turning off engine, shifting malfunctions - codes, EZS electronic ignition lock N73
Not too difficult to inspect
Watch below :
https://youtu.be/CQ-Lg3EPcNY
Good luck.....
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I would solder when and if I open up my N73 like you did.




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.
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
Mercedes Electronic Steering Lock ESL ELV Emulator Programming W204 W207 W212 ?




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
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.




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)
Mercedes Electronic Steering Lock ESL ELV Emulator Programming W204 W207 W212
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.
The Best of Mercedes & AMG
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.
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?




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.





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”





> 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.


