the dealership, they had the car for 5 days, each day saying they are still looking into the issue. Finally day 5 - they said they know what the issue is - steering related - but there is "no fix at this time" and they deemed the car "safe to drive". I don't feel so safe...

I read there was a recall on certain models manufactured during 6/2015-11/2015 - I believe my car was in that batch, but it would appear that there is a FIX for the steering issue.
https://www.cars.com/articles/recall...1420684268082/

Not really sure what else to do...any suggestions, or similar scenarios?

psecor

I am having the same issue. Dealer tech had no suggestions or really a clue. My take (based on a few years as a mechanical engineer) is that the suspension is not tuned correctly. The vibration is damped in a car without this issue.

I'm quite concerned about how this could create a loss of control on an icy or wet road. The chatter means the tire is being unweighted and weighted rapidly which is similar to what happens during a skid. I don't mean to be an alarmist but I really think this is a serious issue.

I suggest we continue and add to this thread and use it as we engage with our respective dealerships and MB regional managers.

dsliwi

ok so, after having my car for 15 days and waiting for MB to reply: "it's safe to drive" come pick it up, and a "software fix should be ready by late September or October".
WOW!!!! this is blowing my mind!!!! Not what I was expecting from MB; not sure what I'll do. GreyGLC2016, psecor, jblue... any updates? Does anyone else scratch their head at how such a thing could involve a software fix?

ec_nova

you do realize that nobody is buying this BS you're spitting out, right?

RRrocco

I had the same thing with my GLC. And had the same BS told to me. Some of these glc have this problem and MB is clueless on how to fix and in the meantime shoveling us the BS.. And until you have experience this when driving its a scary thing. That is why after 6 months i traded the car in for something else.
And its sad to see that MB has not found a fix as of yet.

napickard

Thanks for everyone's input into this annoying issue. Had mine in for 10k service yesterday and they confirmed the issue, shared the service bulletin and now I have to wait for a resolution. At least they acknowledge there is an problem.

BmwGLC300

My GLC300 has same problem, production month 2016/5. Almost every time front wheel hit convex object on the road surface wheel vibrated. Especially, front wheel hit the convex object before stopping, it feel likes it will lost control very dangerous. This problem is a 100% safety issue. I guess we need to write a letter to NHTSA to push MB work harder on this issue.

I own many BMWs and not even one has this problem. In my experience, it feels like the front suspension is too much underdamped and cause the vibration.

dsliwi

.

jeffzou

There is a Service Bulletin issued for this vibration issue? Did you keep a copy of it? Can you post a PDF of it or otherwise post some identification number?

I'm going in for this next week and would like to be as prepared as possible.

Thanks

Jeff

ec_nova

There is a bulletin, however it is still under investigation. This is the only information given at the moment:

Engineering is working on an optimized Electric Power Steering software to improve the dampening characteristics of the steering system. This optimized software should minimize vibrations that may be emitted by vehicle systems such as drivetrain, wheels or tires through the steering wheel. This LI will be updated as soon as the resolution is available and your patience is appreciated.

Temporary recommendations:

1. Change the steering setting via Comand/ Individual Configurations, to “Sport” mode and re-evaluate under the same driving conditions whether the vibration is still evident or has improved.

2. Unplug the EPS (N68) and re-test, again under the same driving conditions

3. If concern is still present, please create a PTSS case & FTS or Engineering will provide further technical recommendations

GreyGLC2016

GLC3002016 I am hearing the noise (popping/rubbing) when reversing hard. My driveway has a bit of a curb and I have to reverse into it - I notice the sound, had the dealer list that as one my issues, they wrote "nothing found" on my report. But im still hearing and feeling it. Any update with these issue on your end ?

ec_nova

this is a completely different symptom than this thread is talking about.... it sounds to me like you are hearing your strut hit the bump stop because you are hitting a bump too hard causing full compression of the strut.

This thread is about steering feedback when hitting bumps/undulations at speeds over 45mph

GreyGLC2016

I'm well aware of what the thread is about but thanks for your response - my thread was directed at another user who wanted to know if anyone else shares that issue; still falls under this same overall thread. The thread title is Wheel Vibration when hitting small bumps in road (the small bump being my driveway... which then is causing vibrations in the steering wheel - in addition to a distinct sound when reversing) I think its safe to mention on this thread since for me the vibration in the steering wheel isn't only occurring at over 45 mph (I certainly am not doing 45 mph backwards into my own driveway). It is more apparent that the vibrations will occur over most small bumps regardless of speed.

I too thought it was struts issue - MB checked struts and found no issues.
My initial thread addresses all this and then some, and was just looking for an update from GLC3002016 - thanks