Do you guys know how to reset the adaptive algorithm in our GT’s? First to second gear is horrendous, huge delay and jerky!

 

Via XENTRY, you can try the floor gas with vehicle off and hold it for minutes technique but I don't think that does anything nowadays, still worth trying, it is free anyways.

 

 

Aside from resetting the adaptations, how do you drive the car typically? What modes and what's your driving style? The thing about resetting is that eventually it relearns your potentially problematic habits. One of the things that the AMG instructors at my first AMG Driving Academy event told us is to not use Sport+ or Race or even Sport around town for slow speed driving. They are meant for the open roads and faster speeds. If you use them around town, the adaptation algorithm doesn't really know how you wanna drive. By selecting Sport+ you indicate that you wanna drive sporty, but then you are tooling around town at low speeds, the complete opposite of what the mode is meant for.

I drive AMGs or similar performance cars primarily in manual mode. Pretty much about 90% of the time at least. Partly a habit of having driven manual transmissions for over 20 years. I only let the transmissions shift on their own in the Comfort/Normal modes with moderate driving around town, in stop&go traffic which I don't do a lot and when just cruising along on a long road trip with DISTRONIC engaged. Most of the rest of driving I do in Individual mode, which in AMG's case I configure to put the powertrain in Sport+ and transmission in M and the suspension in the middle Sport setting for a good balance between handling and comfort. Pretty much all my regular highway driving I do in M and Individual mode. So I go between Individual mode on the highway or faster open roads and Comfort with the transmission in automatic mode around town, and I use Race with transmission in M for fun canyon roads. I've driven every performance car ever like this using the respective available modes. Some of them don't/didn't have an equivalent mode for Race, so those I generally don't like as much as they don't offer another mode above my regular sporty driving mode I can select for closer to the limit driving in the canyons.

The result is that the transmission algorithms essentially only adapt to my moderate driving style and end up being fairly smooth at low speeds as I do all the spirited driving shifting myself, so the adaptations don't have to find a compromise between my moderate and spirited driving styles. Having an understanding of learning algorithms as a software developer the more consistent your behavior is, the higher the chance they learn correctly. If you end up all over the place, they don't really know where to settle on the spectrum. Some more modern learning algorithms are able to learn different behavior based on your location, but I'm not aware of any of those being used in cars. One such algorithm that comes to mind is the optimized charging feature in iOS which tries to determine your phone charging habit at each location where you charge and then pause charging at 80% and only finish charging to a 100% shortly before you typically take the phone off the charger. But just like as said, this algorithm doesn't work if your charging habits are all over the place and at vastly different times. So consistency goes a long way.

 

im pretty much doing the exact same set up you have, but just recently in all modes, even in auto or manual shift mode, first to second gear is not right. As it shifts, it pulls in the clutch, and revs up, then engages second gear, creating a very jerky experience. All other gears are fine.

 

That's odd behavior for a DCT and not sure that is adaptation. Being a DCT, 2nd gear is already engaged, so all that happens during a shift is opening the current clutch as it closes the second clutch. This type of shift happens virtually w/o power interruption. Jerky shifts are more common on downshifts when the adaptations get funky. Does this happen both under partial and full throttle? Anything else noticeable with any of the other even gears?

 

Not that it matters but we dont have a DCT in the C192 --- its the MCT.

 

Just realized this is a C192 in a C192 sub-forum oops, did the transmission get enough time to adapt to driver behaviour yet? OP did not give us any information, not even mileage.

 

Oh it does matter. For some reason I thought I was in the C190 section. My bad. I take back what I said. I don't recall reading about harsh 1-2 upshifts in the MCT, either, though. Mostly also jerky downshifts when things are out of whack. Having said that, under light throttle the 1-2 upshift can be a bit lets say unrefined. You have to commit to the throttle. I also notice if I drive in somewhat of a hesitating fashion for a while, because of cars ahead of me that start moving and then slowing down again it can get a bit jerky until I get some more open road again and drive it my way for a while. It relearns and particularly once the transmission is nice and warm things smooth out. Having said that, there's always the possibility that there's a bad valve or solenoid causing an issue. Resetting the adaptations is one possibility to rule it out, another is to take it for a long good drive and take the transmission through its paces.

FWIW, I had a jerking issue early on when going from P to D or R. That did turn out to be an adaptation issue, because I didn't bother putting the transmission in P whenever I parked the car and simply turned off the engine and let the transmission go to P on its own. I stopped doing that and explicitly started putting it in P, which w/o resetting the adaptations it relearned whatever it needed to and within about 2 weeks, the jerks went a way. What I'm trying to say is that these transmissions learn on a continues base and just changing your behavior can result in clearing the issue, or as I said before if you continue a certain behavior and/or driving style, the issue can just return after resetting the adaptations.

 

Same, I didn't know I was in the C192 section.

 

3000 miles on the car, original owner.

