2024 GLC43 Jerky Transmission
Newbie
Joined: Nov 2024
Posts: 4
Likes: 3
2024 GLC43 AMG
I picked up a 2024 glc43 on Friday and I can see how some can complain but to be honest, if you know how to modulate the throttle properly it’s unbelievably smooth when taking off from a stop. You just have to wait for the clutch to engage before giving more gas. This may come easier to those who have driven a manual in the past but you wanna give it as much gas as you would if you were letting the clutch out yourself on a manual car as you reach the friction point on the clutch. This has been one of my favorite transmissions out of all the cars I’ve driven in the past 20 years
Senior Member
Joined: Nov 2019
Posts: 273
Likes: 17
2024 GLC43
I picked up a 2024 glc43 on Friday and I can see how some can complain but to be honest, if you know how to modulate the throttle properly it’s unbelievably smooth when taking off from a stop. You just have to wait for the clutch to engage before giving more gas. This may come easier to those who have driven a manual in the past but you wanna give it as much gas as you would if you were letting the clutch out yourself on a manual car as you reach the friction point on the clutch. This has been one of my favorite transmissions out of all the cars I’ve driven in the past 20 years
Out Of Control!!
Joined: Nov 2018
Posts: 11,432
Likes: 5,343
From: San Francisco Bay Area
2019 C63CS
I picked up a 2024 glc43 on Friday and I can see how some can complain but to be honest, if you know how to modulate the throttle properly it’s unbelievably smooth when taking off from a stop. You just have to wait for the clutch to engage before giving more gas. This may come easier to those who have driven a manual in the past but you wanna give it as much gas as you would if you were letting the clutch out yourself on a manual car as you reach the friction point on the clutch. This has been one of my favorite transmissions out of all the cars I’ve driven in the past 20 years
Last edited by superswiss; Nov 18, 2024 at 07:32 PM.
Newbie
Joined: Nov 2024
Posts: 4
Likes: 3
2024 GLC43 AMG
I've pointed this out often. There can be issues with particular implementations and the adaptations going wrong, but other than that, you are absolutely right. The nature of this transmission is very different from a typical automatic. As somebody who has driven manual transmissions for over 25 years, this is also my favorite automated transmission thus far. It feels most like a manual transmission while offering the convenience of an automatic transmission when desired, but you do have to understand that it doesn't have a torque converter in order to drive it smoothly. I've driven and owned several cars with dual clutch transmissions and while I like how fast they shift sequentially, they stumble when they have to skip gears and many of them are too smooth for my liking, making them feel clinical. The MCT has the right amount of rawness and character while offering the convenience of an automatic transmission if you just wanna drive along w/o shifting yourself. As I said previously, I drive my C63 mostly in manual mode, but when I just wanna cruise along, the transmission offers the convenience, but it still requires a level of involvement to drive smoothly. I like that a lot. Makes me feel part of the car, rather than being a passenger in my own car and have a computer that sorts it all out. It's not for everybody, but I appreciate that AMG hasn't given in and just slapping the ZF8 into their cars like BMW and Audi have done. It just makes those cars incredibly numb compared to back when they had manual or dual clutch transmissions.
Junior Member
Joined: Oct 2024
Posts: 21
Likes: 6
AMG GLC 43 2024
Yes, they have eventually decided it need a new transmission valve body, yours will need the same as the symptoms are identical, will advise in due course
whether it makes it better enough to be acceptable.
whether it makes it better enough to be acceptable.
Newbie
Joined: Nov 2024
Posts: 4
Likes: 2
2024 AMG GLC 43; 2023 GLE 450
The dealer took this seriously and did the transmission manual adaptation/reprogram multiple times and checked the transmission fluid. They said it was slightly better but still not shifting right. I was happy to hear that the technician verified the shift was not normal (not telling me it’s normal and just deal with it). They said they are waiting for MB to complete a software update. Which I hope comes soon but sounds like many have been waiting a while for this. I don’t know if they are going to keep my vehicle in shop until it comes in or not. I have a loaner CLE C300 with detuned 2.0T and the shifts are literally imperceptible. Maybe this doesn’t have the MCT. Either way, for my GLC 43 the shifting got progressively worse as miles increased. I just want it back to how it was at purchase because I don’t recall it being bad at all for the first 3k. I do appreciate the comments on the MCT driving differently than the torque converter, maybe I need to feather and drive like a manual and I will enjoy it. I didn’t think of that. I love the vehicle except for the quirky shifting. Hope it gets better with the software update.
