Assistance features inoperative
Thread Starter
Newbie
Joined: Mar 2024
Posts: 6
Likes: 2
2023 E450
Assistance features inoperative
I have a 2023 E450 with the driver assistance package. Starting two weeks ago I started getting messages upon starting the car in the garage including "Active Steering Assist Inoperative", "Active Stop And Go Assist Inoperative, See Operator's Manual", "Active Lane Keep Assist Inoperative". If I try to turn these features on I get the message "Function Unavailable" and they can not be activated during the drive. However, if the car is parked outdoors for some period of time, upon restarting the car these functions will automatically be active. Sometimes when arriving home, with all these functions still active, upon putting the car in the garage one of the above listed messages instantly appears. Does anyone have any idea what might be causing this? Everything worked perfectly until this started. I might mention too that Live Traffic is very intermittent on this car as well, and "Hey Mercedes" very often results in "I'm sorry, I can't help you with that right now." I don't know if all this is somehow related, but it's all getting quite annoying. I suppose at some point I'll nee to get the car to a MB dealership to sort this out.
can be anything from bad, dirty sensors, cameras, and so on
only a proper diagnostics will tell
If you are not under warranty, you could get our service and safe upto 80% on repairs
if you are under warranty, who cares. just take it to the dealer
only a proper diagnostics will tell
If you are not under warranty, you could get our service and safe upto 80% on repairs
if you are under warranty, who cares. just take it to the dealer
MBWorld Fanatic!
Joined: May 2018
Posts: 3,048
Likes: 905
From: Long Island, NY
2019 E 450, 2016 E350 4matic (retired), 2018 Ford Edge Sport, 2008 Porsche Boxster
Why would you do otherwise?
FWIW, while driving this has happened to me as well. Usually withing 10 to 15 minutes it clears itself up. Other times, like you, it is not working, I make a stop, turn off the ignition and when I start the car everything is working fine.
Go figure!
FWIW, while driving this has happened to me as well. Usually withing 10 to 15 minutes it clears itself up. Other times, like you, it is not working, I make a stop, turn off the ignition and when I start the car everything is working fine.
Go figure!
Newbie
Joined: Nov 2024
Posts: 8
Likes: 3
I have a 2023 E450 with the driver assistance package. Starting two weeks ago I started getting messages upon starting the car in the garage including "Active Steering Assist Inoperative", "Active Stop And Go Assist Inoperative, See Operator's Manual", "Active Lane Keep Assist Inoperative". If I try to turn these features on I get the message "Function Unavailable" and they can not be activated during the drive. However, if the car is parked outdoors for some period of time, upon restarting the car these functions will automatically be active. Sometimes when arriving home, with all these functions still active, upon putting the car in the garage one of the above listed messages instantly appears. Does anyone have any idea what might be causing this? Everything worked perfectly until this started. I might mention too that Live Traffic is very intermittent on this car as well, and "Hey Mercedes" very often results in "I'm sorry, I can't help you with that right now." I don't know if all this is somehow related, but it's all getting quite annoying. I suppose at some point I'll nee to get the car to a MB dealership to sort this out.
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Thread Starter
Newbie
Joined: Mar 2024
Posts: 6
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2023 E450
Here today, gone tomorrow.
I made an appointment to get the problem checked out. The very next day the problem vanished and has not returned. The service manager said the problem could have been caused by any number of things, but if it comes back bring the car back in. It's been two weeks since it last occurred and the car has been driven daily without and issues, so perhaps it fixed itself..... who knows.
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Out Of Control!!
Joined: Apr 2019
Posts: 12,092
Likes: 6,868
From: Silicon Valley
W212 MY'14 M276-3.5NA @75kMi
built-in chaos included... no extra cost
I have a 2023 E450 with the driver assistance package. Starting two weeks ago I started getting messages upon starting the car in the garage including "Active Steering Assist Inoperative", "Active Stop And Go Assist Inoperative, See Operator's Manual", "Active Lane Keep Assist Inoperative". If I try to turn these features on I get the message "Function Unavailable" and they can not be activated during the drive. However, if the car is parked outdoors for some period of time, upon restarting the car these functions will automatically be active. Sometimes when arriving home, with all these functions still active, upon putting the car in the garage one of the above listed messages instantly appears. Does anyone have any idea what might be causing this? Everything worked perfectly until this started. I might mention too that Live Traffic is very intermittent on this car as well, and "Hey Mercedes" very often results in "I'm sorry, I can't help you with that right now." I don't know if all this is somehow related, but it's all getting quite annoying. I suppose at some point I'll nee to get the car to a MB dealership to sort this out.