 

That's still early on in the cycle and it likely hasn't finished the full adaptation cycle. It reminds me of the initial experience I had with the 9-MCT. I did European Delivery back in 2019. Drove around Europe for 2 months. Mostly high speed German Autobahn and highway driving in general. Not much city driving. So whenever I drove in the city/town while coming to a stop, the transmission would downshift to 1st gear while the car was still moving, making for a very jerky stopping experience. I had almost 7000 miles on it when it arrived in the USA and I started to do more around town driving. It continued to do this jerky downshift to first until one day it suddenly stopped and stayed in 2nd gear until the car came to a fully stop. I didn't change anything. I just kept driving it in town and it simply adapted finally to that kind of driving.

 

Yup you need to give it more time to learn your driving habits, do you usually drive in stop and go traffic? That plays a role as well but I think that was already mentioned.

 

7000 miles is way past break-in time, didn't know it takes that long for it to complete the adaptation process. If OP drives in manual mode often I guess the car also doesn't have a chance to learn?

 

My daily drive to work is in sport setting with manual shifting. It’s about 25 minutes to work, on city streets, no highway. Some stretches between traffic lights can be a few miles. Car was totally fine for the first 2500 miles then out of nowhere this first to second shift issue. Nothing has changed in my commute or driving style

 

I see. Did you follow the breaking-in instruction and drove it in C for the first 1000 miles and not use manual mode? Or is this how you drove it from the very beginning? If you haven't driven it in C and Auto long enough, then it never adapted the baseline. If you reset the adaptations, you get a do-over, so then you need to drive the next 1000 miles according to the breaking-in instructions, or as I said, the transmission learns continuously, so start doing your commute in C with transmission in Auto and see if it adapts. You gonna have to be patient, though and stick with it either way. You have to let the transmission learn as AMG intended.

https://www.mbusa.com/en/owners/manu...on-breaking-in

 

I don't think the mileage is particularly relevant. It's more that while I did follow the break-in instruction and kept it in C while varying my speed for the first 1000 miles, I didn't do much city driving for the first 7000 miles. It was mainly highway and open country roads. Once I got to my destination, I tended to park the car and explored on foot and public transportation, or bicycles in places like Copenhagen where barely anybody drives and everybody rides their bike. It wasn't until the car got to the States and I drove more in city/town environments and denser traffic in C/Auto, did it have a chance to properly adapt to city driving.

 

Seems like OP does manual driving quite a bit that might explain why the adaptation didn't complete in a way OP wanted. I guess in that case (if it is bad adaptation) then to hook up XENTRY and reset it and see if it is really a mechanical issue.

 

Which technically isn't an issue. As said I mostly drive in manual mode as well, but I didn't start doing that until well past the break-in mileage. I actually even mostly avoided monotone highway driving for the first 1000 miles and primarily drove on country roads where I naturally had to vary the speed. A couple of days after taking delivery of the car I drove for 6 hours from Germany to Switzerland all on country roads instead of making it a 3 hours highway trip. I checked the "Avoid highways" option in Google Maps and let it take me on the scenic route.

 

I say you would prefer using the built-in system using here's maps instead right? Thing is you had the pleasure of doing the break-in on the autobahn in Germany, OP doesn't so there is that too, I wonder how did OP break-in theirs.

 

Took the car and and was told there is a software issue on these cars with no fix as of now. The problem is when you do a full throttle shift, the car remembers how it shifted during full throttle, then applies that to normal shifting. Resetting the shift algorithm through the dealer fixes it until you do another full throttle run. Enraging.

 

Good to know, but wondering why I didn't experience this last September when driving the GT63 on the track in Germany and then on normal roads. These things get flogged around the track, but it shifted fine driving to and from the track before and afterwards. There must be more to this or it's a recent bug that got introduced with an update. Good luck waiting for the fix. The W206 C43 has had an issue with the transmission since it was unveiled and I believe owners are still waiting for a fix.

 

After further thought this sounds made up. Do they really think people believe that during development and testing nobody ever did a full throttle shift? If it was this simple it would have been found during development. Either they just made something up to get rid of you, or they didn't fully explain what steps lead to this, otherwise this would be a widespread issue with everybody who drives these things hard.

 

looks to be an extremely wide spread case with C43 using our same transmission

 

So, on the C43 the issue has been identified as a certain driving style during the break-in causing an incomplete initial adaptation cycle. They didn't specifically say what it is that causes it, but my personal hunch is that it's caused when owners don't stay in Comfort mode for the first 1000 miles, and use WOT too early. The issue first appeared on the press cars, which are driven by a bunch of journalists in less than an ideal way. I have not heard of this issue on the GT press cars. Also in case of the C43 it was the first time AMG paired this transmission with a non-V8. The MCT was specifically designed for the V8 engines, so I also suspect they left a few rough edges making it work with a smaller less torquey 4 cylinder. I'll repeat it again, stick to the break-in instructions as laid out in the owner's manual and the sticker in the windshield. Don't start using Sport and higher modes, use only partial throttle and stay below the specified rpms, and don't do manual shifting before completing the break-in.