E-Class (W212) 2010 - 2016: E 350, E 550
Sponsored by:
Sponsored by: CARiD

Electric Steering Wheel - Turns itself after engine start

Old Aug 2, 2022 | 02:06 PM
  #1  
nika_kirkitadze's Avatar
Thread Starter
Junior Member
 
Joined: Jan 2022
Posts: 36
Likes: 11
E350 4matic
Electric Steering Wheel - Turns itself after engine start

Hi everyone, from yesterday my car steering wheel behaves very odd

After starting engine steering wheel automatically turns left - on road also it pulls to left side whole car

it is easier to turn the steering wheel left then right, it is actually harder to turn right then left

Please advise if you have experience like this?

Demo Video:

https://drive.google.com/file/d/1xvo...w?usp=drivesdk


Here is also Xentry diagnosis results: https://drive.google.com/file/d/1j7_s3CS...sp=sharing

Last edited by nika_kirkitadze; Aug 2, 2022 at 03:41 PM.
Reply
Old Aug 2, 2022 | 02:41 PM
  #2  
CaliBenzDriver's Avatar
Out Of Control!!
Community Builder
Community Influencer
Liked
Community Favorite
 
Joined: Apr 2019
Posts: 11,921
Likes: 6,770
From: Silicon Valley
W212 MY'14 M276-3.5NA @75kMi
wild electric rack ... OMG 😳

I don't see anything related to STEERING on your Xentry screen capture... my stupid Samsung does not play Apple MOV files

it may be caused "oil in steering harness" as we've seen recently. Steering rack are subject to many recalls year after year. See if yous falls under a recall.

Scary wild ghosts steering the car

Last edited by CaliBenzDriver; Aug 2, 2022 at 03:04 PM.
Reply
Old Aug 2, 2022 | 03:34 PM
  #3  
nika_kirkitadze's Avatar
Thread Starter
Junior Member
 
Joined: Jan 2022
Posts: 36
Likes: 11
E350 4matic
Originally Posted by CaliBenzDriver
I don't see anything related to STEERING on your Xentry screen capture... my stupid Samsung does not play Apple MOV files

it may be caused "oil in steering harness" as we've seen recently. Steering rack are subject to many recalls year after year. See if yous falls under a recall.

Scary wild ghosts steering the car
Same exact feeling about ghosts while driving 😁😁

Will try to convert into .mp4

so regarding to oil do not understand where how or why until this is electric steering

thanks for your response 🙌🏼
Reply
Old Aug 2, 2022 | 03:38 PM
  #4  
CaliBenzDriver's Avatar
Out Of Control!!
Community Builder
Community Influencer
Liked
Community Favorite
 
Joined: Apr 2019
Posts: 11,921
Likes: 6,770
From: Silicon Valley
W212 MY'14 M276-3.5NA @75kMi
oil TO harness


electric rack

Rack module gets reset at every key cycle. See if you have any steering column faults (solderless pins)?
Reply
Old Aug 2, 2022 | 03:44 PM
  #5  
nika_kirkitadze's Avatar
Thread Starter
Junior Member
 
Joined: Jan 2022
Posts: 36
Likes: 11
E350 4matic
Originally Posted by CaliBenzDriver

electric rack

Rack module gets reset at every key cycle. See if you have any steering column faults (solderless pins)?
Oops I noticed some sort of oil near to engine - please tell me where is it located exactly?

please also check video I have updated it in post as well

https://drive.google.com/file/d/1xvo...w?usp=drivesdk
Reply
Old Aug 2, 2022 | 04:11 PM
  #6  
CaliBenzDriver's Avatar
Out Of Control!!
Community Builder
Community Influencer
Liked
Community Favorite
 
Joined: Apr 2019
Posts: 11,921
Likes: 6,770
From: Silicon Valley
W212 MY'14 M276-3.5NA @75kMi
self steering wilding at start

Originally Posted by nika_kirkitadze
Oops I noticed some sort of oil near to engine - please tell me where is it located exactly?

please also check video I have updated it in post as well

https://drive.google.com/file/d/1xvo...w?usp=drivesdk
Got your video: holy crap! It is possessed

Steering rack is located at the bottom of the engine compartment where it can collect engine leaks.

Many modules can instruct the steering to turn but not when starting up! Perhaps it is trying to initialize itself but has internal failure (see RECALL).

Scan the whole car to spot other disruptions that may help steering module get in the mood (Headlights LIN faults are not it) when coms are unavailable.

