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Old Sep 11, 2021 | 07:53 PM
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GLE 450
GLE 450 electrical issues

Hello all,

I leased a Mercedes GLE 450 last June. I'm experiencing some issues, specifically:
  • Cruise control does not engage (getting message "non operational").
  • Driver seat does not go forward to the memory position when starting the vehicle (or goes forward and then retreats back).
  • Driver seat heating doesn't work.
Those issues are not permanent, they happen occasionally. The vehicle was in the dealership 6 times already, each time they told me that the issues are fixed, but they re appear after few days.

Any advice what can I do? Are those issues known for this model?

Thank you in advance!
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Old Sep 11, 2021 | 08:58 PM
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Sorry to hear about these issues but how come your dealership just say they are "fixed" did they not explain to you what they found and what they "fixed?", did they even identify the causes in the first place?
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Old Sep 11, 2021 | 09:14 PM
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They said they replaced the seat memory control unit. Then they said they replaced 3 control units. then they replaced the camera for the presafe warnings. Then replaced the control unit again. Then they said there is a poor ground connection and fixed it.

Each time they advised me that they replaced the control unit or heating element etc etc.

Lats time they said there is a new camera design that will be released in the fall of 2021. They said this is a common issue and MB has designed a new part to repair the issue.
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Old Sep 11, 2021 | 09:44 PM
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For every replacement of the control units, was the part number ever changed?
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Old Sep 11, 2021 | 10:02 PM
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They didn't mention it.
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Old Sep 11, 2021 | 10:04 PM
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Originally Posted by ak1004
They didn't mention it.
No worries, look at all your work order and compare the part numbers, you can tell that way.
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Old Sep 11, 2021 | 10:10 PM
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Here is what I found
In which DISTRONIC is the cruise control you were talking about. (If you optioned Driver Assistant Package Plus)
Attached Files
File Type: pdf
LI46.11-P-071594.pdf (38.0 KB, 213 views)
File Type: pdf
LI91.30-P-069668.pdf (42.5 KB, 180 views)

Last edited by W205C43PFL; Sep 11, 2021 at 10:12 PM.
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Old Sep 11, 2021 | 10:16 PM
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For seat heating, did the LED lights turn on and turn off shortly like described in the document?
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Old Sep 11, 2021 | 10:35 PM
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Originally Posted by W205C43PFL
Here is what I found
In which DISTRONIC is the cruise control you were talking about. (If you optioned Driver Assistant Package Plus)
Yes, I have Driver Assistant Package Plus
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Old Sep 11, 2021 | 10:36 PM
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Originally Posted by W205C43PFL
For seat heating, did the LED lights turn on and turn off shortly like described in the document?
Yes, they did. Which document?
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Old Sep 11, 2021 | 10:56 PM
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Originally Posted by ak1004
Yes, they did. Which document?
Not sure if the files uploaded correctly but please see the attachments in post #7.
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Old Sep 11, 2021 | 11:06 PM
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Originally Posted by ak1004
Yes, I have Driver Assistant Package Plus
I see, then the service bulletin applies to you. (Please see attached in post #7)
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Old Sep 11, 2021 | 11:38 PM
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Originally Posted by W205C43PFL
Here is what I found
In which DISTRONIC is the cruise control you were talking about. (If you optioned Driver Assistant Package Plus)
It looks like, for the distronic, all they want the dealer to do is some research and report the findings. It looks like the dealer doesn't have authorization to do anything yet.
And the dealer will have to wait until the factory finds a solution and authorizes the repair.
Am I reading that correctly?
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Old Sep 11, 2021 | 11:53 PM
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Originally Posted by W205C43PFL
Not sure if the files uploaded correctly but please see the attachments in post #7.
Ok, I see the documents.

For the Seat Heating, it says "The new control units are available and can be ordered." - and the document is from a year ago. But they said that they did replace the control unit - and yet the issue still persists (not all the time).
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Old Sep 12, 2021 | 08:33 AM
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Originally Posted by mikapen
It looks like, for the distronic, all they want the dealer to do is some research and report the findings. It looks like the dealer doesn't have authorization to do anything yet.
And the dealer will have to wait until the factory finds a solution and authorizes the repair.
Am I reading that correctly?
I am afraid those are the instructions MB gave the dealerships. Sad, but it is what it is.
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Old Sep 12, 2021 | 08:36 AM
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Originally Posted by ak1004
Ok, I see the documents.

