marianbarabance

Good morning,

I have a Mercedes GLS 350 D 4MATIC
VIN: WDC1668241B224238

In the link below you can see all the errors that happen, and in the video(MB-GLS-Error.mp4) you will see I can't stop the car anymore:
https://drive.google.com/drive/folders/1M96StSAkT7uZNB698qXiKKavXc2ms0Yp?usp=sharing

I already went to the MB Dealer in Belgium to resolve the problem, but they couldn't find anything wrong.
They have seen the error, but don't know how to solve it. The error is not all the time, is ok to drive for 4-5 days, then for 2-3 days I have the errors and then again is OK.

Do you know someone in Europe that can solve the issue?

Thank you.

chassis

When were the main and auxiliary batteries last replaced?

marianbarabance

The car was 1st-time registered in March 2019.
I bought the car in May 2022. All the time I went only to Mercedes-Benz dealers for maintenance and now with these errors.

I don't know if the batteries were replaced before I bought the car(May 2022), I am sure since I own the car, and none of the batteries were replaced.

If you believe can be from the batteries I will change them next week.

Today I had again the errors(all the sensors are disabled and the car remains stuck in R) when I drove it on a bumpy road.

CaliBenzDriver

Yes there's a specialist named "DIAGNOSE DAN" in the Nederland. He fixes all the German cars no one knows how to deal with.


> MB: NOT ROCKET SCIENCE:
There is no question any local MB Dealer should be well able to fix that W166!
Every German cars are build with those Bosch + Siemens + Continental technologies to have exactly the same problems. Nothing Special Out Of The Ordinary.

Your issue sound like it is related to network disruption likely involving solderless EIS...
​
Let me review your submited material to provide more clues.

++++++ Review +++++

-- Ok I reviewed your material, good job gathering evidences.

-- This is not too bad. It should be easily repaired in 60 to 90 mn - No need to trade up for a Lexus.

-- QUIT DRIVING IT NOW though!!
Thankfully, It has not yet jumped in 1st gear at freeway speed or into "P" below 30MPh!

-- Engine not STOPPING: try inserting the physical KEY in IGNITION slot to turn On/OFF


Just a few of your computers on CANbus-B are in soft-crash mode: SCM + EIS + F-SAM.

Engine/Tranny/Brakes: are shielded by CANbus-C from this mess on a separate network.
ECU+TCU+ESP+ISM = OK!


- The extreme chaos you are experiencing is purposely engineered to happen from loose wiring connections.
- Modules that are supposed to work hand-in-hand are connected with a special solderfree technology.
- It almost works well in the showrooms but bumpy roads get everything loose quickly like a 5year old Volkswagen. Normally we get it at 10years unless Belgian cobblestones roads are involved


> THINGS TO CURE Various degrees :
What you have is a combination of issues, repairs are also a combination - Your pick:

- REBOOT : Disconnect all batteries 10mn (DO NOT touch leads together!)

- Float charge batteries replace if over 4.5Yrs

- Scan car to narrow down a short action list

- Resolder "SCM + EIS" Modules as a priority then "KeylessGo" to resume normal functions

- Stay away from bumpy roads or fix 4x DCU to sanitize your CANbus-B


> EXPECTATIONS:
Understand that one crazy module can disrupt a whole network with junk data....
This is where bumper radar modules are famous for preventing MB engine start.

The goal is to sanitize all modules currently acting up right now... (ISM Tranny gear selector module also packs a solderless surprise for later!)


Right now you are simply up for a few marginal modules. It looks nasty but is not really too bad. - Help yourself to more freebies through my signature.

Hope this help with your ownership.

chassis

MBs need nearly perfect batteries for the electrical system to perform normally. The batteries in your car can be 5-6 years old depending on build date. I would replace both of them - the main 12V battery under the front passenger seat, and the smaller auxiliary battery which can be in the luggage area or under the rear passenger seat, depending on option content. For a GLS I think the aux battery is in the right rear side trim area, in front of the taillamp and next to the spare tire area.

After the batteries are replaced, clear the codes and start from the beginning to see if any problems remain.

marianbarabance

Hi,
Thank you for the message.
Tomorrow I will replace the auxiliary battery, I looked last evening, and it was manufactured on 05.2018.

Of course, I tried to stop the car by removing the start/stop button and using the key, but still I couldn't stop the car. In the end after opening and closing the door more than 50 times, the car went into P mode.

I will contact the guy from the Netherlands to have a look and diagnose the car.

Marian

marianbarabance

Last evening the car again remains stuck in Reverse. I needed to keep the brakes pressed for more than 30 minutes.
I tried everything that I could think to stop the engine, but nothing worked. After 15-20 minutes I pressed SOS button and I was in touch with MB support from Belgium, Germany and none of them was able to help me with a solution.
I already was exhausted and stressed and somehow I kept the start/stop button pressed for more than 2 minutes and the engine stopped.

I really never thought something like this would happen. The car now is to another MB authorized dealer; I really hope they will fix it, because I will sell it immediately.
I don’t want to drive another Mercedes car in my life😱.

CaliBenzDriver

A lot of former MB owners share your conclusion. You'll find better implementation of German technologies under JP luxury brands.

​​​​

marianbarabance

Just received the car from the MB dealer, the same story: "We can't see anything wrong...."
I really think to ask a lawyer to go in court with MB, I don't believe is normal and safe to just ignore the errors and give the car back to drive as nothing is happening.

P.S. I am paying for each "have a look" at the car.

CaliBenzDriver

What you are experiencing is not a singular experience. Yet I dont think a lawyer can help get you car working sooner.

Only an honest MB specialist can apply fixes after troubleshooting issues I have already highlighted for you...


The dealers are not really enclined to deal with super disfunctional cars like your's proven

Your local dealer is doing its best to get you out this car to resale it to another lucky owner.

A quick car wash is an easier way for dealer to earn 5000Euro than fixing your troublesome car.

mcoady1

Mine has done this intermittently, but not enough for me to spend much time on. When I bought it the stealer said I needed a new SCM but I ignored and its been fine (I think they were trying to throw parts at blind spot monitor fault which ended up being the tiny light triangle on mirror that was shorted out).

If you find a solution please share. I will scan this module and see if there are any codes.

marianbarabance

Yes, I will keep updating this thread if I have any news.
I changed the auxiliary battery last Sunday, I used the car every day(~150 KM/day) and everything is working perfect.

I don't believe is resolved, I will see.

mrjetskey

Last year my wifes car while driving down freeway Aux batt. malfunction came on, Car downshifted into lower gear at freeway speeds. I pulled over at first mercedes dealer bought new auxillary batt. installed same with no more problems, that was over a year ago. what I didnt understand was old battery still tested at 12.2 volts. I don't know why it was bad, but it was over 5 yrs old.

marianbarabance

I drove now more than 1500KM in the last 2-3 weeks and everything is good.