amgdaki

not aggressive but more of a jerked feeling whenever slowing down to a red light or stop sign, it is less jerky in sports+ but more in comfort? any idea on what this might be?

svtjocson

Did you get a tune recently or any service done? Try resetting the transmission adaptation

amgdaki

No haven’t done anything it’s all stock, i’ll try that thank you.

CaliBenzDriver

This is 99% caused by CAN-C latencies attributed to poor connections.
The tranny is a perfectly capable gearbox made bad by ESP + ISM that delay real-time collaboration between ECU <-->TCU. This is bad from factory. Adaptationsvarebsupposed to civer that but delays are random and banging are the norm.

When ECU works with TCU, you'll get perfectly amazing matched RPM shifts instead of sloppy-slippery.

Dont waste your time with adaptations, TCU dors that by itself real well over one thousand. Little by little crappy shifts are relearned to perfection.

AMGSIXTHREE

The MCT in my E63 was the same way. Very jerky when downshifting from 3rd to 2nd or 2nd to 1st.

I took it to the dealer and was told that was normal operation, but I've driven two other MCT cars and don't remember them being that way.

amgdaki

did you end up fixing it? if so how or what was wrong?

AMGSIXTHREE

Nope. They reset the trans adaptations but it didn't really change. Never figured it out before I sold the car.

svtjocson

Is there anything you can do about the bad ESP/ISM delay?

AMGSIXTHREE

I put 30,000 miles on my E63 and the harsh downshifts never got any better.

amgdaki

possible it could need a tcu tune

CaliBenzDriver

Yes, siry and free for me! I fixed my very own modules -
it's a cake walk for ESP with 4 tiny screws conveniently located for quick service. (ISM requires harvesting but 2 acrews are more challenging to get to.

I recommend ppl who want to experience this to tackle ESP cloning as a form of quick swap option if they are not confident with basic soldering skills.

Open the module solder two dozen of questionable joints - - - This will transform your banging power plant into a totally different powerful smooth car, for free.
Not only tranny shifts will be allowed to quit banging due to CAN-Bus delays *- BUT -* you'll also get Advanced GDI timings that were disabled by Bosch ECU <<< --- that one is going to make you smile every day you drive!

In combination with MOD-2.1 this has lead my Bosch ECU to enable richer more responsive GDI timings out of the blue because of normal" CAN datarates.

Sadly Bosch has this network setup with low bandwidth when it needs higher speed networking.
when ECU work hand in hand with TCU, the heavy chassis flies with perfectly rich/strong mixtures. The accelerator becomes "pressure sensitive" and the tranny: SEAMLESS.

CaliBenzDriver

​​​​​​It's built to be extra challenged by poor CAN-Bus data streams.

Luckily the tranny has many ways it knows how to shift gears. it's built to work rain or shine until it's last day.
Unfortunately fir us we are only familiar with it working poorly because of its messed up work environment.

When allowed to work "normally" well, that box is quite smart and nimble

+++ UNCONVENTIONAL FIX : LINK
Essentially what this means is to fix your slow poke gearbox, you do nothing to it (besides clean ATF) and only fix ESP (+ISM as needed). This Will Enable Perfect Timings.

Chris1953

I have a similar issue with the 2013 C63 AMG I just purchased (112,000 km). When cold it is bit of a pig but when warm it is not too bad. The downshifts from 5th to 4th or 4th to 3rd can result in a thud but that is all dependant on the rate of deceleration. If you slow gradually and creep to a stop it seems to be OK. If you slow quickly then it's clunky and when you get close to stopping it kind of surges slightly as it it's figuring out what gear it should be in. I'm just wondering if there is an issue with the wet clutch (or the transmission itself). I will check all the connections to the transmission the next time it's on the hoist.

Let's hope I've not bought a lemon.