GLS Class (X167) Produced 2020 to present

Malfunction: Do not exceed 50 mph

Old Mar 23, 2024 | 10:10 PM
  #1  
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Malfunction: Do not exceed 50 mph

My MY24 GLS experience so far has been something like this:
  1. For the first 1,000 miles, do not exceed 85 mph.
  2. After 2,000 miles, do not exceed 50 mph.


My vehicle now has 2,000 miles on it and both the yellow suspension light (I have E-ABC) and the engine light have been randomly coming on and going off for the last week.

I am currently obligated to transport 6 people on a regular basis. This is a key reason that I selected the GLS.

However, the dealership has no 3-row loaners of any kind. Googling this issue seems to indicate that it takes a minimum of 3 days to diagnosis and repair this issue, if the parts are on hand.

I reached out to the Sales Manager, who determines what goes in the loaner lot, this week and after many short and unhelpful exchanges with my service rep, it was nice to see that he was working to resolve this in the near future.

However, back to the current situation where service does not any loaners available for two weeks. I asked multiple times this week if I could bring it in earlier without a loaner to at least get a diagnosis, and each time I received no response at all.

Needless-to-say, 3 months in and I am struggling to feel like a customer that the dealership wants keep doing business with. I have two MB vehicles that need service and no other options within an hour drive. I also purchased some of the extended/prepaid service options that somewhat keep me stuck in this relationship. Hopefully, I can find a way to improve this over time...

On the topic of E-ABC, have people run into these problems and found them to be a one-time fix? Or do you get this message and need E-ABC tweaks and fixes every year?
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Old Mar 23, 2024 | 11:53 PM
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GLE 580
30k on a GLE E-ABC with no issues besides dirty camera (easy DIY fix). Friend has same with 55k and no issues besides dirty camera too.

​​​​​​Is the suspension still working in the various drive modes?
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Old Mar 24, 2024 | 09:39 AM
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I was on the interstate doing 80 mph when it popped up and said don't exceed 50 mph.

Then and since then, I have not noticed any actual change or issue with the vehicle performance or the suspension.
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Old Mar 24, 2024 | 11:27 AM
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Originally Posted by Splaktar
My MY24 GLS experience so far has been something like this:
  1. For the first 1,000 miles, do not exceed 85 mph.
  2. After 2,000 miles, do not exceed 50 mph
    .........
That's putting it in perspective!
I appreciate your sense of humor during this dilemma.

On occasion, I've seen a dealership hit the rental car agencies when they were short of loaners.
Hang in there!
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Old Mar 24, 2024 | 12:35 PM
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Originally Posted by Splaktar
I was on the interstate doing 80 mph when it popped up and said don't exceed 50 mph.

Then and since then, I have not noticed any actual change or issue with the vehicle performance or the suspension.
If it's still functional then it might be a single defective strut. That's really the only major problem I've seen with E-ABC so far besides the dirty camera. The only TSB I've read simply mentions the strict avoidance of dirt and soil while servicing a certain part of it.
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Old Mar 24, 2024 | 05:47 PM
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So there are techs who know what they're doing w/the E-ABC? That's reassuring!
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Old Mar 24, 2024 | 07:34 PM
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Originally Posted by EWL5
So there are techs who know what they're doing w/the E-ABC? That's reassuring!
Good point. @Splaktar, I would print this TSB and give it to your SA when you get your suspension examined.
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Old Mar 24, 2024 | 08:37 PM
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I drove around a little today. The suspension is still making adjustments to keep the vehicle level. However, going over speed bumps and imperfections in the road was rough, like E-ABC was disabled.
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Old Mar 24, 2024 | 08:43 PM
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Originally Posted by wildta
If it's still functional then it might be a single defective strut. That's really the only major problem I've seen with E-ABC so far besides the dirty camera. The only TSB I've read simply mentions the strict avoidance of dirt and soil while servicing a certain part of it.
This issue started after I brought the vehicle in for ceramic coating, window tinting, PPF, and interior protectant. When I picked up the vehicle, the check engine and suspension lights were on. It was the end of the day, so I didn't go in and complain but I did immediately text my service advisor, who never responded.

I know that the tint and PPF were applied by outside contractors.

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Old Mar 25, 2024 | 09:11 AM
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I have E-ABC and had this issue a year ago. Dealer found there were communication faults between control unit and the right front and left rear suspension strut units. Dealer cleared faults and performed a software update. No issues since.

