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I have been lurking the forums and old posts and cannot find the solution I need…please help or tell me if I am correct in my assumptions.
I have a 2014 e350 w212 7-speed that I bought about 6 months ago. Today, while leaving the driveway I placed the car in reverse, reversed fine….went to place the car in drive and it wouldn’t move out of reverse. Tried getting car into park and it would not enter park or shift out of reverse at all. I opened the driver door and the vehicle immediately entered park and has not left park since.
Car starts perfect, everything seems to run, it will not switch out of park. Is currently blocking the alley behind my house.
The code I have displayed on the scanner is a p2610, no CEL or anything is illuminated…
I have checked fuses relating to the automatic transmission and stop-start system. Fuse #88 was bad and replaced, no effect on the rest of the problem, did not allow the code to be cleared. I have had the main battery and auxillary battery in trunk tested and are good.
everything online points me to a bad ecm or pcm. Any further tests or repairs/replacements I can try before going that route? Is expensive it looks like.
idk if maybe the car had a bad gear switch and just doesn’t want to move or what.
someone please help me, feel like I have tried all the troubleshooting I can find to try.
Mine has done that occasionally, pending to fix it.
Here is what I do:
1 - turn engine off
2 - key out of the ignition
3 - even within the car, press the lock button in your key fob TWICE
4 - wait for the computer to shut down ->> cluster lights go OFF
5 - wait a minute
6 - key ON, start the car
It has worked every time. Never got out of the car
After scanning, I get 4 errors
- shifter
- back up camera
- forgot the other ones
this issue does NOT require a bad ECU condition!
The burnt fuse is an oddity to investigate as cause of P2610?
> GET CAR MOVING AGAIN:
do a simple car reboot by disconnecting both batteries for 15mn. This should resume normal functions.
You said batteries are good... do yourself a favor measure the voltage right now.
Driver door does shift into Parking 👍
Issue seems more with your shifter/SCM than with Tranny/ISM, both of them do have limited reliability.
What's your current mileage?
current mileage is ~142k
main battery tests 12.84 vehicle off, 14.20 running.
aux battery in trunk tests 12.8 vehicle off, 13.20 running.
Have done two reboots so far, did a 3rd just now so it’s all sitting disconnected.
Everything I read people are able to disconnect their batteries, clear the code, drive away. I have no function of the transmission and no check engine light. My mom has been looking on The Google and thinks it’s a brake light sensor…
probably important to add: I have no previous knowledge with Mercedes’ prior to this car, I do not have any MB-specific scan tools or anything. My understanding of the cars transmission situation is that I cannot move this car from where it is unless both sets of wheels are lifted up and dollied to where it needs to get, can’t drag it up onto a flatbed in park.
The battery department is clear for working voltage.
Rebooting is not bringing back shifting abilities... ouch!
Let's try this: insert key directly in the ignition (bypass keyless) It start well so EIS is satisfied.
try gently taping the plastic casing between steering wheel and dash... that the home of SCM that transmits your shift lever position over CAN to transmission ISM.
I know nothing about P2610 and possible interactions with shifter controls.
SCANNER
Go in modules to read interactions while shifting - This should help you understand where shift commands are lost.
current mileage is ~142k
main battery tests 12.84 vehicle off, 14.20 running.
aux battery in trunk tests 12.8 vehicle off, 13.20 running.
Have done two reboots so far, did a 3rd just now so it’s all sitting disconnected.
Everything I read people are able to disconnect their batteries, clear the code, drive away. I have no function of the transmission and no check engine light. My mom has been looking on The Google and thinks it’s a brake light sensor…
probably important to add: I have no previous knowledge with Mercedes’ prior to this car, I do not have any MB-specific scan tools or anything. My understanding of the cars transmission situation is that I cannot move this car from where it is unless both sets of wheels are lifted up and dollied to where it needs to get, can’t drag it up onto a flatbed in park.
The oreilly scan tool I used >_>
Yes, your mom is always right:
it could be the brake switch circuit.
Simply, use your scanner to confirm live brake pedal signal from within the SAM Modules.
Seeing normally working Tail brake lights may not be conclusive because of multiple brake pedal circuits... only trust scanner status.
🤞
Last edited by CaliBenzDriver; Jun 17, 2023 at 06:26 PM.
Yes, your mom is always right:
it could be the brake switch circuit.
Simply, use your scanner to confirm live brake pedal signal from within the SAM Modules.
