NJProTech

There is a known issue with the torque converter lock up clutch. Fault could be the TC itself or the valve in the valve body. Requires some detailed diagnosis. Most techs blow it out the door. Good luck. The best or NOTHING

harryd840

Hello Guys,

Did anyone get it fixed? If yes, then what was the problem...
I am planning to take it back to the dealer again...jerks are becoming annoying as I can now feel them even on a slight incline during upclimb...

Cheers,
Harry

Huz-Z

I haven't yet, although the service rep at Mercedes Benz Canada's customer relations 800 line admitted to my wife that other customers are complaining about this issue. Also, Mercedes own website states:

http://www.mercedes-benz.ca/content/...nsmission.html

"
The 7G-TRONIC PLUS automatic transmission features lowered fuel consumption, extremely gentle gearshifts and a reduced noise level.

• Seven forward gears: A larger ratio between lowest and highest gears, with shorter intervals from gear to gear to enhance driving comfort.
• Optimum engine speed: The result is reduced fuel consumption and virtually imperceptible gearshifts.
• Prodigious pulling power: Multiple downshifting enables quick bursts of speed.
• New torque converter generation: Less wear, further reduced noise levels and more dynamic response thanks to innovative transmission technology.
• Comfortable or sporty: You can pre-select one of two drive programs: "E" (Economy) or "S" (Sport) for reduced-consumption or sportier driving. On some models, the "M" (Manual) transmission mode can be used for even quicker gearshifts."

I will be insisting to Mercedes that our car perform as advertised.
This rough shifting is clearly highly abnormal and entirely inconsistent with what Mercedes is telling prospective customers about the car.

harryd840

Thank you, I will call MB Canada customer service again...

harryd840

I just found the following link where guys are pretty much facing the same issue in 'E' mode on their '2014 GLK350'. Someone suggested to try the following -
https://mbworld.org/forums/glk-class...g-problem.html

adaptive throttle reset...
You can reset it by:
1) turn the electronics all the way on, but not the engine
2) press the accelerator to the floor and hold
3) after 5 seconds, turn the key off, but DON'T remove the key THEN take your foot off the pedal
4) wait a couple (two) minutes and it should reset

Will try it today and see.

harryd840

https://mbworld.org/forums/glk-class...g-problem.html

mstrbenztech

I did not read through every post but there is a 4-3 downshift issue right now with the new cars. There is a possible software fix in the works but right now its in development.

accurately

Same problem with our car!Jerking/jolt randomly when driving and even when braking sometimes. We have a 2010 glk 350 and no issues.

Our 2014 C300 was just bought in december 2013 and only has a bit over 2,000km on it. Took it in once to the dealer and they reset the tranny software - if anything now its worse!

seems to be random but usually in 3rd-4th gear i think? downshifting sometimes does it and also when accelerating. I just did the throttle reset today as posted above, but still didnt fix it.

Getting frustrated. Likely have to go back to the dealer for a second time. They seem to have no clue or don't believe there is an issue. Hard to replicate also on a test drive.....

edit: this happens on Eco mode, E mode, or even Sport mode..makes no difference

harryd840

@mstrbenztech - Thank you for the info. In case you get to know when the fix will be available then please do let us know.

harryd840

@accurately - I know it's frustrating. I got in Oct 2014.

PeterUbers

Same issue with 2014 E550 .. and this is my 2nd one!!

Just read through these posts.. having the exact same issue with 2014 E550 4-matic, and actually went through a long process to have MBUSA buy back my 2014 E550 and replace with a brand new, custom ordered one.

Does the same thing, mostly a harsh downshift when slowing to a stop from 5th to 4th gear. All the 2013 C300 loaners I've had have had a super smooth transmission. Not sure why the 550's are doing this. I've talked to many 2014 E-class owners with the same issue.

What changes in 2014 for everyone? E Class, C Class? Software?

