SLS/R197/C197 AMG: DCT CEL Transmission Pressure Implausible
Thread Starter
Junior Member
Joined: Nov 2019
Posts: 34
Likes: 8
SLS Roadster, S500, Jag XJ V8 SC
DCT CEL Transmission Pressure Implausible
Hi,
I have a 2012 roadster and got a CEL that said "transmission pressure implausible". The car then went into limp mode, I was still able to change gears. If I turned off the car for a while and came back the fault would clear then reestablish after say 20 minutes of driving. Mercedes has said the only fix is to replace the whole DCT.
Has anyone got any experience or thoughts or advice with this.
Thanks in advance, John
I have a 2012 roadster and got a CEL that said "transmission pressure implausible". The car then went into limp mode, I was still able to change gears. If I turned off the car for a while and came back the fault would clear then reestablish after say 20 minutes of driving. Mercedes has said the only fix is to replace the whole DCT.
Has anyone got any experience or thoughts or advice with this.
Thanks in advance, John
Member
Joined: Dec 2012
Posts: 93
Likes: 20
From: Ashburn, Virginia
2014 SLS AMGGT Roadster
Hi,
I have a 2012 roadster and got a CEL that said "transmission pressure implausible". The car then went into limp mode, I was still able to change gears. If I turned off the car for a while and came back the fault would clear then reestablish after say 20 minutes of driving. Mercedes has said the only fix is to replace the whole DCT.
Has anyone got any experience or thoughts or advice with this.
Thanks in advance, John
I have a 2012 roadster and got a CEL that said "transmission pressure implausible". The car then went into limp mode, I was still able to change gears. If I turned off the car for a while and came back the fault would clear then reestablish after say 20 minutes of driving. Mercedes has said the only fix is to replace the whole DCT.
Has anyone got any experience or thoughts or advice with this.
Thanks in advance, John
Keep us posted on your outcome.
Thread Starter
Junior Member
Joined: Nov 2019
Posts: 34
Likes: 8
SLS Roadster, S500, Jag XJ V8 SC
So no real update, the car is still at the dealer. It has taken 2 weeks to attempt to get them to complete a transmission flush and fluid change. Also I got called by one guy saying maybe I couldn't afford to fix it for USD$16T. I complained to the dealer about this and they asked me for his name. I didn't have that name but his accent(South African) so told him that. No further action from that. MB NZ is uncontactable in that there is no way for a consumer to contact them. It truly is a **** show.I will post a new thread on the service issue.
Trending Topics
Member
Joined: Dec 2012
Posts: 93
Likes: 20
From: Ashburn, Virginia
2014 SLS AMGGT Roadster
MB World Stories
The Best of Mercedes & AMG
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun
Verdad Gallardo
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Verdad Gallardo
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine
Verdad Gallardo
Flawlessly Restored Mercedes 190E Evo II Heads to Auction
Verdad Gallardo
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know
Verdad Gallardo
Mercedes EQS Gets A Major Update: Everything You Need to Know
Verdad Gallardo
5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve
Verdad Gallardo
Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping
Verdad Gallardo
10 Most Reliable Mercedes-Benz Models You Can Buy Used
Verdad Gallardo
Thread Starter
Junior Member
Joined: Nov 2019
Posts: 34
Likes: 8
SLS Roadster, S500, Jag XJ V8 SC
Thanks,
Still waiting for the fluid work. The dealer didn't even have the fluid and had to order it in. Maybe that is why they were so reluctant. I think the fluid comes in 20 gallon drums. Speculating they didn't want to be left with the balance.
Still waiting for the fluid work. The dealer didn't even have the fluid and had to order it in. Maybe that is why they were so reluctant. I think the fluid comes in 20 gallon drums. Speculating they didn't want to be left with the balance.
Thread Starter
Junior Member
Joined: Nov 2019
Posts: 34
Likes: 8
SLS Roadster, S500, Jag XJ V8 SC
So a big update on this issue.
I got the fluid report back, it was fine ie no contaminants. But I struggled to get MB to do the fluid change so went to a Ferrari dealer to do that. The difference between the two dealer approaches was like night and day.
