ahesq

I have a 2018 c63S coupe. Now that winter is here and it has become cold overnight, I have noticed that when I start up in the morning and put it in drive (2nd gear start in comfort mode), it revs but it doesn't actually move forward for a moment until it kicks into gear the first time, and thereafter it drives just fine.

Is this normal for the 7 speed MCT in cold weather? Only happens when overnight temps get below 40 degrees and only on first start up and very first engagement into drive

Thanks

Modio1234

It is normal my car has done it since it was new and I know many others have as well.

lyjw88

yea mine does it too

auditoamg

They all do it, but I don't think it's normal. Too much clutch being burned. Dealer has attempted fix as they agree... Fix still in process but problem for me has gotten worst.... Even in reverse.

RDOCA

I think it is normal so just give it a little time after putting it into gear before trying to move away.
The oil is quite thick and it takes some time for it to fill all the passages of the valve body and the clutches.(remember there are clutch packs in the trans in addition to the multi plate pack replacing the torque converter)
After starting wait 30 sec to a min and then put in rev to back out of garage and wait 5-10 sec before moving and when ready to go forward wait another 5- 10 sec and that is the last time for the day needed to do it unless it sits out in very cold weather.

OrientBlue3

Mine does the same thing. Always wondered if it was normal.

BrownDog09

It's normal. If you're in comfort mode the car starts in 2nd gear. If you've ever driven a manual you'll know the feeling of starting the car off in second vice third gear.

Kick the car into any other drive mode other the comfort - problem solved. No need to stress, the car is all good.

AMGSuperSaloon

Just curious, do you disengage the parking brake before putting the car into gear? I've noticed that if you leave the parking brake on and put it into gear the car will take the parking brake off for you, but there is a hefty lag between giving the car some throttle and the first forward motion. This may be overly simple and you may already be taking the parking brake off, but just an idea.

auditoamg

I only drive in sport+ and it still happens... This is why I'm convinced it's not normal. I always wait until RPMs stabilize before shifting into any gear first start of the morning, especially.

RDOCA

What is the temp and how long do you wait till you shift into gear and how long so you wait till you try to move?? cold oil means you should give it a little longer . Remember this trans is diff than either a fluid coupling or a dual clutch.

BrownDog09

Then agreed. That does not sound normal as my '18 coupe does not perform that way. Granted, I'm in Charleston, SC and it's 70 degrees in November.

Possible that it's a software issue and can be easily resolved. Keep us posted.

auditoamg

2-3 minutes, until the RPMs come down to idle.
Then at least 5 seconds after putting the car in gear....

KJ

Mine does the same, it's OK after things warm up.

Also, sometimes the electronic parking brake kicks in automatically, but if you gas it hard enough, it will release automatically. This could also be what you are experiencing.

ahesq

It's not a parking brake "delay" issue.

Yes, I do wait until the idle comes down before going into reverse out of the garage. Reverse doesn't seem to be an issue at all.

It's only on first engagement in drive on a COLD morning that it delays engagement and slips/revs for a few seconds, until it catches.

After that first initial "catch" into gear going forward, no issues.

C63_Ed1

Same here, taking off from a cold morning start the car dosent actually move until around 3,000 rpm. Almost like your riding the clutch in a manual car. I only drive on sport+ and allow the car to warm up for more than 5 minuts before driving, plus give time for the rpms to stabilize in gear before taking off.

crocoss

Those of you who live in extreme cold conditions, Please allow 3-5 minutes warm up before you drive off for the sake of engine and tranny and don't listen to the 30 sec warm up bullsh*t.

C63_Ed1

I live in Los Angles, California. Doesn’t get too cold down here, around 50 degrees(F) the lowest on a very cold night. Plus I allow my car to warm up well over 5 minuts after a cold start. My tranny and engine temps are in the 80s before I take off. Still having the same issue, dosent seem to be a an ongoing problem though, because as soon as the temps reach closer to 100 I don’t feel the slippage of the transmission anymore.

elp_jc

That happened to me when I rented a C63 sedan not long ago (in cali). It felt exactly like somebody said: like 'riding' the clutch in the friction zone, but not releasing it completely. Got the car up to about 3K rpm, and nothing. Didn't feel good, so stopped. The DCT on my Porsche has never done any of that. Anyway, then decided to just gun the throttle with the left foot on the brake (if necessary), and it finally caught. And it wasn't cold at all; maybe high 60s, and only slightly uphill backing up. That tranny is my main concern about these cars. Still undecided; need to test an E43 (and E400 coupe with airmatic) to make the call.

DSawyer63

You can make the cold clutch engagement a little better by doing a clutch adaptation procedure. Basically do 15+ slow stop starts right when the the engine and transmission are still cold. This will help it learn where it needs to engage when the fluid is still cold. My car does this too, especially after I do hard launches at the drag strip. An adaptation always helps for me.
Doug

td328

i have a 0ctober build 2016 c63s coupe and I have the same issues' Mercedes say its not normal and could not fix it so they involved Mercedes Germany and they same they seemed stumped. so the first defensive question to the dealer was check the car for any modifications so they could walk away.
there was none so over the course of 3 to 4 weeks they tried software fixes that did not work then came the resetting of the adaption points on the cluthpack that didn't solve it then came readaption points on the ENGINE after injector values were taken and sent to Germany. I got the car back improved but not fixed then a month later took it back and further readings and values sent to Germany and the response was to change injector no.2 on the engine as the values were to high. very confused on how it is all connected I am still waiting for a fix as I still have the problem. I have asked them to have a definite fix before I give them the car again.. anf further to that my stop start dosent work either not that its a problem as I never use it.

nobbyv

Mine car does this too; I also drive in Sport so it's not related to starting in 2nd gear. Seems normal to me.

Chino075

This is normal, I have a 2018 and it does it in drive and reverse (sport mode). Once I drive it, about 3 - 5 mins it then starts in 1 all depending on how cold is outside. Letting it idle yields no effect as I've had it remote started for 5 mins vs driving for 5 mins to test it out, and driving is what warms it up.

auditoamg

White C400

Damn yea mine does it too just got my 2018 c63s coupe have 400 miles on it now and every time I start it up and put it in gear for the first time it revs to a little over 2k maybe 2500 before it engages. It's not just in the cold either because it was 88 here today and it did it. It does get better after a couple more stop starts. So I guess I'll call my dealer and have them document it just in case something happens down the road.

auditoamg

Can you send me a video of yours doing it and maybe your VIN after you report it? Mercedes just voided my warranty and refused buy back.