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Old 10-13-2018, 02:13 PM   #1
Aqua Puttana
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Default 7 Speed Transmission (4 cylinder) Fluid Change

A quick search didn't show any Write-up.

Apparently the 2.143 liter OM-651 4 cylinder (inline) 2 stage turbocharged engine with the 7G-Tronic 7 speed transmission fluid change is a bit more complex than the V6 NAG1 5 speed. Typical drain and fill methods may not work DIY. Do your research before the project. Feel free to add tips, pictures, suggestions, or links here.

I'll kick it off with a compilation. Thanks goes to all contributors.

Quote:
Originally Posted by sprinterPaul View Post
Quote:
Originally Posted by norson View Post
Simple job, right? I've been changing my own oil for 60 years, but because this was going it the first time for a Sprinter I thought I'd check here first. GLAD I DID!! I think I could have screwed it up.
Norm
Going to check before changing trans fluid too.


The transmission is significantly more complicated than changing oil. Definitely in the realm of diy. But your checklist is much longer. I have the 7 speed. The 5 [NAG1] may be easier.
Quote:
Originally Posted by lindenengineering View Post
Yes with a 7 speeder you need a special pump injection tool!
MB has joined the gang!
Just like ZF,& Fords & Chevs etc, plus scan tool..Mustn't forget a scan tool.
Only Toyota/Lexus still retains the ubiquitous level plug!
Just like 60 years ago really when as a 9 year old I checked the gearbox oil level in a 1936 Hillman Minx in my dad's shop. And that was with a 3/8th Whitworth spanner!
All gone now!
Its called progress and DIY'rs are nowadays tolerated--just!

Dennis
Quote:
Originally Posted by lindenengineering View Post
This is the tool for this job.
Ensures you fill with the exact amount without wasting/spilling expensive fluid before checking final level with a scanner in most cases .

https://www.tooltopia.com/mityvac-mv...iABEgKoQ_D_BwE

7 Speed Kit.jpg

Dennis
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Old 10-13-2018, 02:50 PM   #2
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Default Re: 7 Speed Transmission (4 cylinder) Fluid Change

Here's an official Akubis Global Training video Adjust fluid level.



I understand some 722.9 may not have a dipstick tube to refill fluid.

A simple "shop made" apparatus could be fabricated (or reasonably purchased) to pump fluid via drain hole.

Adapt or $12.00
https://www.toolsource.com/fluid-eva...-p-122655.html
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File Type: jpg IMG_9300.JPG (80.6 KB, 177 views)

Last edited by Bobnoxious; 10-13-2018 at 03:26 PM.
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Old 10-15-2018, 02:40 AM   #3
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Default Re: 7 Speed Transmission (4 cylinder) Fluid Change

I just did this recently. I spent a fair bit of time researching. The 7 speed isnt new and there are a couple write ups on it from other mb models.

I'll post up my findings and some notes soon. Some minor part differences are present over time. Like stand off tube. Some special tools help. Etc
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Old 10-15-2018, 05:19 PM   #4
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Default 7 Speed Transmission (4 cylinder) Fluid Change

Quote:
Originally Posted by sprinterPaul View Post
I just did this recently. I spent a fair bit of time researching. The 7 speed isnt new and there are a couple write ups on it from other mb models.

I'll post up my findings and some notes soon. Some minor part differences are present over time. Like stand off tube. Some special tools help. Etc

https://mbworld.org/forums/c-class-w...ce-thread.html

This write up is a very good starting point


I used the tool Bob posted to fill. Was simple and easy since you need to be able to disconnect quickly after filling. Once the transmission is at temperature.

There's also a special drift tool to knock the stand off pipe out. I used that as well since it was easy.

For the 4 cylinder you need a special tool to rotate the camshaft and expose the torque converter drain. I bought a new drain plug that came with red locktite on it.

Main things are having the van level and keeping the transmission pan clean when changing the filter. Magnesium bolts are stretch spec so have a good torque wrench on hand!





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Old 10-15-2018, 08:06 PM   #5
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Default Re: 7 Speed Transmission (4 cylinder) Fluid Change

Especially working on Mercedes. Research the steps prior to commencing any service or repairs, accumulate proper tools and no-hurry time. This would include all recent applicable manufacturer's updates. Follow them scrupulously. She's a finicky beast she is.

A former aerospace supervisor was always chanting" Plan your work, work your plan" and avid Gantt charting animal he was down to the smallest details all measured in 60-minute increments. I think I saw him once counting how many footsteps it was from my tool box to the restroom.
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Old 08-02-2019, 09:42 PM   #6
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Default Re: 7 Speed Transmission (4 cylinder) Fluid Change

And I thought changing the transmission fluid and filter on my old T1N was overly complicated. . . .

Reading through all the materials and procedures, this seems like something I could do myself.

However, since my 2014 144 Crew needed to visit the dealer for the driver/passenger airbag recall and new NOx sensors (courtesy the 70k California emissions warranty), I decided to have them do the 60k mile transmission service while it was there. A 15% off coupon saved me a few bucks.

I can justify the splurge given I can do the engine oil, oil filter, fuel filter, engine air filter, cabin air filter and differential myself.
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Old 08-03-2019, 12:57 PM   #7
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Default Re: 7 Speed Transmission (4 cylinder) Fluid Change

Quote:
Originally Posted by patentgeek View Post
And I thought changing the transmission fluid and filter on my old T1N was overly complicated. . . .

Reading through all the materials and procedures, this seems like something I could do myself.