Can you connect to steering and read data or is the module off-line all together??
Reply
Old Aug 2, 2022 | 04:20 PM
  #7  
nika_kirkitadze's Avatar
Thread Starter
Junior Member
 
Joined: Jan 2022
Posts: 36
Likes: 11
E350 4matic
Originally Posted by CaliBenzDriver
Got your video: holy crap! It is possessed

Steering rack is located at the bottom of the engine compartment where it can collect engine leaks.

Many modules can instruct the steering to turn but not when starting up! Perhaps it is trying to initialize itself but has internal failure (see RECALL).

Scan the whole car to spot other disruptions that may help steering module get in the mood (Headlights LIN faults are not it) when coms are unavailable.

Can you connect to steering and read data or is the module off-line all together??
Gotcha, I looked at steering rack yesterday it was clean everything no oil drains or unplugged wires all was its place

I tried teach in process using xentry - after process it improved little bit but still this strange behavior

assuming I did teaching process wrong

there was instructions something like:

turn steering to center and start car with minimum 5 km/h

after 5 meters turn steering to left lock
then beyoend the limit - left

then tuen steering to right lock
then beyond the limit - right

also surface was not so flat, was little bit uphill

Please tell me what does it mean turn steering left or right lock?

also beyond the limit?
Reply
Old Aug 2, 2022 | 04:31 PM
  #8  
CaliBenzDriver's Avatar
Out Of Control!!
Community Builder
Community Influencer
Liked
Community Favorite
 
Joined: Apr 2019
Posts: 11,921
Likes: 6,770
From: Silicon Valley
W212 MY'14 M276-3.5NA @75kMi
I am no English major
I think "steering lock" in this context is a German translation that means all the way L or R till it stops.
Reply
MB World Stories

The Best of Mercedes & AMG

story-0

6 Mercedes Models That Did NOT Age Well (But Are Somehow Still Cool)

 Verdad Gallardo
story-1

Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun

 Verdad Gallardo
story-2

Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren

 Verdad Gallardo
story-3

8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine

 Verdad Gallardo
story-4

Flawlessly Restored Mercedes 190E Evo II Heads to Auction

 Verdad Gallardo
story-5

Electric Mercedes C-Class Unveiled: 11 Things You Need to Know

 Verdad Gallardo
story-6

Mercedes EQS Gets A Major Update: Everything You Need to Know

 Verdad Gallardo
story-7

5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve

 Verdad Gallardo
story-8

Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping

 Verdad Gallardo
story-9

10 Most Reliable Mercedes-Benz Models You Can Buy Used

 Verdad Gallardo
Old Aug 2, 2022 | 04:34 PM
  #9  
CaliBenzDriver's Avatar
Out Of Control!!
Community Builder
Community Influencer
Liked
Community Favorite
 
Joined: Apr 2019
Posts: 11,921
Likes: 6,770
From: Silicon Valley
W212 MY'14 M276-3.5NA @75kMi
VIN ... RECALL range

Provide your VIN so @konigstiger can kindly look up your recall eligibility.
Reply
Old Aug 3, 2022 | 02:23 AM
  #10  
nika_kirkitadze's Avatar
Thread Starter
Junior Member
 
Joined: Jan 2022
Posts: 36
Likes: 11
E350 4matic

This is actual values of steering wheel
Reply
Old Aug 3, 2022 | 03:09 AM
  #11  
S-Prihadi's Avatar
MBWorld Fanatic!
5 Year Member
Liked
Loved
Community Favorite
 
Joined: May 2018
Posts: 6,600
Likes: 6,543
From: Jakarta-Indonesia
2014 - W212.065 - E400 ( M276.820, 3 liter Turbo) RWD not Hybrid
Nika,

While on Xentry, center the steering wheel and note down the Degrees.
Next is to turn full LEFT and full RIGHT and note each side how many Degrees,
Tell us the value
Reply
Old Aug 3, 2022 | 05:12 AM
  #12  
nika_kirkitadze's Avatar
Thread Starter
Junior Member
 
Joined: Jan 2022
Posts: 36
Likes: 11
E350 4matic
Originally Posted by S-Prihadi
Nika,

While on Xentry, center the steering wheel and note down the Degrees.
Next is to turn full LEFT and full RIGHT and note each side how many Degrees,
Tell us the value
all the way left: 509.1 degrees
all the way right: 495.3 degrees
Reply
Old Aug 3, 2022 | 05:17 AM
  #13  
S-Prihadi's Avatar
MBWorld Fanatic!
5 Year Member
Liked
Loved
Community Favorite
 
Joined: May 2018
Posts: 6,600
Likes: 6,543
From: Jakarta-Indonesia
2014 - W212.065 - E400 ( M276.820, 3 liter Turbo) RWD not Hybrid
What is the Xentry center degree reading if physically steering at dead center ?

