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I have en eqs 450+ and recently been noticing the below error. Also i see Active Emergency stop assist not available and see operator manual. I tried to do a car wash as see if the dirt or fog removed but the eror went away but still shows up while parking. dealer said it is might be auto brake assist. Any one faced same and how did they resolve.
It sounds like you’re dealing with an issue related to the sensors or software governing the Active Emergency Stop Assist system. Possible causes for this error could include blocked sensors, software glitches, or even issues with the brake assist system itself. If the system detects that it can’t reliably monitor its environment—due to dirt, misalignment, or a sensor malfunction—it might disable the feature for safety reasons. Environmental factors, such as heavy rain or fog, can also affect sensor performance. I recommend running a full system scan to check for fault codes in the control modules related to this function. These codes can pinpoint the exact issue and guide your next steps. You can either take it to a dealer or, if you want to troubleshoot yourself, using a full system scanner will be essential. The youcanic full system scanner is great for diagnosing all vehicle systems, but make sure to use a scanner that can read every module; some cheaper tools might miss important codes.
Thanks for the reply. I would take it to a dealer for diagnosis. My dealer told it is covered under warranty and can the service would be free at Mb dealership ?
Hey, my x254 GLC 300 does the same thing. The dealership managed to fix it a couple of times, it went good for awhile but the problem came back on me again...
The first time it was a software update, didnt fix it.
2nd - more software, still didnt fix it...
3rd - change the main control unit. No fix.
4th - change steerling wheel, main control unit. Fix for a good 1 month+ but back again
5th - change steerling wheel, main control unit and a hand gesture control unit. Was good for a long time, 4 months?
Recently back again, every trip I do; I get the exact message. Usually after 3-4 consecutive 'unavailable' messages, it promotes to 'Active emergency inoperative'. Usually you won't get anymore errors after acknowledging the inoperative message.
Can you let me know what your dealership did to fix it?
This doesn't make sense, but make sure your tire pressures are well within the recommended range. For some reason, low tire pressure can trigger a bunch of these type of error messages, I've also found that dirt or water on the front camera seems to also do it.
Hey, my x254 GLC 300 does the same thing. The dealership managed to fix it a couple of times, it went good for awhile but the problem came back on me again...
The first time it was a software update, didnt fix it.
2nd - more software, still didnt fix it...
3rd - change the main control unit. No fix.
4th - change steerling wheel, main control unit. Fix for a good 1 month+ but back again
5th - change steerling wheel, main control unit and a hand gesture control unit. Was good for a long time, 4 months?
Recently back again, every trip I do; I get the exact message. Usually after 3-4 consecutive 'unavailable' messages, it promotes to 'Active emergency inoperative'. Usually you won't get anymore errors after acknowledging the inoperative message.
Can you let me know what your dealership did to fix it?
My EQS AMG had a similar issue after the service dept kept my car for about a week and changing out stuff the tech contacted a Mercedes engineer and was told to clean or replace a wheel speed sensor and my car has not had any issues for almost a year "knock on wood". The sensors controls everything from adaptive cruise, rear steering, and braking I think.
Thanks for the info! Hopefully that fixes my problem, I'll let them know on my first service, which is in 2 months time. Not gonna do it now because I have been in and out of the car dealership for the entire year... Gonna take a break for a bit haha.
2024 GLC 300, i just watched as my car went off to the dealer on the back of a recovery vehicle, this is the 4th sensor related issue i have had since i purchased it in October 2024.
I had the same issues as many other users on a different forum.. This is my third Mercedes and the first to give me any issues that weren't wear and tear related. the sensor warnings this time were: Occupant presence reminder inoperative, risk of rolling away position P not selected, active emergency stop and assist currently not available, active break assist currently limited active blind spot inoperative, service required do not change transmission position. Very disappointed with everything so far, love the vehicle but loath the reliability and the uncertainty that i have in the back of my mind now, coupled with the apprehension of driving anywhere other than local. Fingers crossed it is resolved properly this time and good luck to all above who have had their own share of issues.
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