E-Class (W212) 2010 - 2016: E 350, E 550
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turning off engine, shifting malfunctions - codes, EZS electronic ignition lock N73

Old Mar 17, 2025 | 05:10 PM
  #26  
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Originally Posted by mbforE350
W205C43PFL , was that a one-time problem or did you have other problems and get repaired?
Sorry for the confusion, it was my mistake, I accidentally went to park when the vehicle was in motion at low speed. So it was user error.
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Old Mar 17, 2025 | 05:31 PM
  #27  
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Originally Posted by S-Prihadi
There is a common broken solder problem for EZS.
Not too difficult to inspect

Watch below :
https://youtu.be/CQ-Lg3EPcNY

Good luck.....



.




=============





=================





.













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Old Mar 18, 2025 | 02:30 AM
  #28  
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2014 - W212.065 - E400 ( M276.820, 3 liter Turbo) RWD not Hybrid
Did u solder these press-fit connectors? It would be good to do so. Cali has done his.
I would solder when and if I open up my N73 like you did.

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Old Mar 18, 2025 | 03:47 AM
  #29  
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cancelling chaos

including these also 👍
including these also 👍

Excellent electronics with enough defects so they can go bad.

You may realize after fixing the EIS that your tranny is shifting gears more appropriatly than stock, Yes?

if so then next step SCM: electronic steering module

Last edited by CaliBenzDriver; Mar 18, 2025 at 03:52 AM.
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Old Mar 18, 2025 | 06:42 AM
  #30  
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*uncomfortable with that* - what is it about those 3 spot-solders that indicates there is any problem, and how dare I heat that without frying the board. Would it be best to send it in to here, https://mbzexperts.com/merecdes-elec...HzxgBwR2MxuJBy Y Tech - Mercedes - Benz Electronic Ignition Switch Repair and Replacement.

My neighbor was riding with me yesterday so now I have a living witness. It performed well, 1. wouldn't turn off after driving 75 miles. After 150 miles upon return to home, 2. did the 3mph approaching to driveway in Drive gear to gremlin slamming into PARK shifting, then 3. the Reverse-Park-Drive-P-R-P-D-P-R-P-D shifting demonic possession. He's a Mercedes fan and I think it all did freak him out a bit. No interest in buying the car.

for the column module, do you mean this?, https://www.ebay.com/itm/17662753555...caAjd_EALw_wcB
Mercedes Electronic Steering Lock ESL ELV Emulator Programming W204 W207 W212
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Old Mar 18, 2025 | 07:06 AM
  #31  
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" if so then next step SCM: electronic steering module " = for the column module, do you mean this?, https://www.ebay.com/itm/17662753555...caAjd_EALw_wcB ?
Mercedes Electronic Steering Lock ESL ELV Emulator Programming W204 W207 W212 ?
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Old Mar 18, 2025 | 01:46 PM
  #32  
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Originally Posted by mbforE350
*uncomfortable with that* - what is it about those 3 spot-solders that indicates there is any problem, and how dare I heat that without frying the board. Would it be best to send it in to here, https://mbzexperts.com/merecdes-elec...HzxgBwR2MxuJBy Y Tech - Mercedes - Benz Electronic Ignition Switch Repair and Replacement.

My neighbor was riding with me yesterday so now I have a living witness. It performed well, 1. wouldn't turn off after driving 75 miles. After 150 miles upon return to home, 2. did the 3mph approaching to driveway in Drive gear to gremlin slamming into PARK shifting, then 3. the Reverse-Park-Drive-P-R-P-D-P-R-P-D shifting demonic possession. He's a Mercedes fan and I think it all did freak him out a bit. No interest in buying the car.

for the column module, do you mean this?, https://www.ebay.com/itm/17662753555...caAjd_EALw_wcB
Mercedes Electronic Steering Lock ESL ELV Emulator Programming W204 W207 W212
yes EIS!
That may be a really good option you found there for EIS issues. Give us a review afterwards if this met your expectations.


No solderless SCM is not related to failed ESL.
Separate issue. Don't worry about SCM if you can't solder electronics.
You'll cross that bridge when you get there.

Last edited by CaliBenzDriver; Mar 18, 2025 at 01:48 PM.
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Old Mar 18, 2025 | 02:29 PM
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Originally Posted by mbforE350
*uncomfortable with that* - what is it about those 3 spot-solders that indicates there is any problem, and how dare I heat that without frying the board.
On soldering the boards, several of us have soldered those board because of the non-soldered pins (https://mbworld.org/forums/e-class-w...s-modules.html ). In fact I soldered my rearSAM (with Cali's supervision), and I did not fried/melted anything.

I have the EIS soldering in my TODO list, waiting for some other electrical work for our ML (which its EIS will be soldered as well in due time)

for the column module, do you mean this?, https://www.ebay.com/itm/17662753555...caAjd_EALw_wcB
Mercedes Electronic Steering Lock ESL ELV Emulator Programming W204 W207 W212
If you recall my question on the noise down the steering column when inserting the key into the ignition, that is what that emulator is replacing. Since you have confirmed yours does not have it, such eumulator does not apply to your vehicle.

