Astolfo

+1 not talking about turbo lag but, gear engagement.

nikon

the only thing that mb had a problem with was the clutch and it was updated. The older ones were jerky and mb techs had a hard time adapting.

jvakos

Peter - the test scenario you describe here is exactly what high lights the 1/2 lag for the trans to respond after hitting the gas in my car. there is a slight jerk once the trans engages. i can actually mash the pedal nearly to the floor quickly in that 1/2 second and nothing happens.

with that said - if i come to a complete stop, let the trans engage in 1st and slightly roll then mash the gas it launches pretty good. not as good as race start or brake torque but at least no lag.

jvakos

Nikon - when you say "reset transmission adaptations" do you mean the ECU reset trick where you put the key to position 2 (not started) press accelerator pedal to kickdown and hold for 5 seconds, release pedal, then turn key to position 1 and wait 2-3 mins so the transmission adaptation is reset??? or how are you doing this?

PeterUbers

so, Sunil you still have the annoying jerk with stop and go. This is my point; your car wouldn't move at idle ... none of us had that problem ... my car moves at idle just fine. You had a different issue and I'm very glad it's fixed

your stop and go scenario is still my contention with this mct and that cannot be dialed out. If I let off the gas after being at a total stop and then allow a 1/2 second for gear engagement the I have no lag either.

the "I hit the gas and nothing happens" scenario still happens in your car. That's just an mct trait and I actually drive my car quite happily because my foot-brain has learned to account for that and this has made my driving experience more enjoyable

thanks for sharing Sunil

nikon

Disconnect the battery or use DAS

Amg63-

we confirmed the clutch was updated for the 15+ models.

I also saw that for the press release for the facelift 2015 cls63 MB did mention upgraded hardware/software for those year models.

Now your saying they made even further changes to
the MCT in mid-late 2016?

i wonder if a 2015 really feels any different than a late 16

nikon

it doesn't feel any different than a 2016.

Astolfo

I have both, a 2015 and a late 16. I drive both; both had the clutch and transmission adaptation, they do feel different but not by much but then it is my impression. The 15 is a little slower clunkerier than the 16, the 16 is as or nearly as fast as the 16 GTs' DCT I owned for a few months.


Also this is physical alignment (not talking about turbo lag) so resetting your ECU disconnecting the battery will not do it.


I am as sure as seeing in person at AMG the different parts of the 2015/16.

nikon

I'm not referring to turbo lag!
And yes I'm not referring to the physical alignment of the gears and clutch.
What parts have you seen that are different in the tranny of 2015/2016?

10speed

Yeah when I go from forward to reverse I have lag between changing, I think this is normal for this trans ?

EddieK

Well, dealership called back today to say everything was within spec and that no adaptation was needed. Guess I'll just have to deal with a clunky transmission.

nikon

Do a test drive with the shop foreman. Most of the times they look at the adaptation values through DAS. Is it clunkie when warm, cold, or both

EddieK

Both. Service manager said that it was normal operation of a wet clutch transmission. Said that the shop foreman drove the car extensively today and said that it drove 'normal.'

Amg63-

ok so basically every year the MCT clutch engagement improved from 14+??

from Worst to best it goes 14-15-16?

sunil517

Quote:
Originally Posted by gaspam
^ its even worse in reverse.... so many times i have put it in R trying to get out/ or into a parking spot quickly on the street and trans is like "hold please"

Yeah when I go from forward to reverse I have lag between changing, I think this is normal for this trans ?

It would take for ever to the car to engage in the gear selected.
That is now not the case with my car. I found this more when it was cold. I think I two issues related to the trans low ATF and the adaption fixed my issues. Now I have to pay more attention to lag engaging gears. At this point seem very fast. Cold/hot.
I am going to perform the test for Peter 5mph slow down and gas it.
Anyone is NYC PM me take it for a drive

PeterUbers

thank you Sunil

chiromikey

My lag time between reverse and forward gears was completely resolved with an overnight battery disconnect.

Astolfo

Just an FYI


My Original dealer MB of Seattle told me the exact same thing, then I worked MB of Bellevue and since they did not have a procedure we involved AMG. If there isn't another dealer then write to MB.


I showed my gratitude buy buying another wagon and GTs from MB of Bellevue and made a point to go and show the punks in MB of Seattle.

The important thing is to be able to repro, have videos, then send them. I even sent videos to AMG in Germany.

EddieK

Thanks for the info. When I get a chance I plan to go to another dealership. RBM of Atlanta is dead to me now.

sunil517

Cold Car in C mode into R car is rolling into D car is rolling no gas no delay.
Did a few N to R & N to D no issues with lagging of gear engagement.
Drove oil temp 90s water 140s C mode no issues in S+ would downshift to 1st and you don't feel anything at 5 MPH step on the car it goes, roll to about 5-7 it would go back into 1st. I am able to have in first in S+ and no rocking chair feeling. Once warmed S+ WOT to end of 4th off the gas and rolling all downshift were smooth 3 ,2,1 no jerking only the RPM would bump up at each shift.
What I did notice going into all the modes.. is that when I go from C to s to S+ the RMP is stable but when I go into M the RPM would bump up some.. Only in M. Before the dealer I would start the car and R and have to step on the gas to get it to move R or D.Now cold start R and rolling...

I now have my BMC filters in and no CEL... as of yet.
Now I m going to be looking at tires PSS or AS3+

PeterUbers

Glad it's all good now Sunil.

ajs76

Peter - I had the adaptation done and a tune, and I 100% still have the lag both at 0 mph when I stomp on it, and if I leave it in gear and slow down to 5mph and floor it. I have a 14 though, so posssibly that makes it worse.

The car is smoother through gears at any speed and way less jerky through parking lots...but the lag is real.

PeterUbers

thanks man

thats what I thought ....

sunil517

Hi AJ before the adaption,if you put the car into D/R no gas cold or warm does it start rolling on it own. My car never moved, you hand to give it gas.