2024 GLE 450 Harsh downshifting while breaking behavior (recently)




Meh, it won't last forever.
I have a 2024 GLE 450 and I recently started to experience some harsh downshifting while breaking, for the last 2-4 weeks. Vehicle is 7 months and has 8,500 miles.
It happens around 40% of the time, but only if the car was in 5th gear or higher. Otherwise either it doesn't happen or it's so mild that I don't feel it. If you put the vehicle info screen with acceleration and braking you can see the braking going from 8% to 16% or so when this happens.It looks like the car is deliberately using 5->4 (and 5->3!) to apply a good bit of extra braking. But it's so much that is not smooth and gets annoying. In my case it lasts until coming to a stop, so I am not sure if it's the transmission or the whole braking behavior/system/programming. It seems more pronounced when there is a car in front of me, or there is a stop sign, so maybe? (I have driver assistance package). This may be totally placebo and instead it may be related to the current speed before braking. I am not sure if the assisted braking uses radar/stop information or not. I know the regen does, cranking the regen if there is a slowing vehicle in front.
I'll mention this to the dealership next time the car is there and I have a loaner. It would be great if they can reset the parameters to what it was before.
I've seen several posts over the years complaining about this behavior – I wonder if other folks with 2024 GLEs are experiencing this.
I guess I will try the relearn process to see if it will help.
I guess I will try the relearn process to see if it will help.




Previously two technicians had to drive around while performing a set of tasks.
Until there's a chance to get to the Dealer, it's a good idea to perform the At Home relearn for two reasons. 1. It might work, and 2. You can tell the Dealer that you've completed the first step in troubleshooting.
Previously two technicians had to drive around while performing a set of tasks.
Until there's a chance to get to the Dealer, it's a good idea to perform the At Home relearn for two reasons. 1. It might work, and 2. You can tell the Dealer that you've completed the first step in troubleshooting.
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Last edited by BBinTX; Apr 23, 2025 at 10:04 PM.



i agree you cancellled the G-wagen.... good choice.



TCU has been updated 2 times... one in cold and one when the transmission is hot.
Another one made to the transfercase.
was told by the general manager ... to drive the car in sport.....
once in sport.... the downshift is less felt... but still jerky.
waiting for a third try words of them.
already disscusin returning the car..
TCU has been updated 2 times... one in cold and one when the transmission is hot.
Another one made to the transfercase.
was told by the general manager ... to drive the car in sport.....
once in sport.... the downshift is less felt... but still jerky.
waiting for a third try words of them.
already disscusin returning the car..
i agree you cancellled the G-wagen.... good choice.



yesterday i found this document.
I'm actually scared of this...to expensive here that car in Panama. To new to be having transmission issues.
thing is... what car to choose. Cause usually when things happen... dealers dont give money back... they just tell us to choose another car from the lot.
https://static.nhtsa.gov/odi/tsbs/20...10669-0001.pdf



no especific name to the updates has been given to me. So i cant tell about standstill...or random.. or normal.
Ill have to talk to them again.. and ask for what specific update was given.
no especific name to the updates has been given to me. So i cant tell about standstill...or random.. or normal.
Ill have to talk to them again.. and ask for what specific update was given.
yesterday i found this document.
I'm actually scared of this...to expensive here that car in Panama. To new to be having transmission issues.
thing is... what car to choose. Cause usually when things happen... dealers dont give money back... they just tell us to choose another car from the lot.
https://static.nhtsa.gov/odi/tsbs/20...10669-0001.pdf