MB World Stories
The Best of Mercedes & AMG
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun
Verdad Gallardo
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Verdad Gallardo
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine
Verdad Gallardo
Flawlessly Restored Mercedes 190E Evo II Heads to Auction
Verdad Gallardo
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know
Verdad Gallardo
Mercedes EQS Gets A Major Update: Everything You Need to Know
Verdad Gallardo
5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve
Verdad Gallardo
Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping
Verdad Gallardo
10 Most Reliable Mercedes-Benz Models You Can Buy Used
Verdad Gallardo
Junior Member
Joined: Oct 2024
Posts: 21
Likes: 6
AMG GLC 43 2024
Mine has had the very latest software update, couldn't have made much difference because MB asked for one final test which was done and the outcome is a new Transmission Valve Body has been ordered, should be fitted all next week. hopefully it will be much better, I doubt it though as the dealer tested a brand
new one they have in stock and apparently it was worse than mine! so it is as they said originally a characteristic of the car, although there seems to be degrees of it,
perhaps their new one also needs the Valve body replacing! The one I drove before ordering and the 2 since purchasing have not been as bad as mine.
I think I could actually reject the car, the problem is the only other car I would choose instead is the 2025 Audi SQ5 which is 4-6 months delivery now in the UK
new one they have in stock and apparently it was worse than mine! so it is as they said originally a characteristic of the car, although there seems to be degrees of it,
perhaps their new one also needs the Valve body replacing! The one I drove before ordering and the 2 since purchasing have not been as bad as mine.
I think I could actually reject the car, the problem is the only other car I would choose instead is the 2025 Audi SQ5 which is 4-6 months delivery now in the UK
MBWorld God!
Joined: Dec 2019
Posts: 32,394
Likes: 6,330
I have the exact same experience with my GLC 43- hard shift 2-3 and downshift 7-6. Took it in after my daughter said I was a bad driver and it bucked and almost stalled out a few times. I also went in for the A service since I’m at 7500 miles.
The dealer took this seriously and did the transmission manual adaptation/reprogram multiple times and checked the transmission fluid. They said it was slightly better but still not shifting right. I was happy to hear that the technician verified the shift was not normal (not telling me it’s normal and just deal with it). They said they are waiting for MB to complete a software update. Which I hope comes soon but sounds like many have been waiting a while for this. I don’t know if they are going to keep my vehicle in shop until it comes in or not. I have a loaner CLE C300 with detuned 2.0T and the shifts are literally imperceptible. Maybe this doesn’t have the MCT. Either way, for my GLC 43 the shifting got progressively worse as miles increased. I just want it back to how it was at purchase because I don’t recall it being bad at all for the first 3k. I do appreciate the comments on the MCT driving differently than the torque converter, maybe I need to feather and drive like a manual and I will enjoy it. I didn’t think of that. I love the vehicle except for the quirky shifting. Hope it gets better with the software update.
The dealer took this seriously and did the transmission manual adaptation/reprogram multiple times and checked the transmission fluid. They said it was slightly better but still not shifting right. I was happy to hear that the technician verified the shift was not normal (not telling me it’s normal and just deal with it). They said they are waiting for MB to complete a software update. Which I hope comes soon but sounds like many have been waiting a while for this. I don’t know if they are going to keep my vehicle in shop until it comes in or not. I have a loaner CLE C300 with detuned 2.0T and the shifts are literally imperceptible. Maybe this doesn’t have the MCT. Either way, for my GLC 43 the shifting got progressively worse as miles increased. I just want it back to how it was at purchase because I don’t recall it being bad at all for the first 3k. I do appreciate the comments on the MCT driving differently than the torque converter, maybe I need to feather and drive like a manual and I will enjoy it. I didn’t think of that. I love the vehicle except for the quirky shifting. Hope it gets better with the software update.
MBWorld God!
Joined: Dec 2019
Posts: 32,394
Likes: 6,330
Mine has had the very latest software update, couldn't have made much difference because MB asked for one final test which was done and the outcome is a new Transmission Valve Body has been ordered, should be fitted all next week. hopefully it will be much better, I doubt it though as the dealer tested a brand
new one they have in stock and apparently it was worse than mine! so it is as they said originally a characteristic of the car, although there seems to be degrees of it,
perhaps their new one also needs the Valve body replacing! The one I drove before ordering and the 2 since purchasing have not been as bad as mine.
I think I could actually reject the car, the problem is the only other car I would choose instead is the 2025 Audi SQ5 which is 4-6 months delivery now in the UK
new one they have in stock and apparently it was worse than mine! so it is as they said originally a characteristic of the car, although there seems to be degrees of it,
perhaps their new one also needs the Valve body replacing! The one I drove before ordering and the 2 since purchasing have not been as bad as mine.
I think I could actually reject the car, the problem is the only other car I would choose instead is the 2025 Audi SQ5 which is 4-6 months delivery now in the UK
Out Of Control!!
