C63 W205 2015 Gearbox problem - intermittent harsh shifts
Thread Starter
Junior Member
Joined: Dec 2018
Posts: 16
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W205 2015 4.0
C63 W205 2015 Gearbox problem - intermittent harsh shifts
Hello,
One of my first posts here, I had my car for about 6 months now and I have to say I quite disappointed with the way it shifts. When I got the car the gearbox seemed to be totally confused about what it needs to do and there was significant clutch judder. I took it to Main Dealer for diagnosis and after 7 days they couldn't find anything but they updated the software. This helped the judder when the clutch slips (mostly on comfort) was gone and the gearbox seems to know when to change gears.
5 months later I am concerned again, in the recent cold weather, my problem happens at least 2 times a week. Sporadically, when the car warms up after 10 minutes of driving the gear shifts become very harsh. It seems like the gear changed and the clutch slams together, there is a perceivable loss of driver followed by a hit of torque to the wheels (This happens in C,S, S+ and M ) it's actually quite dangerous in slippery conditions as it cause the wheels to lose traction!!
I found to fix the problem when I stop the car and turn off and back on the engine (ignition cycle) the problem disappears gear-shifts become quick and smotth as they should be during normal operation.
To me, it seems it must be some sort of clutch control adaptation or some sensor going bad? Does anyone have similar problems with the MCT clutch / transmission?
Thank you
One of my first posts here, I had my car for about 6 months now and I have to say I quite disappointed with the way it shifts. When I got the car the gearbox seemed to be totally confused about what it needs to do and there was significant clutch judder. I took it to Main Dealer for diagnosis and after 7 days they couldn't find anything but they updated the software. This helped the judder when the clutch slips (mostly on comfort) was gone and the gearbox seems to know when to change gears.
5 months later I am concerned again, in the recent cold weather, my problem happens at least 2 times a week. Sporadically, when the car warms up after 10 minutes of driving the gear shifts become very harsh. It seems like the gear changed and the clutch slams together, there is a perceivable loss of driver followed by a hit of torque to the wheels (This happens in C,S, S+ and M ) it's actually quite dangerous in slippery conditions as it cause the wheels to lose traction!!
I found to fix the problem when I stop the car and turn off and back on the engine (ignition cycle) the problem disappears gear-shifts become quick and smotth as they should be during normal operation.
To me, it seems it must be some sort of clutch control adaptation or some sensor going bad? Does anyone have similar problems with the MCT clutch / transmission?
Thank you
Junior Member
Joined: Jan 2019
Posts: 42
Likes: 7
C63
Hello,
One of my first posts here, I had my car for about 6 months now and I have to say I quite disappointed with the way it shifts. When I got the car the gearbox seemed to be totally confused about what it needs to do and there was significant clutch judder. I took it to Main Dealer for diagnosis and after 7 days they couldn't find anything but they updated the software. This helped the judder when the clutch slips (mostly on comfort) was gone and the gearbox seems to know when to change gears.
5 months later I am concerned again, in the recent cold weather, my problem happens at least 2 times a week. Sporadically, when the car warms up after 10 minutes of driving the gear shifts become very harsh. It seems like the gear changed and the clutch slams together, there is a perceivable loss of driver followed by a hit of torque to the wheels (This happens in C,S, S+ and M ) it's actually quite dangerous in slippery conditions as it cause the wheels to lose traction!!
I found to fix the problem when I stop the car and turn off and back on the engine (ignition cycle) the problem disappears gear-shifts become quick and smotth as they should be during normal operation.
To me, it seems it must be some sort of clutch control adaptation or some sensor going bad? Does anyone have similar problems with the MCT clutch / transmission?
Thank you
One of my first posts here, I had my car for about 6 months now and I have to say I quite disappointed with the way it shifts. When I got the car the gearbox seemed to be totally confused about what it needs to do and there was significant clutch judder. I took it to Main Dealer for diagnosis and after 7 days they couldn't find anything but they updated the software. This helped the judder when the clutch slips (mostly on comfort) was gone and the gearbox seems to know when to change gears.
5 months later I am concerned again, in the recent cold weather, my problem happens at least 2 times a week. Sporadically, when the car warms up after 10 minutes of driving the gear shifts become very harsh. It seems like the gear changed and the clutch slams together, there is a perceivable loss of driver followed by a hit of torque to the wheels (This happens in C,S, S+ and M ) it's actually quite dangerous in slippery conditions as it cause the wheels to lose traction!!
I found to fix the problem when I stop the car and turn off and back on the engine (ignition cycle) the problem disappears gear-shifts become quick and smotth as they should be during normal operation.
To me, it seems it must be some sort of clutch control adaptation or some sensor going bad? Does anyone have similar problems with the MCT clutch / transmission?
Thank you
Must be a fault as resets with ignition cycle
Sorry for stating the obvious
Good luck
Last edited by Behind The Bibs; Feb 2, 2019 at 07:14 PM. Reason: spellings
Thread Starter
Junior Member
Joined: Dec 2018
Posts: 16
Likes: 0
W205 2015 4.0
I had no luck dealer said no fault found ... does anyone know how to reset the gearbox adaptation settings?
I found this sequence:
can any one verify this works on c63 w205? Also I have keyless option so I gues I need to take out the silver button from the ignition?
I found this sequence:
- Turn ignition on but don’t start
- press pedal to the floor and hold it 5 seconds
- turn car off but keep the key in the ignition for 20sec.
can any one verify this works on c63 w205? Also I have keyless option so I gues I need to take out the silver button from the ignition?
Super Member
Joined: Dec 2011
Posts: 557
Likes: 71
2016 C63S
This just happens to me today. Cold day out (30°) but never had anything like it before, even this morning when driving to work.
Exactly as described here, particularly in Sport +, under medium throttle, the car pauses and then abruptly up shifts with a jolt.
I realize this thread is a bit old but I don’t see any relevant newer ones.
Exactly as described here, particularly in Sport +, under medium throttle, the car pauses and then abruptly up shifts with a jolt.
I realize this thread is a bit old but I don’t see any relevant newer ones.
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Super Member
Joined: Nov 2016
Posts: 568
Likes: 132
2007 E350
mine shifts/jolt forward in sport plus mode when coming to a slow stop from 2nd to 1st in auto mode. Ever since I got it tune. other than that, no harsh shift in any other gear and mode. I usually keep it in m mode in sport plus to avoid it
Member
Joined: Jul 2015
Posts: 118
Likes: 14
C63 Coupe
This is definitely a brand new issue for me I’ve owned the car for 3-4 years and it happens in every mode on the 2-3 upshift. I tuned back to stock same thing, tried the tcu reset a couple times no change and disconnected the battery for a few hours with no change. I’m fairly sure it’s a mechanical issue, just praying it’s low on transmission fluid or something easy. I had that done about 2 years ago maybe a bit more
for what it’s worth I bought the car with about 24k, did the transmission service at probably 28 along with a few other things and I’m now sitting at about 32k
for what it’s worth I bought the car with about 24k, did the transmission service at probably 28 along with a few other things and I’m now sitting at about 32k
Last edited by gforc3; Oct 20, 2024 at 11:09 PM.