For the Seat Heating, it says "The new control units are available and can be ordered." - and the document is from a year ago. But they said that they did replace the control unit - and yet the issue still persists (not all the time).
I looked for the most recent service bulletins for your model for this issue, however I might had missed one or two. Otherwise that is the most updated one, I guess that explains why your dealership kept replacing the modules because there are no further instructions on what happens if the replacement doesn't work other than rinse and repeat as MB seems to be paying for these despite this.
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Old Sep 12, 2021 | 08:41 AM
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The service bulletin also mentioned about PTSS case, I recommend you to tell your dealership to open one to escalate to MB Germany. Your car might meet the criteria for a potential buyback (although I don't recommend it because you might not get the options you want on your new car during this chip shortage if you wish to go that route)
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Old Sep 12, 2021 | 09:23 AM
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Originally Posted by W205C43PFL
The service bulletin also mentioned about PTSS case, I recommend you to tell your dealership to open one to escalate to MB Germany. Your car might meet the criteria for a potential buyback (although I don't recommend it because you might not get the options you want on your new car during this chip shortage if you wish to go that route)
Thank you for all your help!

After all those issues, I highly doubt that my next car will be a Mercedes.

Yes, I know that all brands can have issues. But I'm extremely disappointed and frustrated about the way the dealer handled those issues. I had cars that cost less than half, and absolutely no issues. This is a $80k CAD car, it costs more than the direct competitors, and this is completely unacceptable.
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Old Sep 12, 2021 | 10:37 AM
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Originally Posted by ak1004
Thank you for all your help!

After all those issues, I highly doubt that my next car will be a Mercedes.

Yes, I know that all brands can have issues. But I'm extremely disappointed and frustrated about the way the dealer handled those issues. I had cars that cost less than half, and absolutely no issues. This is a $80k CAD car, it costs more than the direct competitors, and this is completely unacceptable.
No problem at all. I am sorry to hear that you experienced such a frustrating experience with the car.

I didn't know you live in Canada but MB dealerships in Canada are notoriously hard to deal with (in my experience anyways, someone might have a different experience). I recommend going to other dealerships in the vicinity or even further to see if there are dealerships willing to try something else. The service bulletins are really just guidelines and if the service advisior is willing to look into trying other things they might be able to help you out.

Dealerships are not even aware of service bulletins most of the time even, many of times I need to bring it up otherwise they aren't aware certain service bulletins exists so they can't figure out how to fix problems with my vehicle, they don't bother looking it up. Since you live in Canada, the lemon law doesn't apply to you. If you live within the GTA, find a dealership owned by Toronto Retail Group (owned by MB Canada) and see if they are willing to help. Since you live in Canada, ask the dealership to open a TIPS case instead of PTSS to escalate to MB Germany.

Last edited by W205C43PFL; Sep 12, 2021 at 10:39 AM.
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Old Sep 12, 2021 | 10:54 AM
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Originally Posted by W205C43PFL
****"""
Dealerships are not even aware of service bulletins most of the time even, many of times I need to bring it up otherwise they aren't aware certain service bulletins exists so they can't figure out how to fix problems with my vehicle, they don't bother looking it up. Since you live in Canada, the lemon law doesn't apply to you. If you live within the GTA, find a dealership owned by Toronto Retail Group (owned by MB Canada) and see if they are willing to help. Since you live in Canada, ask the dealership to open a TIPS case instead of PTSS to escalate to MB Germany.
That has not been my experience at all, it any dealership I've ever been to. When they enter the car into their system to service it, either they automatically check for service bulletins on that VIN, or it automatically populates their system.
The situation I inquired about, where the service department is asked by Mercedes to do research and open a case, is part of corporate troubleshooting and analyzing the situation in the field.
While that takes extra time, it's probably more likely to find a real solution then just throwing parts at it.
Sometimes the dealer gets a response same day and sometimes it may take a week or even more if it's a complex problem affecting different scenarios.
There is often an email exchange between the factory and dealers, getting feedback on potential solutions, that could be implemented everywhere. I believe that was the case with the painted over grounds, that occurred in early 2020 vehicles. In that case it also involved the body supply chain.
It's actually a pretty impressive solution.
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Old Sep 12, 2021 | 11:05 AM
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Originally Posted by mikapen
That has not been my experience at all, it any dealership I've ever been to. When they enter the car into their system to service it, either they automatically check for service bulletins on that VIN, or it automatically populates their system.
The situation I inquired about, where the service department is asked by Mercedes to do research and open a case, is part of corporate troubleshooting and analyzing the situation in the field.
While that takes extra time, it's probably more likely to find a real solution then just throwing parts at it.
Sometimes the dealer gets a response same day and sometimes it may take a week or even more if it's a complex problem affecting different scenarios.
There is often an email exchange between the factory and dealers, getting feedback on potential solutions, that could be implemented everywhere. I believe that was the case with the painted over grounds, that occurred in early 2020 vehicles. In that case it also involved the body supply chain.
It's actually a pretty impressive solution.
Thanks for sharing your service experience. Compared to the service I received (or lack thereof I received here in Canada), I spoon fed the information (service bulletins) to them and they are like, "oh ya guess we can try that", otherwise they will just say cannot figure out what is wrong or simply say cannot duplicate issue. Not every dealership cares like how yours does, unfortunately.
As for contacting MB Germany, I understand it takes time, everyone talks business days and I get it, it is a business after all. Time zones also exists so there is that.
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Old Sep 12, 2021 | 12:11 PM
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Originally Posted by mikapen
That has not been my experience at all, it any dealership I've ever been to. When they enter the car into their system to service it, either they automatically check for service bulletins on that VIN, or it automatically populates their system.
The situation I inquired about, where the service department is asked by Mercedes to do research and open a case, is part of corporate troubleshooting and analyzing the situation in the field.
While that takes extra time, it's probably more likely to find a real solution then just throwing parts at it.
Sometimes the dealer gets a response same day and sometimes it may take a week or even more if it's a complex problem affecting different scenarios.
There is often an email exchange between the factory and dealers, getting feedback on potential solutions, that could be implemented everywhere. I believe that was the case with the painted over grounds, that occurred in early 2020 vehicles. In that case it also involved the body supply chain.
It's actually a pretty impressive solution.
That accurately describes my 2 week experience with my dealer's service dept.here in New York after I got a warning about my 48 volt battery. MBUSA prescribed tests. Service Dept. did them. reported to MBUSA. MBUSA requested more test. Repeated 4 times over the 2 weeks. Finally , after checking the batteries, wiring harness, removing front seats, console and rear seat they found some paint on a body ground, cleaned it and there have been no further problems.