Joined: Nov 2018
Posts: 11,432
Likes: 5,343
From: San Francisco Bay Area
2019 C63CS
The CLE 300 doesn't have the TCT. The TCT and MCT are both AMG transmissions. The full names are AMG SPEEDSHIFT TCT 9-speed and AMG SPEEDSHIFT MCT 9-speed. The CLE 300 like other regular Mercedes-Benz models has the 9G-TRONIC 9-speed. The difference between the TCT and 9G-TRONIC is that the former has AMG tuned software that is more sport focused and the latter is much more comfort focused. The MCT in addition has the aforementioned hardware difference of using a wet clutch instead of a torque converter on top of the AMG software. AMGs and regular Mercedes-Benz are really two different worlds. Whether your AMG has the TCT or MCT, they will be rawer and harsher shifting than the 9G-TRONIC in a regular Benz. The CLE 53 has the TCT, although it's fairly smooth there, because the hybrid system does torque filling to smooth out the shifts and avoid bogging at low rpms by not needing to upshift as early in the name of improving fuel economy.
Last edited by superswiss; Nov 21, 2024 at 05:08 PM.
MBWorld God!
Joined: Dec 2019
Posts: 32,394
Likes: 6,330
The CLE 300 doesn't have the TCT. The TCT and MCT are both AMG transmissions. The full names are AMG SPEEDSHIFT TCT 9-speed and AMG SPEEDSHIFT MCT 9-speed. The CLE 300 like other regular Mercedes-Benz models has the 9G-TRONIC 9-speed. The difference between the TCT and 9G-TRONIC is that the former has AMG tuned software that is more sport focused and the latter is much more comfort focused. The MCT in addition has the aforementioned hardware difference of using a wet clutch instead of a torque converter on top of the AMG software. AMGs and regular Mercedes-Benz are really two different worlds. Whether your AMG has the TCT or MCT, they will be rawer and harsher shifting than the 9G-TRONIC in a regular Benz. The CLE 53 has the TCT, although it's fairly smooth there, because the hybrid system does torque filling to smooth out the shifts and avoid bogging at low rpms by not needing to upshift as early in the name of improving fuel economy.
I do realize it stands for torque clutch transmission after all.
Newbie
Joined: Nov 2024
Posts: 4
Likes: 2
2024 AMG GLC 43; 2023 GLE 450
I have the exact same experience with my GLC 43- hard shift 2-3 and downshift 7-6. Took it in after my daughter said I was a bad driver and it bucked and almost stalled out a few times. I also went in for the A service since I’m at 7500 miles.
The dealer took this seriously and did the transmission manual adaptation/reprogram multiple times and checked the transmission fluid. They said it was slightly better but still not shifting right. I was happy to hear that the technician verified the shift was not normal (not telling me it’s normal and just deal with it). They said they are waiting for MB to complete a software update. Which I hope comes soon but sounds like many have been waiting a while for this. I don’t know if they are going to keep my vehicle in shop until it comes in or not. I have a loaner CLE C300 with detuned 2.0T and the shifts are literally imperceptible. Maybe this doesn’t have the MCT. Either way, for my GLC 43 the shifting got progressively worse as miles increased. I just want it back to how it was at purchase because I don’t recall it being bad at all for the first 3k. I do appreciate the comments on the MCT driving differently than the torque converter, maybe I need to feather and drive like a manual and I will enjoy it. I didn’t think of that. I love the vehicle except for the quirky shifting. Hope it gets better with the software update.
The dealer took this seriously and did the transmission manual adaptation/reprogram multiple times and checked the transmission fluid. They said it was slightly better but still not shifting right. I was happy to hear that the technician verified the shift was not normal (not telling me it’s normal and just deal with it). They said they are waiting for MB to complete a software update. Which I hope comes soon but sounds like many have been waiting a while for this. I don’t know if they are going to keep my vehicle in shop until it comes in or not. I have a loaner CLE C300 with detuned 2.0T and the shifts are literally imperceptible. Maybe this doesn’t have the MCT. Either way, for my GLC 43 the shifting got progressively worse as miles increased. I just want it back to how it was at purchase because I don’t recall it being bad at all for the first 3k. I do appreciate the comments on the MCT driving differently than the torque converter, maybe I need to feather and drive like a manual and I will enjoy it. I didn’t think of that. I love the vehicle except for the quirky shifting. Hope it gets better with the software update.
Lastly, thanks to all for explaining the MCT and TCT differences and the different AMG engine systems- really helpful and great forum for a newer owner like me (only second vehicle).
Out Of Control!!
Joined: Nov 2018
Posts: 11,432
Likes: 5,343
From: San Francisco Bay Area
2019 C63CS
Yeah, don't take the name literally. Even MCT is somewhat non-descript, because the TCT and 9G-TRONIC have multiple clutches inside of the planetary gearbox. The MCT has just one more.
MBWorld God!
