I have about 1,200 miles on my new C63S coupe, and I've run into another problem. When in Sport or Sport+, with the transmission in automatic mode, my car often makes a hard kick-down from 2nd to 1st gear when coming to a stop. Sometimes I feel it shift down to 1st right after the car is completely stopped, but often it shifts down and kicks hard right before coming to a complete stop, jolting the car forward. It's pretty startling. Anyone else experiencing this on their new coupes? Any ideas why this is happening? (Note doesn't happen in Comfort since it stays in 2nd gear at a stop.) Thanks.

I had a faulty transmission in a BMW that did this. Try testing it be going to manual mode. Slowly come to a stop in 2nd. Then switch to 1st. Does it jolt then? Then it's a problem.

I have the sedan and it does the same thing if you are slowing down i was just guessing that is how the tranny is since it is a very interesting transmission.

It did not jolt when downshifting manually from 2 to 1 upon slowing to a stop. Not sure if this is expected behavior or if there is any issue/defect.

My 2015 does the same only in sport+, it doesn't do it all the time I noticed it kicks hard based on the braking I think based on breaking pressure it down shift harder to help decelerate (like down shifting in a manual)... maybe just in my head.

slow all the way to a stop in 2nd gear, then once it's stopped go into 1st. My broken ZF transmission would jolt then, indicating a problem.

happens to me all the time. when in S+ there will be a kick from 2nd to 1st if I'm slowing down gradually.

hmmm same with me , I did upgrade the gear box with S ok only with S+ from 2nd to 1 happened to all car

My 2015 Sedan did the same thing in Sport, but it went away after the first 1000 miles. Now my Coupe, with 290 miles on the clock does the same thing in Sport only. Both cars would jolt or clunk once i was already stopped. Not a big deal and hoping it goes away on my coupe like it did on the sedan.

My 2015 sedan did that all the time.

However, on my 2017 coupe this does not happen.

Are you driving it hard then coming to a full stop?

I have close to the same problem i just get it when im in manual mode up shifting 3rd to 4th it'll jolt.

No, gradual stop. And it's intermittent. Sometimes it shifts down to 1st after the car has stopped moving, and I can barely feel it. That I suspect is the normal operation, expected behavior. Other times, right before the car comes to a full stop, it kicks down hard and jolts the car forward.

Here are a couple videos. Easier to see/feel in person. Watch the gear indicator go from 2 to 1. Whole car jolts. You can see my iPhone shake. This cannot be normal behavior, and the car just started doing this last weekend. Since, it's intermittent. For example, didn't do it tonight.

Ok, that's definitely not normal.

My car used to drop to 1 hard but I was still rolling and coming to a stop - not already stopped. Looks like some sort of delay in the gear change... also not sure why its kicking down so hard I can see the jolt.

I would take back to dealer and show the video not normal, I had the same problem on my 2007 335i when I had it started doing this at 70k would only jolt in sport mode had to take guys who came over from BMW Germany to show them the fault as they could not reproduce. They ended up replacing the gear box. Try and get some more info like engine temp how long you have been driving type of driving style etc when it happens to try and make it easier to reproduce by techs.

Mine does the same thing, and its brand new (3 days).
Sounds like they have a bit of software tweaking still to do.

I experienced the same thing when I had my GLA.
The car was selecting 1st gear just before you come to a complete stop with a jolt.
After the update, the car would select 1st gear after a complete stop.

Granted they are not the same boxes.

Watched the videos

this is the same sh-t that motivates me to force Benz into buybacks on two 2014 e550's

love it that Benz still can't get it right for some

Unfortunately MB is the furthest behind in terms of their transmission technology (in regard to the other german car manufacturers).

They are a generation behind and that's being generous.

I have this exact problem as well. Not every single time but most of the time.

Update: After replacing the valve body and TCM, and applying a software update, the issue still exists with the transmission. Tomorrow they will make the call, but today my SA told me it looks like they're going to have to replace the transmission.

went down this same road ... next comes the buyback when you realize your brand new car has had major surgery and just doesn't feel the same

Update: The technician has been working with MB Engineering on different road trials, sending results, and getting back software tweaks to apply. They just installed another update yesterday, and it's still shifting hard (sounds like could be worse than the original issue I reported). My case is now being escalated to Daimler Engineering in Germany, whatever that means. Could be another week he said. Been two weeks so far as of today. They are convinced it's software and not mechanical. FML.

Sorry to hear that mate... hope they can figure it out soon. Personally, I would start complaining even more and see if they can switch you over to a new car.

At this point, that's a real possibility, even according to my service adviser. I left another voicemail for my contact at MBUSA (Lois) this morning, and shocker, she never called me back. Worst customer service ever. That's two voicemails in two weeks with no call back.

Tell them you know at least one forum member (me) who will cancel his February purchase order if this **** doesn't get fixed for you soon or gives you a satisfied answer.