Turn signals randomly quit working - Yikes!
02-03-2019, 09:58 AM
#27
Senior Member
I have a 2014 E550 and have the same problem. Get the errors for blind spot and random failure of the turn signal (hazards work however). Dealer says not sure what is wrong, cleared the errors for blind spot assist inoperative and turn signal combination switch and sent me on my way home (I refuted paying the diagnostic fee because no repair was made). I did mention this post and the fix by replacing the switch but they didn’t want to hear it. Is there any way I can convince the dealer to repair as per bill above or need to talk to MBUSA? In the post above, dealer was lucky it happened on the test drive. Really think there would be a TSB for this. Unbelievable especially since related to safety.
Last edited by MercFiveHundred; 02-03-2019 at 10:02 AM.
04-23-2019, 10:30 PM
#28
Super Member
I'm having this issue on a 2013 GL, sometimes even the gear selection lever doesn't work. Power cycle with door open/close tends to clear it, but still dangerous, especially if you don't realize there is an issue with the indicators and take off.
Going to replace the Multi-Function Switch since it seems to have helped others here, doesn't seem like a SAM issue. I looked at it with Xentry, there was some obscure code, but no clear indicator of "this thing is bad"
Going to replace the Multi-Function Switch since it seems to have helped others here, doesn't seem like a SAM issue. I looked at it with Xentry, there was some obscure code, but no clear indicator of "this thing is bad"
12-07-2019, 12:03 AM
#30
Changing auxiliary battery worked for me
I have a 2014 E550 and have the same problem. Get the errors for blind spot and random failure of the turn signal (hazards work however). Dealer says not sure what is wrong, cleared the errors for blind spot assist inoperative and turn signal combination switch and sent me on my way home (I refuted paying the diagnostic fee because no repair was made). I did mention this post and the fix by replacing the switch but they didn’t want to hear it. Is there any way I can convince the dealer to repair as per bill above or need to talk to MBUSA? In the post above, dealer was lucky it happened on the test drive. Really think there would be a TSB for this. Unbelievable especially since related to safety.
On my 2012 Bluetec, I got the same "Blind Spot Assist Inoperative" message, and the turn signals weren't working too. Came to the forum here, searched for "Blind Spot Sensor" problems and read that other electrical systems acted up as well. I figured that since I hadn't changed my auxiliary battery since I bought the car new 7.5 years ago (I had changed the main battery about 3 years ago), I'd start with changing the auxiliary battery. Got myself a Duracell 12V 1.3Ah SLA battery from the local Batteries Plus store. Was a 30-45 minute job to install the battery - thanks to the info on the forum here - and what do you know; the Blind Spot Assist Inoperative message disappeared and the turn signals work
. A day later and no problems with the BSA and the turn signals. Fingers crossed. Hope the steering control module fails on me much later...or never.
07-30-2020, 12:34 AM
#31
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2012 ML350 4Matic
Turn Signal won't work
Bought a 2012 ML350 Bluetec (60k miles) for the GF to drive. Great car, love the torque and economy but there is a big problem. Sometimes immediately and sometimes after 5-10 miles, the turn signals completely stop working. Dangerous to say the least. I thought it might be related to the blind spot assist, so I turned that off but the problem persists. I've looked for answers on the forums and although at least one other person had the same issue, there was no solution presented. Is this issue really that rare?
07-30-2020, 12:57 AM
#32
Super Member
did you find any solution to this error. I am tired of this error already spent so much money on it and my local garage said it would be 2200 to change the steering module column. I don't know much about cars. I do know that problem is not that big to change the entire steering module column.