Joined: Dec 2019
Posts: 32,394
Likes: 6,330
Newbie
Joined: Dec 2024
Posts: 3
Likes: 2
2024 AMG HKC43 Coupe
2024 AMG GLC43 - Hard shift from 1st into 2nd
3 months old. 1500 miles. Just brought into dealer. Tried some software patch but didn't help. Said they changed valve body for someone else and will do the same to mine next week. Hoping that works. I'd like to like the car.
Senior Member
Joined: Nov 2019
Posts: 273
Likes: 17
2024 GLC43
A bit disappointed in this car which I'd like to love
Junior Member
Joined: Oct 2024
Posts: 21
Likes: 6
AMG GLC 43 2024
Never has any warning lights so that is a different problem but mine as as I suspected as others have had the same problem had to have the Transmission Valve Body replaced. It is much better now but will never be a smooth automatic transmission.
Apparently residue from the manufacturing process can sometime get in the valve body during manufacture
Several valve flushes were tried during investigations but the car had done a few thousand miles then
so a new TVB was needed which was fitted last week.
I complained within a few day to the supplying dealer who just did a software update which did nothing so I then rejected the car,
in the UK the manufacturer is only given one chance to fix it after a rejection. That failed, and it as the fourth time that had the car before it was fixed
I am waiting to hear about the rejection / offer any day now.
Apparently residue from the manufacturing process can sometime get in the valve body during manufacture
Several valve flushes were tried during investigations but the car had done a few thousand miles then
so a new TVB was needed which was fitted last week.
I complained within a few day to the supplying dealer who just did a software update which did nothing so I then rejected the car,
in the UK the manufacturer is only given one chance to fix it after a rejection. That failed, and it as the fourth time that had the car before it was fixed
I am waiting to hear about the rejection / offer any day now.
Newbie
Joined: Nov 2024
Posts: 4
Likes: 2
2024 AMG GLC 43; 2023 GLE 450
I have the exact same experience with my GLC 43- hard shift 2-3 and downshift 7-6. Took it in after my daughter said I was a bad driver and it bucked and almost stalled out a few times. I also went in for the A service since I’m at 7500 miles.
The dealer took this seriously and did the transmission manual adaptation/reprogram multiple times and checked the transmission fluid. They said it was slightly better but still not shifting right. I was happy to hear that the technician verified the shift was not normal (not telling me it’s normal and just deal with it). They said they are waiting for MB to complete a software update. Which I hope comes soon but sounds like many have been waiting a while for this. I don’t know if they are going to keep my vehicle in shop until it comes in or not. I have a loaner CLE C300 with detuned 2.0T and the shifts are literally imperceptible. Maybe this doesn’t have the MCT. Either way, for my GLC 43 the shifting got progressively worse as miles increased. I just want it back to how it was at purchase because I don’t recall it being bad at all for the first 3k. I do appreciate the comments on the MCT driving differently than the torque converter, maybe I need to feather and drive like a manual and I will enjoy it. I didn’t think of that. I love the vehicle except for the quirky shifting. Hope it gets better with the software update.
The dealer took this seriously and did the transmission manual adaptation/reprogram multiple times and checked the transmission fluid. They said it was slightly better but still not shifting right. I was happy to hear that the technician verified the shift was not normal (not telling me it’s normal and just deal with it). They said they are waiting for MB to complete a software update. Which I hope comes soon but sounds like many have been waiting a while for this. I don’t know if they are going to keep my vehicle in shop until it comes in or not. I have a loaner CLE C300 with detuned 2.0T and the shifts are literally imperceptible. Maybe this doesn’t have the MCT. Either way, for my GLC 43 the shifting got progressively worse as miles increased. I just want it back to how it was at purchase because I don’t recall it being bad at all for the first 3k. I do appreciate the comments on the MCT driving differently than the torque converter, maybe I need to feather and drive like a manual and I will enjoy it. I didn’t think of that. I love the vehicle except for the quirky shifting. Hope it gets better with the software update.
Update: I have 1500 miles since the dealer did the adaptation (multiple times)and it has been perfect! Really happy with city and country and highway driving. Feels like it was at day one. Zero issues at this time. Love this vehicle!
Newbie
Joined: Dec 2024
Posts: 3
Likes: 2
2024 AMG HKC43 Coupe
Valve Body Replaced
8 days later I got my car back. They replaced the valve body and the hard shift into 2nd issue has gone away. So far so good though I think it is shifting into 2nd at a higher rpm than before.
Junior Member
Joined: Nov 2024
Posts: 47
Likes: 5
So Disappointed
Here I go and buy a MB for the first time ever and we have the same problem with our 2025 GLC 43, and on top of the transmission issue the sunroof stopped working it moves in a 1/4 inch increments, I wished I would have done a better research about MB we have 400 miles on it and have to drive to the dealership more often now.