Previously Distronic Plus Pro, Automatic Start-Stop malfunctions had been attributed to the 48 volt battery warning.
By the way mikapen, I have E-ABC on my 2020 GLE450.
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Old Sep 12, 2021 | 12:29 PM
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Originally Posted by Hurricane1938
That accurately describes my 2 week experience with my dealer's service dept.here in New York after I got a warning about my 48 volt battery. MBUSA prescribed tests. Service Dept. did them. reported to MBUSA. MBUSA requested more test. Repeated 4 times over the 2 weeks. Finally , after checking the batteries, wiring harness, removing front seats, console and rear seat they found some paint on a body ground, cleaned it and there have been no further problems.

Previously Distronic Plus Pro, Automatic Start-Stop malfunctions had been attributed to the 48 volt battery warning.
By the way mikapen, I have E-ABC on my 2020 GLE450.
There is also a service bulletin covering that but I don't think OP faced any 48V battery issues but worth mentioning to the dealership to check the grounds nonetheless, thanks for bringing this up.
Here is the one shared by forum member konigstiger (please see attached)
Attached Files
File Type: pdf
LI54.10-P-069698.pdf (52.4 KB, 158 views)
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Old Sep 12, 2021 | 12:36 PM
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Originally Posted by mikapen
*****
The situation I inquired about, where the service department is asked by Mercedes to do research and open a case, is part of corporate troubleshooting and analyzing the situation in the field.
While that takes extra time, it's probably more likely to find a real solution then just throwing parts at it.
Sometimes the dealer gets a response same day and sometimes it may take a week or even more if it's a complex problem affecting different scenarios.
There is often an email exchange between the factory and dealers, getting feedback on potential solutions, that could be implemented everywhere. I believe that was the case with the painted over grounds, that occurred in early 2020 vehicles. In that case it also involved the body supply chain.
It's actually a pretty impressive solution.
In the old days, Dealerships would wait for the Regional Service Rep to arrive on his rounds. They'd save up the parts they replaced and the Rep would review the actions taken. In the next month, he would file his monthly report and this might open a case, during which the dealership probably wouldn't be reimbursed. This not only caused delays, but also made the Dealer reluctant to do anything proactive. In many cases, it boiled down to the relationship the Dealer Service Manager had with the Rep. (Rightly so, since there are Dealers who abuse the system and file fake warranty claims.)
I think this system is a real advancement, increasing the likelihood of a real fix.
But with new models and fast evolving electronics, it's inevitable (?) that there will be some unintended glitches. That's why I keep a Points and Condenser car in the fleet. I can fix it myself (probably).
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Old Sep 12, 2021 | 01:09 PM
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Originally Posted by W205C43PFL
There is also a service bulletin covering that but I don't think OP faced any 48V battery issues but worth mentioning to the dealership to check the grounds nonetheless, thanks for bringing this up.
Here is the one shared by forum member konigstiger (please see attached)
There has been quite a lot posted about 48 volt battery problems/issues, but you're right, OP has thankfully not experienced them. I brought up my experience re process, since it paralleled MIKAPEN's description of 'how things work' in the service department ... or are supposed to work. Thank you for mentioning (and including) the service bulletin re the 48v battery. I have it, but it can't hurt to expose the availability of these service bulletins.
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