I think Cali is referring to the following



which Cali has already soldered and described in another post. I passed those details to another MB owner on another forum, who did it on its own (after the dealer's estimate shock) and he fixed a random transmission freeze.

Summary: soldering those innocent "wolf in lamb clothes" solderless pins is a common occurrence.

Last edited by JCM_MB; Mar 18, 2025 at 02:30 PM.
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Old Mar 18, 2025 | 02:36 PM
  #34  
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so maybe I should give a shot at soldering those 3 spots CaliBenzDriver circled, cautiously? I'd guess it would just be a light-tap re-heat of the existing solder.
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Old Mar 18, 2025 | 02:41 PM
  #35  
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and about the floor being wet, which I can't get a kleenex tissue to show a spot anywhere,
the "communication gateway" - (what I'd call wiring harness, same thing?), isn't in a trench/ below-floor-level channel, that would hold water, but the flooring could appear dry?
I'd think if the carpet was wet enough to cause moisture to cause electrical problems, there would also have to be some must-y wet smell going with it. None of that.
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Old Feb 11, 2026 | 02:57 PM
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S-Prihadi, CaliBenzDriver, I got by a whole year just by simply taking out the EIS, snapping it open and closed back up. Like it reseated all the connections. But now it's doing the same thing again with shifting from DRIVE or NEUTRAL, into PARK, as soon as my speed drops below 6mph. I'm going to send it to here : https://the-ecu-pro.com/
and they'll either repair or replace it. No coding / etc. on my part, they do it all and I should be able to pop it back in.
Question before I go into the dashboard again, this black hose and the white stick were in my way of getting out the EIS. I'd love to cut that hose out. Does it matter? And what does the white stick do?, in case it gets damaged and I provoke more chaos?



Attached Files
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Old Feb 11, 2026 | 03:01 PM
  #37  
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@CaliBenzDriver @S-Prihadi (had to add the "@"
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Old Feb 11, 2026 | 04:44 PM
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here's your picture...

where are the parts you want to cut up?

exhibit A
exhibit A

What faults codes are you looking to fix?
Just check it's not SCM or ISM before you repair EIS.

Last edited by CaliBenzDriver; Feb 11, 2026 at 04:47 PM.
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Old Feb 11, 2026 | 05:07 PM
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I just want to cut that hose that I pulled down, hanging out. It seems to run to a vent across the way and to the stereo. But as far as diagnostics and all that, I'm not going to the dealership and drop $2grand. Everything points to it being the EIS. see attached xentry bulletin. Totally what my car is doing, and it's a problem of the 2010 model. ECU Pro will cost me $350 to repair existing EIS, or $500 to replace with a new one. That's a better roll of the dice than what the dealership will bleed me for.
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Old Feb 11, 2026 | 05:32 PM
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Originally Posted by mbforE350
I just want to cut that hose that I pulled down, hanging out. It seems to run to a vent across the way and to the stereo. But as far as diagnostics and all that, I'm not going to the dealership and drop $2grand. Everything points to it being the EIS. see attached xentry bulletin. Totally what my car is doing, and it's a problem of the 2010 model. ECU Pro will cost me $350 to repair existing EIS, or $500 to replace with a new one. That's a better roll of the dice than what the dealership will bleed me for.
Thank you for this TSB,
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Old Feb 11, 2026 | 05:47 PM
  #41  
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is that new to you?
I'd be surprised if it is.
On an other MB group, I got this information, special to note, he said it was always the first year of the W212, which is mine, a 2010.Now that I know what's going on I can tell you that we've dealt with that a few times.

*It was always the first year of the W 212. That was back when they were still pretty new.

*Since it was a TRP, we always sent them to the dealer after diagnosing.

*There's a service bulletin for that. Bulletin LI54.25-P-056472.

We have 4 dealerships here in the Seattle area and they all

*require that the car is towed in, ID and proof of ownership before ordering the EIS, which is usually what it is.

*needs to be diagnosed to be sure.



“AI Overview

The first model year of the W212 Mercedes-Benz E350 was 2010. While it was introduced in 2009 for some international markets, it debuted in North America for the 2010 model year as a sedan”
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Old Mar 7, 2026 | 11:50 AM
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@CaliBenzDriver I want to cut out this area, is there any reason why I can't?
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Old Mar 7, 2026 | 12:28 PM
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shortcut dashboard chop?

This cutout may provide shortcut access to EZS but dashboard will look messed up every day there after... I can't say I'd rush doing that mod.


> TO SAVE YOUR TIME:
While around there, consider fixing BOTH EZS + SCM saves repeat work.

Last edited by CaliBenzDriver; Mar 7, 2026 at 12:49 PM.
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