Johnny915

I recently noticed that in some cases when the car is just started, I cannot put the gearbox to D, it will automatically jump back to neutral. After I repeatedly tried to flick the gear lever several times, the car will start in D3 (I can clearly feel the frustration of gear shifting), and the automatic transmission will not be lower than third gear in the following driving. It seems to appear randomly, but due to my recent work that requires me to start and shut down the engine multiple times in a short period of time (leave the vehicle to go somewhere else), it usually appears at some point after that but will resume when I drive the next day normal. There is no error icon.

tmlourenco

How many miles do you have on it? The 9G tronic should do a service at 77.000miles or 5 years. If it's not time yet, maybe you need to see in the dealership if there is any update for your gearbox.

Johnny915

thx for the reply I got about 55k on it and I don’t really drive that much on this car this year(2021 yearly total is less than 500 miles). the check engine light comes out this evening. again. And disappeared after a 5min trip. strange🤔

Someone told me that the loss of the first and second gears may be due to a fault in the gearbox and triggered the protection mechanism. I will avoid going to the dealer because they are far away from my home and they are inefficient at work. If the situation worsens, I will probably seek the bodyshop for a diagnosis first.

W205C43PFL

Did you plug an OBD scanner in the vehicle and see if it stored any codes though?

ua549

You may need a software update. The transmission software on my '18 E300 was updated a couple of years ago under warranty.

ygmn

Maybe drive it a little more...

500 miles from Jan to Oct is 50ish miles a month or 12ish miles a week.
Not enough time for the tranny and engine to get warm...

But if say 4 long trips then the car sits too long between trips and moisture can condense inside engine and gearbox and rear end causing issue.

I am just throwing darts here... probably not issue... but really she needs to be driven a hair more.... to keep fit and not flat spot tires.

The whole reason for change oil every year or 10K miles.

Johnny915

that's a very good point... I did not use this car for too long (usually my friends come to pick me up lol), I should probably pay more attention to it.

Johnny915

What exactly is the update? Is it some kind of gearbox tuning?

Johnny915

Here's a quick update, I called a friend who works in a bodyshop. He said it seems like a transmission control module prob. The more serious situation he has seen is the complete loss of reverse gear (and also shift D but jump to N. after few attempts, the car will shift in D3. /this is the same problem I got). and...you should also check whether the transmission oil needs to be replaced.

I'm glad to know that this is probably not a problem with gear parts, cause this car has just passed the warranty. If the problem becomes serious, I'll consider replacing this part.

SamAak

[QUOTE=Johnny915;8439172]Here's a quick update, I called a friend who works in a bodyshop. He said it seems like a transmission control module prob. The more serious situation he has seen is the complete loss of reverse gear (and also shift D but jump to N. after few attempts, the car will shift in D3. /this is the same problem I got). and...

How much did it cost to get the TCM issue resolved?

Tailored

[QUOTE=SamAak;8660238]
valve body alone is $1050
regardless you would have to drain the oil to even get to it (cost of oil and new trans pan is around 4-500$) transmission oil change service
programming/labour
All in all a little over 2k for now

and that’s if you can reprogram your TCM that’s a big IF otherwise your buying a new tcm module because your gear selector module has a permanent fault and it will not communicate with each other

Haven’t looked up the price of a new Transmission control module yet but I hear it’s around 15-1600$

All this is based on personal experiences that I been through. Anyone have more info please do share.

MAJ613

I’m currently having the same issue on my car. Did you ever find out what is was?

mmorr

Hi

I have the same issue on a 2019 E220 with about 100k KMs - the amber engine light is on and MB dealer said "Transmission Control Pressure Implausible signal" and recommended replacing the Transmission Control Unit (Part No MA7252709011)

Does anyone know if replacing the control unit fixed the problem ?

Thanki

anton28

Any update on this? The same thing just happened to my 2018 E63 with 30k miles. Threw codes P073E00 and P07B700.

The car has a hard time going into drive - it just ends up in nuteral. Eventually, when it goes into drive, it takes off in third gear.

Googling code P073E00, the below refurbish services came up and bundled P073E00 and P07B700 codes together under the same problem that's part of the valve body. These guys offer a rebuild service for the valve body.

"Pressure sensor replacement Mercedes-Benz 9G-Tronic 725.0 - P07B700- P073E00"

https://maktrans.net/9GSENREP

Has anyone heard of this type of service? It could be an excellent alternative to replacing the entire valve body.......

S Naqvi

I am having the same problem with 2017 GLS. What was the final cost to repair this?

DoberdadinMD

Just had this problem with a 2018 GLS. The control unit (725-270-19-05-87) was $1,167.25 with a $105 core charge and with a new pan and fluid the parts total was $2,065.82 - which is a shame because the transmission service was just done in November, but they can't replace this without draining the fluid. Labor from a MB dealer was $1,382.60

S Naqvi

Just got this done... Did you feel a difference when driving?

DoberdadinMD

It's my wife's car and she says it is very smooth and better than she remembers it before the issue.

Was your cost similar?