However, since my 2014 144 Crew needed to visit the dealer for the driver/passenger airbag recall and new NOx sensors (courtesy the 70k California emissions warranty), I decided to have them do the 60k mile transmission service while it was there. A 15% off coupon saved me a few bucks.

I can justify the splurge given I can do the engine oil, oil filter, fuel filter, engine air filter, cabin air filter and differential myself.

Did they replace the NOx sensors under warranty?
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Old 09-04-2019, 01:41 AM   #8
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Default Re: 7 Speed Transmission (4 cylinder) Fluid Change

Quote:
Originally Posted by Bobnoxious View Post
Did they replace the NOx sensors under warranty?
I've had mine replaced free under the emissions warranty at 45kmi (regular warranty expired).
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Old 09-25-2019, 10:55 PM   #9
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Default Re: 7 Speed Transmission (4 cylinder) Fluid Change

First post! - from a DIY-wanna-be who decided that in view of the complexity of changing the ATF we'd use the MB dealer service center for our

2014 2500 Sprinter Cargo van, Engine 651.955, 2.1L Diesel with 722.9 transmission, MB-M2CA170E/2014

- I called to confirm MB Service Center would change the ATF in the torque converter with an ATF change. Quoted a price of $530-545 + tax.
- Basic supplies for DIY cost $250 with shipping - https://europarts-sd.com/item.asp?PID=2320 plus some extra tools and IR thermometer. The process looked too complicated for a non-mechanic like me.
- I confirmed the torque converter would be flushed with the MB Service Representative when I left the van off for service. The bill was a tad higher than quoted as they add in an extra nonspecific charge of $45. I specifically asked why they only used 6 quarts for the service. But I did not argue at the time of payment because I thought I might be confused about the quantity required for a full flush. But, it looks, according to my notes, like it takes 9.5 quarts to do a full flush, not 6 qts.
- Called back and spoke with Service Rep who admitted he erroneously informed me about flushing the torque converter. He says this is how MB does it. My bill says "Perform Transmission Flush Per Manufacturers Specifications." He admitted that I'd been clear about the torque converter so he would speak with the shop manager. They have decided to allow me to bring the vehicle back to look for the torque converter drain plug. If it is there, they will do flush the TC. They do not believe my sprinter has the drain plug in the torque converter. Without a drain plug, he said they'd have to drop the whole torque converter which they do not do.
- I've looked for the bell housing cover and see a rounded black plug that looks smaller than the oval ones in the photos I've seen posted. The MB service dealer may be right that my particular transmission does not have a torque converter drain plug.
- Just curious if anyone can give their thoughts on the importance of flushing the whole system. Am I being overly concerned? This was our first ATF change at 50K. We are very compulsive about oil changes and have done the basic maintenance including fuel filters ourselves.
- Can MB service center flush the whole thing (torque converter too) or is it really not on their WIS? Any help would be greatly appreciated!

Again, we have a 2014 2500 Sprinter Cargo van Engine 651.955, 2.1L Diesel with 722.9 7G Tronic transmission. Thanks!
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Old 09-25-2019, 11:28 PM   #10
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Default Re: 7 Speed Transmission (4 cylinder) Fluid Change

Quote:
Originally Posted by Fun View Post
First post! - from a DIY-wanna-be who decided that in view of the complexity of changing the ATF we'd use the MB dealer service center for our

2014 2500 Sprinter Cargo van, Engine 651.955, 2.1L Diesel with 722.9 transmission, MB-M2CA170E/2014

- I called to confirm MB Service Center would change the ATF in the torque converter with an ATF change. Quoted a price of $530-545 + tax.
- Basic supplies for DIY cost $250 with shipping - https://europarts-sd.com/item.asp?PID=2320 plus some extra tools and IR thermometer. The process looked too complicated for a non-mechanic like me.
- I confirmed the torque converter would be flushed with the MB Service Representative when I left the van off for service. The bill was a tad higher than quoted as they add in an extra nonspecific charge of $45. I specifically asked why they only used 6 quarts for the service. But I did not argue at the time of payment because I thought I might be confused about the quantity required for a full flush. But, it looks, according to my notes, like it takes 9.5 quarts to do a full flush, not 6 qts.
- Called back and spoke with Service Rep who admitted he erroneously informed me about flushing the torque converter. He says this is how MB does it. My bill says "Perform Transmission Flush Per Manufacturers Specifications." He admitted that I'd been clear about the torque converter so he would speak with the shop manager. They have decided to allow me to bring the vehicle back to look for the torque converter drain plug. If it is there, they will do flush the TC. They do not believe my sprinter has the drain plug in the torque converter. Without a drain plug, he said they'd have to drop the whole torque converter which they do not do.
- I've looked for the bell housing cover and see a rounded black plug that looks smaller than the oval ones in the photos I've seen posted. The MB service dealer may be right that my particular transmission does not have a torque converter drain plug.
- Just curious if anyone can give their thoughts on the importance of flushing the whole system. Am I being overly concerned? This was our first ATF change at 50K. We are very compulsive about oil changes and have done the basic maintenance including fuel filters ourselves.
- Can MB service center flush the whole thing (torque converter too) or is it really not on their WIS? Any help would be greatly appreciated!

Again, we have a 2014 2500 Sprinter Cargo van Engine 651.955, 2.1L Diesel with 722.9 7G Tronic transmission. Thanks!


My 2016 had the torque converter drain bolt. And yes it takes way more than 6 qts.

Dennis has stated in the past that not all transmissions actually have it.


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