The good news is there is a quick free fix: chassis REBOOT (*)
This is a mature problem MB has producef for over a decade. The poker face until warranty expires is can not reproduce!
This is caused by transient network disruptions. Whats involved is the combination of marginal voltage and poor connections. Under conditions high-speed modules disfunction sometimes earning an ECU/TCU "limp mode" in the fast lane.
+++ (*):
The bad news is :
-- long term fix involves reworking VIP solderless modules.
-- the free fix temporarily sanitize the CGW swamped by rogue modules.
-- I have this survey detailed under my signature plus here as $3 fix for free because you've paid enough.
-- THIS IS NOT ANY RANDOM MYSTERY! It purpose built electronics that already runs marginally under warranty.
Easily fixed though with NEW MODULES the way the business was designed to be run:
- ESP!,
- SCM!,
- EIS!,
- ISM!,
- SAM/CGW,
- MFK,
- AAC,
- DCU,
- ... (ECU/TCU: ok!)
Choices are: use the parts-canon or troubleshooting labor for less than $25k.
Last edited by CaliBenzDriver; Nov 21, 2024 at 05:21 PM.
Thread Starter
Newbie
Joined: Mar 2024
Posts: 6
Likes: 2
2023 E450
UPDATE:
After a period of no error messages following the service visit in November, the error messages returned. These messages appear every time I start the car and randomly as I'm driving, and its getting VERY annoying!! I took the car back in February and the technician reported that there were fault codes stored, (U042902) - implausible data were received from the steering column module. General signal fault U0429E1. The service manager said that they consulted with MB and were told to NOT replace the steering column module, that the fault codes in the driver assistance systems control unit are precautionary messages. He said that new coding parameters will be available second quarter for the HOSWD module and the new software will be installed when it's available.
Now the big question..... what are the chances that this will fix the problem??
After a period of no error messages following the service visit in November, the error messages returned. These messages appear every time I start the car and randomly as I'm driving, and its getting VERY annoying!! I took the car back in February and the technician reported that there were fault codes stored, (U042902) - implausible data were received from the steering column module. General signal fault U0429E1. The service manager said that they consulted with MB and were told to NOT replace the steering column module, that the fault codes in the driver assistance systems control unit are precautionary messages. He said that new coding parameters will be available second quarter for the HOSWD module and the new software will be installed when it's available.
Now the big question..... what are the chances that this will fix the problem??
Out Of Control!!
Joined: Apr 2019
Posts: 12,092
Likes: 6,868
From: Silicon Valley
W212 MY'14 M276-3.5NA @75kMi
STANDARD MB ISSUES
UPDATE:
After a period of no error messages following the service visit in November, the error messages returned. These messages appear every time I start the car and randomly as I'm driving, and its getting VERY annoying!! I took the car back in February and the technician reported that there were fault codes stored, (U042902) - implausible data were received from the steering column module. General signal fault U0429E1. The service manager said that they consulted with MB and were told to NOT replace the steering column module, that the fault codes in the driver assistance systems control unit are precautionary messages. He said that new coding parameters will be available second quarter for the HOSWD module and the new software will be installed when it's available.
Now the big question..... what are the chances that this will fix the problem??
After a period of no error messages following the service visit in November, the error messages returned. These messages appear every time I start the car and randomly as I'm driving, and its getting VERY annoying!! I took the car back in February and the technician reported that there were fault codes stored, (U042902) - implausible data were received from the steering column module. General signal fault U0429E1. The service manager said that they consulted with MB and were told to NOT replace the steering column module, that the fault codes in the driver assistance systems control unit are precautionary messages. He said that new coding parameters will be available second quarter for the HOSWD module and the new software will be installed when it's available.
Now the big question..... what are the chances that this will fix the problem??
This is just buying time to expire warranty coverage when expensive parts can start flying on your dime.
This refined CAN chaos is far from new. Poor networking is engineered from factory with solderless peripheral modules and unstable voltage swings.
The core modules are built with reliable connections, all CAN-B the opposite and in-between networks CGW benefits simple reboots.
Hope everything does stay well.
Last edited by CaliBenzDriver; Mar 21, 2025 at 04:18 PM.
Thread Starter
Newbie
Joined: Mar 2024
Posts: 6
Likes: 2
2023 E450
Took the car back to the dealership after literally hundreds of warning messages. Steering column module replaced, no improvement. Now waiting for a new steering wheel. What’s next after that??
MBWorld Fanatic!
Joined: May 2018
Posts: 3,048
Likes: 905
From: Long Island, NY
2019 E 450, 2016 E350 4matic (retired), 2018 Ford Edge Sport, 2008 Porsche Boxster
