Nice Ride

Wake up.... Your dreaming.....

S_W222

hey, what do you mean? I took my car several times to several places, whole year of back and forth, and the guy who finally fixed the car is someone I know personally who was updating me literally every 1-2 hours explaining every step he made.
so what do you mean by “wake up, you’re dreaming”?
for your info, we did shifting adaptation several times and recorded all values, it was only one value that needed to be optimized until car stopped jerking from 3rd to 2nd gear. Yes it was done via multiple trials but in the end it worked exactly as described.

Nice Ride

It was only a joke.... I'm actually happy it worked. I had a similar issue. The only time I get the shift issue is when the car is cold. I had them do a Trans Flush and filter a little early 35,000, thinking it would help. No change, the reset only held for a few weeks. I'm happy that you actually found a dealership / tech that cared and or is trained properly to diagnose. After they returned the car I had 1 harsh Bang into gear. Never happened again.

I apologize, should have put LOL after comment. Most dealers don't care or don't have the extra time to test. If it does not throw a code, they usually throw there hands up. Its amazing that they found a solution, and it actually makes sense what they did.

S_W222

I apologize too if I misunderstood you.
anyway, you are right it was hard to finally find someone who was willing to do the extra work and fix this. Honestly when I spoke to him, and even before he tested the car, he was like “yep yep I know what you’re talking about”. He was very familiar with this issue and knew it’s common. He spent one day first checking all possible mechanical parts and electric components to confirm, then on day two be proceeded with the shift optimization while driving the car at same time. He kept for a 3rd day to further optimize certain values starting from cold engine and in the afternoon of that day he asked me to pick it up. It has never been as smooth as it is now even when it had 0 miles on it. The only time when i “feel” the shift is when it’s cold (120 engine or lower) but it still don’t jerk at that point but kinda an up shift 2nd to 3rd that u can feel. Once engine hits 140-160, I barely feel it when it shifts. I think it’s a shifting optimization issue. I heard that HQ will be issuing a new software with right shifting scheme by January-February... anyway i think whatever that software would do I think is going to be similar to what my service engineer did on my car. It certainly a software not a hardware/mechanical issue!

ebceksl

Hi, is this discussion related to the 7G transmission?.

S_W222

Yes it is

ebceksl

Thank you. I some times have the rough down shift problem from 5->4.

S_W222

yes, it’s a common problem. You should be able to fix it, just ask them to download the most recent software available and most importantly to do the manual shift adaptation. The transmission reset is just a waste of time, don’t let them even try it.

ebceksl

Thank you very much for your advice!

swaynesworld

I’m not experiencing any of this in my 2015 S550 4matic. I don’t drive in sport very much but I do drive aggressively and the computer recognizes the changes in my driving habits especially when I drive over 50-60 miles at a time and it adjusts shift points accordingly.

C Swenson

Any more information regarding the "January software update"? My 2015 definitely shifts hard from 5 > 4. Starting to drive me a nuts...

S_W222, what year is your S550? And what type of warranty was the repair covered under? Original? Extended MB or third party? CPO? Thanks.

S_W222

I don't think anyone needs to wait for the january (assuming there is any). I got mine fixed last year when I posted this thread 2-3 months ago!. M5 S550 is 2015 and at that time it was under extended MB warranty.

MichaelinATL

Just got my 2016 back from the local ATL dealership (they are aware of problem) for this issue and they punted...said MB doesn't have new software release ready.

They refused to call SA, Joe Dias at Penske Automotive who knows how to do manual shift points adaptations for guidance. Too proud, maybe...I don't know.

Maybe time for a new dealership :-(

More to follow...

konigstiger

Membership FYI - speak with shop foreman, who will/should normally check for upgrades, and request “forced adaptation”:

S_W222

Wow..Finally somebody was able to describe what they did on my car in much more details and better words than I was trying to describe since last year! When i compare what written in your response what the SA told me, I can tell you this is exactly what they did last year and it worked like magic and still working!

C Swenson

Thanks konigstiger for the specificity and thank you S_W222 for starting the thread in the first place.
I've got an appointment in a couple of weeks to have this worked on. Let you all know how it works out.

bkdc

How rough is rough for you guys? My 5 to 4 is only slightly rough and noticeable but shifting in almost all other gears is buttery smooth.

The ratio from 5th to 4th gear is a big jump.

C Swenson

First number of times I noticed it I thought I just drove over a stone or something. And with getting use to a new for me car, other things had my attention. I was also trying to figure out a brake shudder problem. After I got the rear pads and rotors done (eliminating the shudder and my obsession over it) the awareness of the hard shifting rose to the foreground. I found this thread after I started noticing it. Then I started to track it. Sure enough, decelerating I'd feel it and then look down to see I was in 4th. What does it feel like? A "jarring" rather than a "slamming"? Is it rough? Yup. Definitely a feeling of "this ain't right". I notice it each and every time from 5 to 4. And, yes, everything else is buttery smooth.

S_W222

After the software and shifting adaptation, the 4-5 shifting is as smooth as all other shifts (don't know if it's fair to call it buttery smooth, but yes very smooth). The only one that's not buttery smooth is 2-3 but ONLY when it's cold, then it goes to buttery smooth as soon as it reaches 160F.

2012 merc amg

Yes I remember with my 2015 the 5 to 4 downshift was very abrupt at certain times but not all the time. A couple times it was so abrupt pulling off a exit ramp off the highway I thought somebody hit the back bumper of my car. I traded that car in about a year and half ago but I recently got a 2017 S550 which has the G tronic 9 speed trans but the same 4.7 motor. Now this car has that downshift issue from the 7 to 6 gear downshift, strange. I thought I'd be rid of problems with the 9 speed, nope.

Conrad Wo

So a New York dealer kept my car in service for almost 2 weeks for the 5-4 (2015 s550 CPO). After having a foreman drive it home And back
they said they are unable to fix it and that they are awaiting a “software update” first or 2nd quarter of 2020. I honestly think it’s a MB corporate scam for all of us to get out of out warranties. Maybe a class action suit would get them to actually care about our s classes?

S_W222

konigstiger posted a screenshot of the recommended steps for the service, and I also shared in previous comments under this thread the service receipts and comments they made when they got mine fixed successfully following forced adaption method. I don't understand why service departments at some location can do the same, i agree that this is annoying, but I suggest you try another MB dealership. If one MB deadlership was able to do it on my car, then others should be able to do it the same way.

Conrad Wo

The dealerships refused to look at the successful remedy and said that MBforums are not relevant to them.

S_W222

Well, not when there is a screenshot uploaded from one of their other locations!. The screenshot that I included for the service record and comments is taken from the service sheet the MB gave to me after the service was done, therefore they can't say it's not relevant. It has nothing to do with the forum, it came originally from one of their locations. Anyway that's what they say when they don't know how to perform the same service!

tkelley.EClass

I'm personally still fighting this as well. It's only gotten worse. Feels like the engine is going to fall out of my car.