06-09-2021, 02:52 PM
#33
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2012 ML350 Bluetec
Hello HPinfo, I have the exact same problem on 2012 ML350 Bluetec. My indicator stops working. I have to turn the keys on & off & everything works normal for some time & then repeats. Can you please share the part number and how exactly you replaced the part. I guess you had mentioned somewhere on youtube... I will really appreciate that. Also after the replacement, did the problem recur ? Thanks, Jeevan
06-25-2021, 09:19 AM
#34
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2012 ML350 Bluetec
Hi Hpinfo, I have a similar issue. I have purchased a used combination switch replacement assembly. I have not installed yet, but could you please confirm if that needed some dealer reprogramming ? I have a iCARSOFT scanner. Will that suffice ? Appreciate response please. Thanks
06-25-2021, 09:31 AM
#35
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2012 ML350 Bluetec
Hi jrsmith, As mentioned by other, the indicator stops working after a short while, but the hazard warning works. I have ordered a combination switch module and planning to replace. Will this need some reprogramming of iCARSOFT MB II scanner will do the job? also will this not solve the problem as you have mentioned Front SAM replacement might be needed ? will this also need reprogramming and will CARSOFT MB II perform this? Thanks
07-31-2022, 07:10 PM
#38
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ML 350
I am experiencing similar issues with my ML350 2012 4MATIC. I guess I ll lodge a complaint as a vehicle worth 57K without collision that I have driven for more than 8 years shouldn’t develop random problems that I have to pay for. It’s frustrating because I am looking in the order of >2K too have it repaired. That is a guesstimate since no one has actually diagnosed the problem itself. Any comments. Sorry, late to the forum but just found some time now since Covid slow down.
01-14-2023, 04:29 PM
#39
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ML350
2014 ML350 Turn signals randomly intermittently combine with other problems
I bought this 14' ML350 when it was 4xxxx miles in 2019 from a local dealer. The first month of driving, I realized the turn signal working intermittently. it is very danger when changing lane. Also the other problems such one side (either to the left or right) the head and tail lights do not shoot off automatically when parking (it happened once a while). And sometimes I start the car the front wipers always wipe 1 complete turn (up and down) then stop. no mater sun shine or rainy day (The wiper was setted at off before start). the ML350 is having less power than the 2000 and 2001 ML320 I ever owned some number of years ago.
I also owned a 2002 MB C240 also had issue with no turn off head and tail lights at one side. That means the problem was with MB at least from 2002 to 2014 to my experience.
I read menkantor's posts:
I'm having this issue on a 2013 GL, sometimes even the gear selection lever doesn't work. Power cycle with door open/close tends to clear it, but still dangerous, especially if you don't realize there is an issue with the indicators and take off.
Going to replace the Multi-Function Switch since it seems to have helped others here, doesn't seem like a SAM issue. I looked at it with Xentry, there was some obscure code, but no clear indicator of "this thing is bad"
Also menkantor mentioned in his other posts he replaced the multi-Function Switch once and he also said he going to replace it again... He also said it is the problem with software I think he was right, that is the problem from programing, because menkantor replaced the MFS once and it was okayed for a while and the problem was back.
I think MB should look back at their software and should recall to keep their cars safe.
Thank you menkantor and all people in this forums for all information you posted here.
I also owned a 2002 MB C240 also had issue with no turn off head and tail lights at one side. That means the problem was with MB at least from 2002 to 2014 to my experience.
I read menkantor's posts:
I'm having this issue on a 2013 GL, sometimes even the gear selection lever doesn't work. Power cycle with door open/close tends to clear it, but still dangerous, especially if you don't realize there is an issue with the indicators and take off.
Going to replace the Multi-Function Switch since it seems to have helped others here, doesn't seem like a SAM issue. I looked at it with Xentry, there was some obscure code, but no clear indicator of "this thing is bad"
Also menkantor mentioned in his other posts he replaced the multi-Function Switch once and he also said he going to replace it again... He also said it is the problem with software I think he was right, that is the problem from programing, because menkantor replaced the MFS once and it was okayed for a while and the problem was back.
I think MB should look back at their software and should recall to keep their cars safe.
Thank you menkantor and all people in this forums for all information you posted here.
