I have a 2019 e63s and i have been experiencing harsh downshifts but only when in automatic and in comfort mode. Has anyone had a similar experience?

 

Harsh downshifts is widely prevalent in most modern Benz 722.9 and beyond adaptive transmissions. It's extensively discussed on these forums. However it is not commonly discussed in this specific w213 amg forum.

- what downshift is most prevalent for harshness (4-3, 3-2)
- have you reset the tcu learned adaptations
- are you tuned?
- how long have you owned the car and has it only recently been doing this?
- has the trans fluid been serviced (due at 30k intervals)
- is it more prevalent in c, s, or s+ modes? Typically comfort should be the most smooth of course so it's odd that it's happening in C

in the sticky starting here at this link you can review discussions on not smooth shifting
https://mbworld.org/forums/w213-amg/...ml#post9027912

 

I have a 2020 e63s with 28k miles. For a couple months I've also experienced harsher downshifts in C mode. Its not hard by any means but shifting in C should be very smooth. It downshifts as if it was in S+ mode just less aggressively. I just came back from getting my Service A and they tested the car and couldn't recreate my issue. No error codes or nothing. Replaced the battery, thinking maybe it was that. Oil. etc. I also replaced my transmission fluid back at 21k miles. For a couple days after service A its been smooth but the issue is slowly coming back I believe

 

It is mostly prevalent when shifting down from 3-2.
I am stage 1 with a cpc tune and tcu tune
I have owned the car for around 5 months and i have noticed it almost immediately.
I just got the transmission serviced but it has not changed anything.
It only happens in comfort mode when decelerating

 

Did you ask the supplier of these tunes what you are to expect from shifting? Its my experience with TCU tuning that shifts became more direct, but also harsher when being driven mellow. My experience is not in this platform, but since you are not stock, I would not expect stock performance. Have you tried running stock files or was this tuned before your purchase? If you are the owner that tuned the car, what did it feel like before tuning?

 

The car came with the tunes from the previous owner so i don't know what the car is supposed to feel like stock. I just think it isn't normal as it feels out of the ordinary

 

Sadly the first thing to do is take it all completely
back to stock