Repost of problem that no one seams to be able to figure out or even guess at!
Thread Starter
Junior Member
Joined: Mar 2021
Posts: 42
Likes: 4
Cl63 AMG
Repost of problem that no one seams to be able to figure out or even guess at!
Car is 09 CL63 AMG 87,000 miles full MB history but no evidence of a gearbox oil change
Ok so back to an old issue that despite visiting several amercedes specialist AND Auto Box Specialist no one wants to commit to a fix.
So here goes.
Symtoms.
NO fault codes in gearbox.
Any speed or rev range a SLIGHT touch of the throttle results in a violent judder/shudder that feel like its coming from the middle (just forward of the centre are rest) OR rear left. Described as driving over a cattle geid or rumble strip. Does it in sport, comfort, but less so in manual. Lots worse on an incline and lots worse at lower revs.
The other morning we had a slight frost, i started the car and let the womdows defrost, the car was in comfort, put into drive and before i could get my foot of the break the car lurced forward and stalled. This happend twice. It also did it on reverse. Tried to go from neutral to drive and it stalled. Put it in sport a few mins later and it still lurced but managed to get my foot of the brake and get going. This morning not as cold and i got away first time. One its been run it doesnt do it again on start up.
On wide open throttle there is NO issue it pulls hard.
The car has NO missfire, as thats what a few people thought and to be fair it did have a missfire. I baught this car to keep, icknow they are money pits but hey, you cant take it with you! So to fix the missfire i replaced both intake gaskets, all inectors, all spark plugs and oil breather and all Coils (coils i could if got under warrenty but im inpatient!)
An abs sensor was down so that has also been replaced.
Drove train we have changed the centre prop bearing and had it balanced. Both of the other 2 prop fixing look relatively new.
Gearbox oil level is ok.
Now given what happend to me in the morning its deffinatly making me go gearbox. But no one wants to commit to what it is in the box. I still say torque converter.
Here is a vid. While its not very loud on the vid beleve me when i say in the car just imadgen youve gone over a rumble strip at 70 and feels like a cattle grid at 80! Also not when it does it the revs rise ever so slightly before going back down.
https://youtu.be/cD_woCKOwy4
Ok so back to an old issue that despite visiting several amercedes specialist AND Auto Box Specialist no one wants to commit to a fix.
So here goes.
Symtoms.
NO fault codes in gearbox.
Any speed or rev range a SLIGHT touch of the throttle results in a violent judder/shudder that feel like its coming from the middle (just forward of the centre are rest) OR rear left. Described as driving over a cattle geid or rumble strip. Does it in sport, comfort, but less so in manual. Lots worse on an incline and lots worse at lower revs.
The other morning we had a slight frost, i started the car and let the womdows defrost, the car was in comfort, put into drive and before i could get my foot of the break the car lurced forward and stalled. This happend twice. It also did it on reverse. Tried to go from neutral to drive and it stalled. Put it in sport a few mins later and it still lurced but managed to get my foot of the brake and get going. This morning not as cold and i got away first time. One its been run it doesnt do it again on start up.
On wide open throttle there is NO issue it pulls hard.
The car has NO missfire, as thats what a few people thought and to be fair it did have a missfire. I baught this car to keep, icknow they are money pits but hey, you cant take it with you! So to fix the missfire i replaced both intake gaskets, all inectors, all spark plugs and oil breather and all Coils (coils i could if got under warrenty but im inpatient!)
An abs sensor was down so that has also been replaced.
Drove train we have changed the centre prop bearing and had it balanced. Both of the other 2 prop fixing look relatively new.
Gearbox oil level is ok.
Now given what happend to me in the morning its deffinatly making me go gearbox. But no one wants to commit to what it is in the box. I still say torque converter.