Last edited by TNS550; Mar 25, 2024 at 09:15 AM.
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Old Mar 25, 2024 | 10:16 AM
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Originally Posted by TNS550
I have E-ABC and had this issue a year ago. Dealer found there were communication faults between control unit and the right front and left rear suspension strut units. Dealer cleared faults and performed a software update. No issues since.
That's great news! I hope that it is that straightforward. How long was your vehicle in the shop?
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Old Mar 25, 2024 | 11:17 AM
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Originally Posted by Splaktar
That's great news! I hope that it is that straightforward. How long was your vehicle in the shop?
Just overnight. I dropped it off about 10 one morning and picked it up the next day at lunch. They wanted it to sit, then idle, then they drove it about 10 miles.
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Old Apr 2, 2024 | 05:23 PM
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It went in the shop yesterday morning and it didn't get looked at all day. Apparently, a number of techs went home sick.

Today, they isolated the issue to a faulty left front acceleration sensor. They didn't have one in-stock, but one should be here tomorrow. They say that it will fix both the yellow check engine and yellow suspension lights. 🤞🏼
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Old Apr 4, 2024 | 02:01 PM
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They said that it was ready yesterday, but they asked me to pick it up today so they had extra time to verify the fix. I agreed and said I want to be sure it is fixed before I pick it up.

This morning, I came to pick it up and first thing when I started it: Malfunction: Do not exceed 50 mph...

I calmly walked back in to my service advisor and said that the same error is still there. She said that the tech took extra time to ensure that it was resolved. Obviously, neither of us understood why the tech would say it is resolved when the error shows up the first time you start it.

So it's back in the shop and they said that they won't have any update for me until tomorrow morning. 🤦
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Old Apr 4, 2024 | 02:16 PM
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Probably not enough of the sick techs stayed home.
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Old Apr 5, 2024 | 12:49 AM
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Beyond Frustrating

Originally Posted by Splaktar
They said that it was ready yesterday, but they asked me to pick it up today so they had extra time to verify the fix. I agreed and said I want to be sure it is fixed before I pick it up.

This morning, I came to pick it up and first thing when I started it: Malfunction: Do not exceed 50 mph...

I calmly walked back in to my service advisor and said that the same error is still there. She said that the tech took extra time to ensure that it was resolved. Obviously, neither of us understood why the tech would say it is resolved when the error shows up the first time you start it.

So it's back in the shop and they said that they won't have any update for me until tomorrow morning. 🤦
I admire you for holding your cool.
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Old Apr 5, 2024 | 05:36 AM
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Originally Posted by wyatt88
I admire you for holding your cool.
I am trying not to completely burn the bridge with the only dealership within an hour's drive. Especially since I prepaid for some service. But they are making that really hard. I may have to look at the breach and termination terms of that prepaid service agreement. I have so many other things that I need to spend my time on...
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Old Apr 5, 2024 | 07:16 AM
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Originally Posted by Splaktar
I am trying not to completely burn the bridge with the only dealership within an hour's drive. Especially since I prepaid for some service. But they are making that really hard. I may have to look at the breach and termination terms of that prepaid service agreement. I have so many other things that I need to spend my time on...
This is generally why I don't like prepaying for stuff. I never know what's going to go on with the car!

I know you can usually get a prorated refund on an extended warranty but I'm not sure about prepaid service agreements.
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Old Apr 5, 2024 | 07:50 AM
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Here's the part number that they replaced for the left front acceleration sensor: https://mbparts.mbusa.com/oem-parts/...sensor-9057600.

The fault code they found was C154609.

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Old Apr 5, 2024 | 07:54 AM
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Originally Posted by EWL5
This is generally why I don't like prepaying for stuff. I never know what's going to go on with the car!

I know you can usually get a prorated refund on an extended warranty but I'm not sure about prepaid service agreements.
PPMs have a carve out for prorated refunds in CA while the other states do not provide a refund and can only transfer the remainder to the dealer or private party.
​​​​​​
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Old Apr 5, 2024 | 08:42 AM
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They say that they found a pinched wire that was causing the warning. It is ready to go.

I have seen a number of reports in the past of pinched wires causing all kinds of random and hard to diagnose issues. So hopefully, this fixes it for good.
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Old Apr 5, 2024 | 08:52 AM
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Originally Posted by Splaktar
They say that they found a pinched wire that was causing the warning. It is ready to go.

I have seen a number of reports in the past of pinched wires causing all kinds of random and hard to diagnose issues. So hopefully, this fixes it for good.
Where was the location of the pinched wire?
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Old Apr 5, 2024 | 03:10 PM
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Originally Posted by Splaktar
They say that they found a pinched wire that was causing the warning. It is ready to go.

I have seen a number of reports in the past of pinched wires causing all kinds of random and hard to diagnose issues. So hopefully, this fixes it for good.
A pinched wire was my thought from your initial description. They're often intermittent and elusive.
I'll bet you're good to go.
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Old Apr 5, 2024 | 05:31 PM
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Originally Posted by wildta
Where was the location of the pinched wire?
I am waiting on them to provide this information.

I was able to pick it up without any warning lights on this afternoon. Glad to get it back!
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