Glad I'm not alone, my first 2014 E550 had a valve body then 4th/5th clutchpack replacements -- the problems improved, but slowly came back over a few months

PeterUbers

I talked with the service manager about this again today and he says he's received no information about this through the benz pipeline, he thinks that my case, and a couple other clients' cases including my NEW CAR that has only 200 miles on it .. are outlying cases, but now he's starting to believe it's more prevalent and most people just don't care, don't notice, or are told it's "normal"

Huz-Z

On March 20 the Canadian Field Service Manager for eastern Canada assured me that this problem is not normal and he committed to getting it fixed.

rossono308

Sadly, I thought the conductor plate would solve the problem. For a while it did feel better but as the days went on all the problems reappeared. I drove a 2013 E350 Sport and a 2014 C300 Luxury (exactly like mine) as loaners when I had my car in and all had the same problem. This looks like a growing problem with late 2013 and 2014 versions of the transmission. Considering how widely it's used, it has to be on the MBUSA radar. Back to the dealer for me although I don't know what they can do until MB figures this out.

PeterUbers

Rossono, I'm dealing with naperville Benz, I see you're dealing with westmont

I'll keep you up to date and please do the same, we are in the same boat

rossono308

They are actually the same dealership (Autonation). The service department has been exceptional so far but I'm not sure what they can do next. I'm going to call this AM and let them know the fix didn't help and the ball is in their court. Strike one.

Huz-Z

My car is still at the dealership and I expect it back in a day or so. I'll let you guys know what they did and if it has worked.

Based on what you guys are reporting though, I am worried. I have been bugging Mercedes on this since November and this is the fourth repair attempt. the Canadian field services manager personally comitted to repairing our car. So. Nothing less than a properly operating transmission is acceptable at this point. Failing that I want a new car or a full refund.

PeterUbers

Huz-Z -- a new car will not solve your problem necessarily, look at my situation.

Get your money back and go elsewhere, that's the only solution until a true fix is out.

The reason I didn't push for my money back was that I love my E550 -- it's a great car, tons of power, and I don't like anything else for the money -- not an audi, bimmer, or lexus fan ... i love lexus quality but just don't love their boring cars right now.

I'll be patient and hold out, it's something I can get used to and my service department is willing to replace the clutchpacks in this car as well, as they did with my previous E550

Please continue to update us all, I'll do the same, and thanks for your contributions to the information on this board

PeterUbers

what's unique about the 3-4 or 4-5 shifts that everyone, including C300 and E350/550 owners seem to have clunks in these shifts ..?? Is there a significant mechanical motion in the transmission in this area of shifting? anyone mechanically inclined have a good answer for this?

PeterUbers

I'm thinking IF a fix is going to come out, it's being tested now among several lines of vehicle at MB-central in germany or wherever the hell they figure this stuff out.

When they were initially fixing my first 2014 E550, they were directly working with engineers in germany who had them rip open the entire transmission and look at each part individually. Even though the 4/5 clutchpack looked normal to the tech, the german engineers directed him to replace this clutchpack with a new one.

Once he did, the clunk went away and the adaptations were in normal ranges (via the report on the CPU) and the car ran smooth. Over time however, the clunk came back, but much softer and never as harsh as day 1. However, before i could really tell what would evolve.. the car was bought back by benz and a new one was given to me

Huz-Z

Hey Peter.

I can't argue with you on that, a replacement car may have the same issue. I don't have a particular brand loyalty here. But I am regretting not getting the 328 x drive that I wanted to buy in the first place.

Huz-Z

Still no word from the dealer. Car has been in the shop almost a week now.

PeterUbers

My car was in the shop a total of 32 business days -- hence I met Illinois lemon criteria....

they were as baffled as your technicians likely are at your dealership.

For what it's worth, the 4 c300 loaners that I drove over 4-5 months and the 2013 ML350 did not have any clunking when downshifting.. they were very smooth - all had the 7G-tronic transmission.

rossono308

Were they sport models or luxury? I've found the sport transmission better overall in shift quality. I did have a 2013 E350 Sport that shifted poorly.

PeterUbers

I have a CLS550 loaner now, once mbusa heard that my new replacement was defective, they wanted my car IMMEDIATELY to repair it -- they're not going to f--k aruond with adaptations, they are ripping it completely out of the car, ripping it open and changing that damn clutchpack

the problem is not software people