Here is a vid. While its not very loud on the vid beleve me when i say in the car just imadgen youve gone over a rumble strip at 70 and feels like a cattle grid at 80! Also not when it does it the revs rise ever so slightly before going back down.
https://youtu.be/cD_woCKOwy4
Super Member
Joined: Dec 2015
Posts: 502
Likes: 145
From: Tampa Bay, FL
2014 E350 Wagon, 2009 SL550 no ABC
Check if all ABC suspension sensors and arms which pull/push on the sensors are bolted tight. I had one of those loose and the car would unexpectedly jerk on slight body movements (acceleration/slowing/changing lane) but without a clear pattern, so it took me a while to find the problem. As the car position sensed by ABC computer rapidly changed, ABC responded violently.
If the problem is clearly from the drive train the reason could be different, but checking bolts is simple enough to do anyway. Good luck.
If the problem is clearly from the drive train the reason could be different, but checking bolts is simple enough to do anyway. Good luck.
Super Member
Joined: Dec 2015
Posts: 502
Likes: 145
From: Tampa Bay, FL
2014 E350 Wagon, 2009 SL550 no ABC
Also regarding misfires - a Mercedes can have undetected misfires which don't show up on any error readouts and don't trigger CEL. The way to check is to monitor "real time" counts in DAS with engine running/driving. Misfires may be occurring and clearing/timing out without any notifications if they occur at certain slow patterns. But they can still be causing very slight jerks of the car.
Junior Member
Joined: Aug 2018
Posts: 16
Likes: 1
C63S Cabrio
My car: C63S Cabriolet 2018 7-speed gearbox
- Candles replaced (not solved the problem) The candles were in poor condition 2 were burned out.
- Reel change n ° 5/6 (it seems that the problem is solved .. I look forward to test better)
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MBWorld Fanatic!
Joined: Sep 2018
Posts: 3,243
Likes: 932
From: New Orleans Area
2015 E400 Sedan
Just because no tranny codes does not mean it could not be a Tranny issue.
I have looked but there was great article in some transmission repair magazine how some guy in Northeast found issue with oil draining out of something in TC which would cause shudder and all sorts of other issues.
IT did not throw a code.
I cannot find now read it 2-3 weeks ago.
I have looked but there was great article in some transmission repair magazine how some guy in Northeast found issue with oil draining out of something in TC which would cause shudder and all sorts of other issues.
IT did not throw a code.
I cannot find now read it 2-3 weeks ago.
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Junior Member
Joined: Aug 2025
Posts: 15
Likes: 0
My 18 c63s is doing the same exact issue of stutter on light acceleration, i think that it is the fluid that has never been serviced in mine or at least that i know of. I have high miles and never had an issue until recently.
I am going to try to have trans serviced with new fluid and filter etc and have adaptations reset and see if that improves anything.
Does anyone have any new info or possible clues on a fix??
I am going to try to have trans serviced with new fluid and filter etc and have adaptations reset and see if that improves anything.
Does anyone have any new info or possible clues on a fix??
Junior Member
Joined: Aug 2025
Posts: 15
Likes: 0
Junior Member
Joined: Aug 2025
Posts: 15
Likes: 0
i am currently 110k miles, no records of fluid changed. I think that is best route to go. I am sure my fluid is black as midnight and probably been cooked with plenty of contaminations over the years and miles. Then adaptations should help with the clamping pressure since that is the issue of slipping
Have you tried any fixes yet?
Newbie
Joined: Aug 2025
Posts: 15
Likes: 1
Mercedes-AMG CLS 63 S 4MATIC
You should perform a gearbox adaptation. First reset the values and then do new adaptations. The procedure takes about 1h - 2h and you should drive with the shown instructions (rpm) and the software will do it's thing. You need Xentry for that, and someone on the passenger seat.
Banned
Joined: May 2010
Posts: 1,209
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S65
I have not, since I'm very proactive about maintenance and don't neglect gear boxes and engines. I change engine oils every 3000 to 4000 miles. Transmissions get done at around 20k to 25k. Differentials every -30k. ABC evey -15k or 3 oil changes. Brake fluid every year. I run Evans coolant, good for 500K miles. As such, I don't have any of the aforementioned issues.
