2021 E350: Check rear right turn signal error?
Thread Starter
Member
Joined: Jan 2018
Posts: 129
Likes: 41
From: Florida
2017 SL550 (R231), 2021 E350 (W213)
2021 E350: Check rear right turn signal error?
My 2021 E350 has started showing a message on the dash to check the rear right turn signal. When the signal is on, I get the message and the click sound is faster. Outside the car, all is well. All blinkers work exactly correctly. I expect the current monitor for the light is a little too sensitive. It happened a month ago and went away the next drive. This time the error seems to be sticking around.
Is there a software update or something to fix this fault? I hate to take it to the deal for something so trivial. I've had the car for about 3 months and have a CPO warranty.
Is there a software update or something to fix this fault? I hate to take it to the deal for something so trivial. I've had the car for about 3 months and have a CPO warranty.
Junior Member
Joined: Oct 2016
Posts: 28
Likes: 6
W213
Happened to me on my 6 months old car, had the exact same symptoms.
Brought it in the first time to the dealer and was fixed for about a week. Brought it in again and they did a throughout check on the harnesses, nonetheless they decided to change the tail light assembly.. Fault went away after the 2nd time i brought it in.
They had to order it and was changed during my Service A.
Brought it in the first time to the dealer and was fixed for about a week. Brought it in again and they did a throughout check on the harnesses, nonetheless they decided to change the tail light assembly.. Fault went away after the 2nd time i brought it in.
They had to order it and was changed during my Service A.
Thread Starter
Member
Joined: Jan 2018
Posts: 129
Likes: 41
From: Florida
2017 SL550 (R231), 2021 E350 (W213)
Following up, the car went in for A service and MB replaced the problematic light under warrantee with no fuss. MB also updated the software on the surround cameras as they cut out once in a while. Kudos to Mercedes of Jacksonville for handling these items pleasantly. Time will tell if the issues are truly fixed, I'm optimistic!
Junior Member
Joined: Oct 2020
Posts: 22
Likes: 3
2021 E350
Same thing happened to me, i opened the felt compartment where the light is, just moved the wire to the bulb a bit and made sure the rubber grommet was in place securely where it connects to the rear light housing, since then havent seen the error. I think its because the wire is so close to the actual felt covering and if you put something in the compartment in the trunk that touches the felt it could move the wire a bit and trip the error. I also just duct taped the wire to the frame so it wouldnt rest directly on the lining, put back the cover and since then no error. Also note this was when the warning to check the right rear bulb and the actual turn signal was functioning properly when i checked the turn signal outside of the care.. Assume if the turn signal was not functioning outside the car, the above fix would not work.
Last edited by DKNYC; Jul 27, 2024 at 02:28 PM.
Newbie
Joined: Aug 2019
Posts: 5
Likes: 5
W213
Same thing happened to me, i opened the felt compartment where the light is, just moved the wire to the bulb a bit and made sure the rubber grommet was in place securely where it connects to the rear light housing, since then havent seen the error. I think its because the wire is so close to the actual felt covering and if you put something in the compartment in the trunk that touches the felt it could move the wire a bit and trip the error. I also just duct taped the wire to the frame so it wouldnt rest directly on the lining, put back the cover and since then no error. Also note this was when the warning to check the right rear bulb and the actual turn signal was functioning properly when i checked the turn signal outside of the care.. Assume if the turn signal was not functioning outside the car, the above fix would not work.
Junior Member
Joined: Oct 2020
Posts: 22
Likes: 3
2021 E350
how long has it been going on, mine went away after a week or so, i believe the system resets itself every so often, if you made sure the harness was secure and the wire was not moving around, after 2 weeks or so bring it to the dealer. Is the bulb actually out btw and does the turn signal outside the car function normally?
Trending Topics
Newbie
Joined: Aug 2019
Posts: 5
Likes: 5
W213
how long has it been going on, mine went away after a week or so, i believe the system resets itself every so often, if you made sure the harness was secure and the wire was not moving around, after 2 weeks or so bring it to the dealer. Is the bulb actually out btw and does the turn signal outside the car function normally?
MB World Stories
The Best of Mercedes & AMG
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun
Verdad Gallardo
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Verdad Gallardo
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine
Verdad Gallardo
Flawlessly Restored Mercedes 190E Evo II Heads to Auction
Verdad Gallardo
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know
Verdad Gallardo
Mercedes EQS Gets A Major Update: Everything You Need to Know
Verdad Gallardo
5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve
Verdad Gallardo
Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping
Verdad Gallardo
10 Most Reliable Mercedes-Benz Models You Can Buy Used
Verdad Gallardo
Junior Member
Joined: Oct 2020
Posts: 22
Likes: 3
2021 E350
See if it goes away after a week or so, if you dont see an issue with harness or grommet and bulb turn signal operates normally outside the car, once system resets should clear. If it doesn't have dealer look at it. Only other thing would be if water got in the rear tail light, you would see condensation or a Crack though. Give it a week or so and if still there make appointment.
Junior Member
Joined: Oct 2020
Posts: 22
Likes: 3
2021 E350
Just an FYI, i havent seen the error for a number of weeks now and just getting back from europe have no time to bring to dealer, have too much going on with life and work. If i see it come up again will bring it to dealer but since its been over a month or so not even on my radar anymore. That being said i will have them look at it during my next scheduled service in January 2025. Will update here on the outcomes.
Junior Member
Joined: Oct 2020
Posts: 22
Likes: 3
2021 E350
Ok so happened again and had some time and brought it to the dealer today, they said car needs a software update something wrong with the software talking from the right and left side of the car. Its not an over the air update either, so leaving the car there until later this afternoon. My car is still under warranty so its covered, but even if it wasn't something like this where its a software problem should be taken care of by the dealer. I'll let you know the results and if i see the error again. BTW typo on the miles, mine has 7500 miles, so thats why still under warranty. Again however if its software even if its post 4years / 50,000 miles i think it should be covered for others out there who may have this issue.
Last edited by DKNYC; Sep 19, 2024 at 12:34 PM. Reason: additional correction
MBWorld Fanatic!
Joined: Aug 2014
Posts: 1,912
Likes: 667
From: Tennessee
W214 E450
Ok so happened again and had some time and brought it to the dealer today, they said car needs a software update something wrong with the software talking from the right and left side of the car. Its not an over the air update either, so leaving the car there until later this afternoon. My car is still under warranty so its covered, but even if it wasn't something like this where its a software problem should be taken care of by the dealer. I'll let you know the results and if i see the error again. BTW typo on the miles, mine has 7500 miles, so thats why still under warranty. Again however if its software even if its post 4years / 50,000 miles i think it should be covered for others out there who may have this issue.
Last edited by L1Wolf; Sep 19, 2024 at 11:34 PM.
Junior Member
Joined: Oct 2020
Posts: 22
Likes: 3
2021 E350
good point it could be the easiest way out, hey its a software issue, though they did spent 2 hours though looking at the bulb and harness and diagnosing; so for this one where the right turn signal was actually functioning normally other than the warning, it does make some sense it related to software, also they told me 5 other e350/e450s from 2021 to 2023 reported the same issue and resolved from the update. Will update you guy on here after i pick up the car tmw and how things progress over the next few months if i see it again.
