E450 Indicator warning
Thread Starter
Newbie
Joined: Mar 2025
Posts: 5
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2021 E450
E450 Indicator warning
2021 E450 Sedan
Hi all, sometimes about once every 2 weeks I drive my car and the right turn indicator comes up with a warning, it tells me to check the rear indicator bulb.
When I go to the rear and check the indicators are working even with the warning, and flashing at the correct speed.
It shows on the dash flashing fast.
Has anyone encountered this?
Thanks
Hi all, sometimes about once every 2 weeks I drive my car and the right turn indicator comes up with a warning, it tells me to check the rear indicator bulb.
When I go to the rear and check the indicators are working even with the warning, and flashing at the correct speed.
It shows on the dash flashing fast.
Has anyone encountered this?
Thanks
MBWorld God!
Joined: Dec 2019
Posts: 32,681
Likes: 6,420
2021 E450 Sedan
Hi all, sometimes about once every 2 weeks I drive my car and the right turn indicator comes up with a warning, it tells me to check the rear indicator bulb.
When I go to the rear and check the indicators are working even with the warning, and flashing at the correct speed.
It shows on the dash flashing fast.
Has anyone encountered this?
Thanks
Hi all, sometimes about once every 2 weeks I drive my car and the right turn indicator comes up with a warning, it tells me to check the rear indicator bulb.
When I go to the rear and check the indicators are working even with the warning, and flashing at the correct speed.
It shows on the dash flashing fast.
Has anyone encountered this?
Thanks
Thread Starter
Newbie
Joined: Mar 2025
Posts: 5
Likes: 0
2021 E450
Thanks for the reply,
I was wondering if it might be a dry connection, I have been looking at specific scanners for the Mercedes as well as the star system, I had all the software for my BMW but Mercedes are new to me.
Seems everyone has a different view on scanners, do you have a preference for a bi directional scanner at the higher end over maybe 400-500 mark?
Thanks again
I was wondering if it might be a dry connection, I have been looking at specific scanners for the Mercedes as well as the star system, I had all the software for my BMW but Mercedes are new to me.
Seems everyone has a different view on scanners, do you have a preference for a bi directional scanner at the higher end over maybe 400-500 mark?
Thanks again
Super Member
Joined: Sep 2016
Posts: 770
Likes: 289
From: Los Angeles
2024 GLE63s, 2021 E63s, 2018 GLC43
About a year ago, I started getting error messages about right rear turn indicator light malfunction, even though when I looked all the indicator lights were working. Happened rarely, like once a month. It was only the right side. No error messages on my Autel scanner.
Then a month ago, it started happening to both sides, randomly only one side or the other, and more frequently, like every other time I drove the car. The car was at the dealer for a recall, and I asked them to update all the software and modules, they told me everything was already up to date. Also around this time, I noticed the car would give battery low/critical more often, whereas before it only popped up if I washed the car and cleaned the inside with the doors open and all the electronics not going to sleep.
So I changed out the battery and no more indicator light malfunction messages. The battery was disconnected from the car for a day, not sure if that reset something also that could have been causing the indicator light malfunction messages.
Then a month ago, it started happening to both sides, randomly only one side or the other, and more frequently, like every other time I drove the car. The car was at the dealer for a recall, and I asked them to update all the software and modules, they told me everything was already up to date. Also around this time, I noticed the car would give battery low/critical more often, whereas before it only popped up if I washed the car and cleaned the inside with the doors open and all the electronics not going to sleep.
So I changed out the battery and no more indicator light malfunction messages. The battery was disconnected from the car for a day, not sure if that reset something also that could have been causing the indicator light malfunction messages.
Last edited by taphil; May 12, 2025 at 11:45 AM.
Thread Starter
Newbie
Joined: Mar 2025
Posts: 5
Likes: 0
2021 E450
About a year ago, I started getting error messages about right rear turn indicator light malfunction, even though when I looked all the indicator lights were working. Happened rarely, like once a month. It was only the right side. No error messages on my Autel scanner.
Then a month ago, it started happening to both sides, randomly only one side or the other, and more frequently, like every other time I drove the car. The car was at the dealer for a recall, and I asked them to update all the software and modules, they told me everything was already up to date. Also around this time, I noticed the car would give battery low/critical more often, whereas before it only popped up if I washed the car and cleaned the inside with the doors open and all the electronics not going to sleep.
