W205 Transmission issues
Junior Member
Joined: Oct 2018
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C400
Senior Member
Joined: Jan 2018
Posts: 296
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From: SF BAY AREA
C400
UPDATE: I would NOT settle for the 5 quart service and go along your way. Bad enough your leaving 4 quarts in that are old but having 5 plus new quarts, a new filter and the correct level will make a HUGE difference in how the car shifts and possibly the longevity I would venture to guess. So THERE Is HOPE.
Alex
Super Member
Joined: Mar 2018
Posts: 740
Likes: 135
From: Westchester County, NY
‘15 C300 4M Sport, ‘20 GLC300
Member
Joined: Dec 2014
Posts: 193
Likes: 11
2018 C300
For what it is worth to folks... I had the valve body replaced on my transmission for very rough 3 - 4 upshift on occasion (it shifts like crap all the time, but that's the one the dealer could replicate). They replaced it, it seemed buttery smooth for a few months. It's back to the way it was before and in fact shifts poorer than when I first got it. I feel like it has more to do with the stupid crap the adaptation and related software is doing to try to "smooth" the experience. It is likely not a "hardware" issue when it can't be replicated every single time under the same conditions. This is my second C class with a poor shifting transmission and it's gonna be my last when the lease is up.
Newbie
Joined: Apr 2024
Posts: 10
Likes: 0
C class 2.0
issue
How do you check the fluid level in the transmission? How much did you use to fill it up?
Also, did you have the long 1st and short 2nd gear issue? If so, did the fluid top-up fix this issue as well? You can see what I'm talking about here:
https://youtu.be/0Iqvzv00ZNY
Also, did you have the long 1st and short 2nd gear issue? If so, did the fluid top-up fix this issue as well? You can see what I'm talking about here:
https://youtu.be/0Iqvzv00ZNY
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Senior Member
Joined: Nov 2016
Posts: 268
Likes: 21
2017 Mercedes-Benz C300, 2017 Mercedes-Benz GLC300
Yes, bad software. MB updated their transmission software mid 2016. All their 7G transmissions built after that have the same bad shifting pattern. Of course they won't admit it, but we know it's crap.
I ended up buying a new MB with the 9G transmission. The 9G is flawless.
I ended up buying a new MB with the 9G transmission. The 9G is flawless.
Newbie
Joined: Apr 2024
Posts: 10
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C class 2.0
Yes, bad software. MB updated their transmission software mid 2016. All their 7G transmissions built after that have the same bad shifting pattern. Of course they won't admit it, but we know it's crap.
I ended up buying a new MB with the 9G transmission. The 9G is flawless.
I ended up buying a new MB with the 9G transmission. The 9G is flawless.
Senior Member
Joined: Nov 2016
Posts: 268
Likes: 21
2017 Mercedes-Benz C300, 2017 Mercedes-Benz GLC300
Thank you for your response. My problem is especially in Sport+ mode, during the 1st -> 2nd -> 3rd gear changes, car basically is jerking strongly. You can feel it when these gear changes happen. in Comfort mode, this happens but not so strongly. After your MB 7G tronic software update, issue is resolved? Thanks
I've heard of some people being happy after the software update.
MBWorld Fanatic!
Joined: Jun 2012
Posts: 1,229
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From: Toronto
2022 E53 AMG
My cars has the 7G Sport or whatever they call in the AMG variants.
It shift poorly once the transmission warmed up. It would shift from 2-3 harshly and not refine for MB. They took me for a ride because after 1 month of back and forth, they wanted me to see on the laptop what the transmission was doing. The transmission would jerk from 2-3 one it got warm and on the laptop, it would blink green for OK. The rep ended up sending this data to AMG and AMG responded that I may have a faulty Clutch Sensor, so they changed it. It was night an day, you can still feel the transmission shift from 2-3 but it's not harsh but you will noticed it if you pay attention and other times, you will not notice it. My car is 2016, had the transmission service at 100K when thought it stated 120K.
No transmission related issues now but my light second light is now not working.
It shift poorly once the transmission warmed up. It would shift from 2-3 harshly and not refine for MB. They took me for a ride because after 1 month of back and forth, they wanted me to see on the laptop what the transmission was doing. The transmission would jerk from 2-3 one it got warm and on the laptop, it would blink green for OK. The rep ended up sending this data to AMG and AMG responded that I may have a faulty Clutch Sensor, so they changed it. It was night an day, you can still feel the transmission shift from 2-3 but it's not harsh but you will noticed it if you pay attention and other times, you will not notice it. My car is 2016, had the transmission service at 100K when thought it stated 120K.
No transmission related issues now but my light second light is now not working.
Newbie
Joined: Apr 2024
Posts: 10
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C class 2.0
How do you check the fluid level in the transmission? How much did you use to fill it up?
Also, did you have the long 1st and short 2nd gear issue? If so, did the fluid top-up fix this issue as well? You can see what I'm talking about here:
https://youtu.be/0Iqvzv00ZNY
Also, did you have the long 1st and short 2nd gear issue? If so, did the fluid top-up fix this issue as well? You can see what I'm talking about here:
https://youtu.be/0Iqvzv00ZNY
Newbie
Joined: Apr 2024
Posts: 10
Likes: 0
C class 2.0
Senior Member
Joined: Nov 2016
Posts: 268
Likes: 21
2017 Mercedes-Benz C300, 2017 Mercedes-Benz GLC300
Newbie
Joined: Apr 2024
Posts: 10
Likes: 0
C class 2.0
How do you check the fluid level in the transmission? How much did you use to fill it up?
Also, did you have the long 1st and short 2nd gear issue? If so, did the fluid top-up fix this issue as well? You can see what I'm talking about here:
https://youtu.be/0Iqvzv00ZNY
Also, did you have the long 1st and short 2nd gear issue? If so, did the fluid top-up fix this issue as well? You can see what I'm talking about here:
https://youtu.be/0Iqvzv00ZNY
Hello, i am exactly same issue. Have you managed to fix it?