Reply
Old Aug 3, 2022 | 05:25 AM
  #14  
nika_kirkitadze's Avatar
Thread Starter
Junior Member
 
Joined: Jan 2022
Posts: 36
Likes: 11
E350 4matic
Originally Posted by S-Prihadi
What is the Xentry center degree reading if physically steering at dead center ?
sorry did not get this question what is dead center?
Reply
Old Aug 3, 2022 | 05:29 AM
  #15  
S-Prihadi's Avatar
MBWorld Fanatic!
5 Year Member
Liked
Loved
Community Favorite
 
Joined: May 2018
Posts: 6,600
Likes: 6,543
From: Jakarta-Indonesia
2014 - W212.065 - E400 ( M276.820, 3 liter Turbo) RWD not Hybrid
I mean, make your steering wheel as center/middle as possible, and then see what is Xentry reading.

https://www.carthrottle.com/post/wmo7e5r/

Reply
Old Aug 3, 2022 | 05:34 AM
  #16  
nika_kirkitadze's Avatar
Thread Starter
Junior Member
 
Joined: Jan 2022
Posts: 36
Likes: 11
E350 4matic
Originally Posted by S-Prihadi
I mean, make your steering wheel as center/middle as possible, and then see what is Xentry reading.

https://www.carthrottle.com/post/wmo7e5r/
I centered it and it was 0 [] -0.10 [] 0.10 values and then started taking turn to left then right
Reply
Old Aug 3, 2022 | 10:21 AM
  #17  
S-Prihadi's Avatar
MBWorld Fanatic!
5 Year Member
Liked
Loved
Community Favorite
 
Joined: May 2018
Posts: 6,600
Likes: 6,543
From: Jakarta-Indonesia
2014 - W212.065 - E400 ( M276.820, 3 liter Turbo) RWD not Hybrid
I suspect the Torque Sensor A91b1 could be the problem.
Too bad there is no Xentry test for it.

Try to disconnect it and test with engine running.

The connector to disconnect is below, I label A.




It is the same connector Cali label as 1, below




The Torque Sensor A91b1 itself is the green tick connector , but is deep inside the steering rack.



Attached all 6 documents related to EPS


The torque sensor A91b1 is the one which actually sense human steering effort and multiply it.
If say the torque sensor is out of specification and never goes to ZERO value, and instead is registering a bit LEFT value, it may do what it is doing ( whacky) now.






Example only
https://www.bosch-mobility-solutions...s%20to%20apply.



Example only


Happy troubleshooting.......

Attached Files
File Type: pdf
EPS , block diagram.pdf (371.0 KB, 262 views)
File Type: pdf
ESP, Function as of MY 2014.pdf (242.0 KB, 142 views)
File Type: pdf
ESP, Function up to MY 2014.pdf (233.8 KB, 148 views)
File Type: pdf
ESP, location of components.pdf (413.9 KB, 169 views)
File Type: pdf
ESP, wiring diagram.pdf (121.0 KB, 215 views)
Reply
Old Aug 3, 2022 | 12:31 PM
  #18  
nika_kirkitadze's Avatar
Thread Starter
Junior Member
 
Joined: Jan 2022
Posts: 36
Likes: 11
E350 4matic
Thank your for such a detailed suggestion, unfortunately for 2 weeks I am unable to do so I am in place where no garage or something like this - will try to find the way to detect it via diagnostic
Reply
Old Aug 4, 2022 | 07:43 AM
  #19  
nika_kirkitadze's Avatar
Thread Starter
Junior Member
 
Joined: Jan 2022
Posts: 36
Likes: 11
E350 4matic
Originally Posted by CaliBenzDriver

electric rack

Rack module gets reset at every key cycle. See if you have any steering column faults (solderless pins)?
Hello, today I noticed that first time when started driving when oil was cold steering wheel was working fine, no issues no pull to right - after 5-10-20 min strange behaviour aririved back - so I remember that you was talking about oil and please tell me more about it