The fluid change did not fix the issue.
I tracked down an indie who has worked on these boxes. On its review of the issue they have found it may not be a transmission issue at all. What it has found is there is a serious manifold intake leak on the left back. How did they do this? They thought they could hear a leak so checked the lambda 02 and majico! left bank screwed. The graphs showed it very clearly. They suspect that this is then screwing with the sensor references.
So first thing is replace the manifold, noting MB has replaced the original part number with an new part number as the part was changed. 10 week order timeframe apparently for the part.
If this is the problem this will be a revelation as MB wanted me to replace the whole transmission for circa US$17T and if this is the issue that wouldn't have done anything. The indie hasn't guaranteed that this is the issue btw just highly suspects it. The manifold needs to be fixed anyway. That is still going to be USD$6T.
Will update after the replacement.
I got the fluid report back, it was fine ie no contaminants. But I struggled to get MB to do the fluid change so went to a Ferrari dealer to do that. The difference between the two dealer approaches was like night and day.
The fluid change did not fix the issue.
I tracked down an indie who has worked on these boxes. On its review of the issue they have found it may not be a transmission issue at all. What it has found is there is a serious manifold intake leak on the left back. How did they do this? They thought they could hear a leak so checked the lambda 02 and majico! left bank screwed. The graphs showed it very clearly. They suspect that this is then screwing with the sensor references.
So first thing is replace the manifold, noting MB has replaced the original part number with an new part number as the part was changed. 10 week order timeframe apparently for the part.
If this is the problem this will be a revelation as MB wanted me to replace the whole transmission for circa US$17T and if this is the issue that wouldn't have done anything. The indie hasn't guaranteed that this is the issue btw just highly suspects it. The manifold needs to be fixed anyway. That is still going to be USD$6T.
Will update after the replacement.
Thread Starter
Junior Member
Joined: Nov 2019
Posts: 34
Likes: 8
SLS Roadster, S500, Jag XJ V8 SC
Hi,
So finally getting to the bottom of this. And I hope Mercedes see this. Pressure plate is no good after 23 T km( that is when the fault first emerged). New gearbox required. Intake manifold bent. New manifold required. Don't ever buy this car. Just go and buy a Ferrari. I never had issues like this with those. What a loser of car.
So finally getting to the bottom of this. And I hope Mercedes see this. Pressure plate is no good after 23 T km( that is when the fault first emerged). New gearbox required. Intake manifold bent. New manifold required. Don't ever buy this car. Just go and buy a Ferrari. I never had issues like this with those. What a loser of car.
Last edited by JS NZ; Oct 24, 2020 at 02:15 AM.
MBWorld Fanatic!
Joined: Mar 2015
Posts: 1,518
Likes: 191
SLS AMG
https://www.rennhaus.com/projects/fe...ission-rebuild
SLS and Ferrari California have the same box. Hopefully these are few and far between...
SLS and Ferrari California have the same box. Hopefully these are few and far between...
Newbie
Joined: Dec 2020
Posts: 2
Likes: 0
C 63
Same dtc
Hello everyone
Actually I have same problem with GTs mb.
I check everything in engine; turbos, pipes, hoses, intercoolers, I didn't remove the intake manifold coz it's looks good I check it only from intercoolers side.
This really broke my head.
What can I do really I don't know.
.....!
Actually I have same problem with GTs mb.
I check everything in engine; turbos, pipes, hoses, intercoolers, I didn't remove the intake manifold coz it's looks good I check it only from intercoolers side.
This really broke my head.
What can I do really I don't know.
.....!
Newbie
Joined: Jan 2021
Posts: 1
Likes: 0
sls 2011
Hello bro your problem with the transmission you have to change it or you have to fi
[QUOTE=Abdelkarim Ben;8238405]Hello everyone
Actually I have same problem with GTs mb.
I check everything in engine; turbos, pipes, hoses, intercoolers, I didn't remove the intake manifold coz it's looks good I check it only from intercoolers side.
This really broke my head.
What can I do really I don't know.
.....