So I changed out the battery and no more indicator light malfunction messages. The battery was disconnected from the car for a day, not sure if that reset something also that could have been causing the indicator light malfunction messages.
Then a month ago, it started happening to both sides, randomly only one side or the other, and more frequently, like every other time I drove the car. The car was at the dealer for a recall, and I asked them to update all the software and modules, they told me everything was already up to date. Also around this time, I noticed the car would give battery low/critical more often, whereas before it only popped up if I washed the car and cleaned the inside with the doors open and all the electronics not going to sleep.
So I changed out the battery and no more indicator light malfunction messages. The battery was disconnected from the car for a day, not sure if that reset something also that could have been causing the indicator light malfunction messages.
Thanks again
Member
Joined: Dec 2023
Posts: 170
Likes: 49
2017 M-B E400 4Matic Wagon AMG-Line
Yes, you're lucky to get 3-4 years even from a high end battery on these newer cars.
Thread Starter
Newbie
Joined: Mar 2025
Posts: 5
Likes: 0
2021 E450
My main car (BMW, Merc) stay in the garage for most of the week on a tender as I work away Monday till Thursday and rarely drive it at weekends.
Guess it's just one of the draw backs I have to deal with
Thanks
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MBWorld God!
Joined: Dec 2019
Posts: 32,681
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Thanks for the reply,
I was wondering if it might be a dry connection, I have been looking at specific scanners for the Mercedes as well as the star system, I had all the software for my BMW but Mercedes are new to me.
Seems everyone has a different view on scanners, do you have a preference for a bi directional scanner at the higher end over maybe 400-500 mark?
Thanks again
I was wondering if it might be a dry connection, I have been looking at specific scanners for the Mercedes as well as the star system, I had all the software for my BMW but Mercedes are new to me.
Seems everyone has a different view on scanners, do you have a preference for a bi directional scanner at the higher end over maybe 400-500 mark?
Thanks again
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MBWorld God!
Joined: Dec 2019
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MB suggests you to charge the 12V battery (at least that is the type of message you get when battery level is at critical or low via email) by driving it for 45-60 minutes (preferably highway speeds).
MBWorld God!
Joined: Dec 2019
Posts: 32,681
Likes: 6,420
MBWorld God!
Joined: Dec 2019
Posts: 32,681
Likes: 6,420
About a year ago, I started getting error messages about right rear turn indicator light malfunction, even though when I looked all the indicator lights were working. Happened rarely, like once a month. It was only the right side. No error messages on my Autel scanner.
Then a month ago, it started happening to both sides, randomly only one side or the other, and more frequently, like every other time I drove the car. The car was at the dealer for a recall, and I asked them to update all the software and modules, they told me everything was already up to date. Also around this time, I noticed the car would give battery low/critical more often, whereas before it only popped up if I washed the car and cleaned the inside with the doors open and all the electronics not going to sleep.
So I changed out the battery and no more indicator light malfunction messages. The battery was disconnected from the car for a day, not sure if that reset something also that could have been causing the indicator light malfunction messages.
Then a month ago, it started happening to both sides, randomly only one side or the other, and more frequently, like every other time I drove the car. The car was at the dealer for a recall, and I asked them to update all the software and modules, they told me everything was already up to date. Also around this time, I noticed the car would give battery low/critical more often, whereas before it only popped up if I washed the car and cleaned the inside with the doors open and all the electronics not going to sleep.
So I changed out the battery and no more indicator light malfunction messages. The battery was disconnected from the car for a day, not sure if that reset something also that could have been causing the indicator light malfunction messages.
MBWorld God!
Joined: Dec 2019
Posts: 32,681
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Here is how to activate standby mode, you don't have to activate it, just view the amount of weeks you can place the vehicle in standby mode.
https://mbworld.org/forums/c63-c63s-...-function.html
https://www.mercedes-benz.ca/en/owne...xtended-period
https://mbworld.org/forums/c63-c63s-...-function.html
https://www.mercedes-benz.ca/en/owne...xtended-period
MBWorld God!
Joined: Dec 2019
Posts: 32,681
Likes: 6,420
Alternatively, you could check the 12V battery voltage via workshop menu: https://mbworld.org/forums/e-class-w...indicator.html
Please post the voltage here and forum members can then help determine if your battery is healthy.
Please post the voltage here and forum members can then help determine if your battery is healthy.