How can I measure oil if it is good or where / how can I cahnge the oil for steering wheel?
Reply
Old Aug 4, 2022 | 11:45 AM
  #20  
CaliBenzDriver's Avatar
Out Of Control!!
Community Builder
Community Influencer
Liked
Community Favorite
 
Joined: Apr 2019
Posts: 11,921
Likes: 6,770
From: Silicon Valley
W212 MY'14 M276-3.5NA @75kMi
oil & steering 😊

Originally Posted by nika_kirkitadze
Hello, today I noticed that first time when started driving when oil was cold steering wheel was working fine, no issues no pull to right - after 5-10-20 min strange behaviour aririved back - so I remember that you was talking about oil and please tell me more about it

How can I measure oil if it is good or where / how can I cahnge the oil for steering wheel?
there is no steering oil used in electric steering racks. It's all operated by electricity and computers as described in selected docs kindly posted above in #17 to help you...


electric steering

The issue is when engine oil had a chance to leak into the steering harness... connections become questionable - Check if this has happened on your vehicle. Unplug steering connectors to check for oil sepage the way you would for oil in ECU harness.
Reply
Old Aug 4, 2022 | 11:54 AM
  #21  
nika_kirkitadze's Avatar
Thread Starter
Junior Member
 
Joined: Jan 2022
Posts: 36
Likes: 11
E350 4matic
Originally Posted by CaliBenzDriver
there is no steering oil used in electric steering racks. It's all operated by electricity and computers as described in selected docs kindly posted above in #17 to help you...


electric steering

The issue is when engine oil had a chance to leak into the steering harness... connections become questionable - Check if this has happened on your vehicle. Unplug steering connectors to check for oil sepage the way you would for oil in ECU harness.
Now I got the idea, thank you very much
Reply

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 

Thread Tools
Search this Thread
Rate This Thread
Rate This Thread:
You have already rated this thread Rating: Thread Rating: 0 votes,  average.


All times are GMT -4. The time now is 08:58 AM.

story-0
6 Mercedes Models That Did NOT Age Well (But Are Somehow Still Cool)

Slideshow: Not every Mercedes design becomes timeless, some feel stuck in the era they came from.

By Verdad Gallardo | 2026-05-12 18:09:07


VIEW MORE
story-1
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun

Slideshow: Yes, Mercedes built manual cars, and some of them are far more interesting than you'd expect.

By Verdad Gallardo | 2026-05-02 12:36:58


VIEW MORE
story-2
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren

Slideshow: A one-of-one U.S.-spec Mercedes-Benz SLR McLaren Roadster became even rarer after a factory-backed transformation at McLaren's headquarters.

By Verdad Gallardo | 2026-04-29 11:19:28


VIEW MORE
story-3
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine

Slideshow: Before curves took over, Mercedes mastered the art of the straight line, and some of those shapes still look right today.

By Verdad Gallardo | 2026-04-25 12:05:49


VIEW MORE
story-4
Flawlessly Restored Mercedes 190E Evo II Heads to Auction

Slideshow: The 190E Evolution II shows how a homologation necessity became a six-figure collector icon.

By Verdad Gallardo | 2026-04-22 17:53:47


VIEW MORE
story-5
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know

Slideshow: Mercedes is turning one of its core nameplates electric, and the details show just how serious this shift is.

By Verdad Gallardo | 2026-04-21 13:58:06


VIEW MORE
story-6
Mercedes EQS Gets A Major Update: Everything You Need to Know

Slideshow: Faster charging, longer range, and a controversial steer-by-wire system define the latest evolution of Mercedes-Benz EQS.

By Verdad Gallardo | 2026-04-15 10:35:34


VIEW MORE
story-7
5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve

Slideshow: These overlooked Mercedes-Benz models never got the spotlight, but they quietly delivered more than most remember.

By Verdad Gallardo | 2026-04-13 19:35:45


VIEW MORE
story-8
Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping

Slideshow: A well-used 1991 Mercedes-Benz 300D with more than one million miles is now looking for a new owner, and it still appears ready for more.

By Verdad Gallardo | 2026-04-10 10:05:15


VIEW MORE
story-9
10 Most Reliable Mercedes-Benz Models You Can Buy Used

Slideshow: From bulletproof sedans to surprisingly tough SUVs, these Mercedes models proved that the three-pointed star can go the distance.

By Verdad Gallardo | 2026-04-08 09:55:49


VIEW MORE