Seeing normally working Tail brake lights may not be conclusive because of multiple brake pedal circuits... only trust scanner status.
🤞
My scanner I have access to right this moment does not have the ability to read abs codes for this car. Maybe oreillys will in the morning when they open up again.
for now, I changed the brake light switch/sensor and the abs and traction lights that I did not have before, now illuminated. The presafe warning popped on my display now too.
battery in front reading at 14.20 running, battery in trunk reading at 13.08 running.
auto start/stop (eco mode) does not engage and did not start on when the car was started. Chasing down more fuses now.
I am afraid some high current may have damaged something. The transmission system has multiple parts, the servo box seems to be working since open door sensor was able to activate the Park setting.
So, can it be the shifter not sending the signal from the steering control module to the servo? The shifter control board is solderless @CaliBenzDriver what do you think?
Also, check fuse 33 in front fuse box under the hood near the windshield driver side. Fuse 91 perhaps near 88
It would be great if you can scan the vehicle using a MB specific scanner.
I am afraid some high current may have damaged something. The transmission system has multiple parts, the servo box seems to be working since open door sensor was able to activate the Park setting.
So, can it be the shifter not sending the signal from the steering control module to the servo? The shifter control board is solderless @CaliBenzDriver what do you think?
Also, check fuse 33 in front fuse box under the hood near the windshield driver side. Fuse 91 perhaps near 88
It would be great if you can scan the vehicle using a MB specific scanner.
This is starting to clearly point at the gear selector module mounted on the tranny side!
It's using the amazing pins for the input connector and for inductive load of actuator motors ...
On the up side it's built with a emergency backup actuator to let the main chaos play out more gracefully.... You know the message: "Do not shift, drive to shop...".
> Fused protection... :
This module even blew a fuse, it's toast.... I'll be darn - How long is the new one going to last before repeat?
Root: is a "poor GND" involved into channeling high currents into this system??
Last edited by CaliBenzDriver; Jun 18, 2023 at 01:19 PM.
This video is right on the money for troubleshooting steps until it stops at CAN-Distribution instead of dealing with ISM tranny actuator.
ISM System diagram:
SAM Fuse 12V Power
Painted post GND
CAN-C data
CAN-C bus bar
Personally I can't believe these "60.Ohms bus bars" would go bad unless swamped due to amazing location in footwell.
They use connector pins normally soldered and a single 60 Ohm surface mounted resistor. Ultra cheap and simple... good!
Solderless SCM ... connect to ECU CAN-C !
This diagram helps explain how steering module rework makes the ECU/TCU work much faster than solderless retransmit chaos.
Knowing how SCM chaos plays out without any fault lets me scrutinize common message we do get out of the blue while driving... (beep-beep: "XYZ Unavailable" warnings)
So I took the Mercedes to a local independent Mercedes shop 06/19/23, they were unable to fix the issue. The vehicle is now on a flatbed on its way to Mercedes Dealership as it should have been from the start I suppose.
The local guy wanted $1800 for his time/parts/etc to get to basically the same diagnosis we were at before. I will post his results below as well. I am curious, am I an ******* for not wanting to pay that? I feel like I waited 6 weeks and now have to pay to have him tell me what I told him. I’ll post a picture of the service as well. Going to have at least another $2000 at Mercedes dealership too no doubt.
Apparently he had bought a used part to replace with the busted one after telling me he was ordering a new part direct from Mercedes. That part is still attached to the car now. He told me after that he was never able to order a brand new direct select motor from Mercedes to begin with and he knew it from the start due to the electronic shifter having some Elon musk right to repair red tape.
What a mess to get this thing towed. First truck had to lift the front with his forks and prop the back with his dolleys to get it to the independent shop. Taking it from the independent shop the mechanic was able to put the transmission into neutral by starting a diagnostic cycle(?)
The current flatbed driver and I are hoping the Mercedes techs can get it off the flatbed.
Shop invoice points to a faulty N80+SCM not cooperating with the bad ISM.
I believe they both can become marginal along with EIS for a perfect trio.
It's expected that when ISM is exchanged SCM is going to notice. It doesn't mean your SCM is totally defective
> PRACTICALLY:
I would fix the first problem then evaluate what faults remain instead of bundling everything. Its easy to get overwhelmed when everything starts acting up at once... these are close guarded security parts for licensed professionals. Parts need to coded before they can work in your car.
Post live list of faults we can help you prioritize.
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