JS NZ

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

NewportSLS

PM a forum member here Alexfor8 he will probably know what the issue is. Please report back with your outcome.

Vamz

How many miles on the car?

Is the car from authorized dealer?

JS NZ

25T kilometers now, I brought it from a well known dealer but not a Mercedes Dealer last December and have done around 3T km in it.

Sunline

I was just about to pull the trigger and trade my 2013 SL63 AMG for a 2012 Roadster with 6K miles on it. It shifted fine during my test drive but after doing extensive research on these transmissions it seems that they are well known for failure. The same transmission is used in the Ferrari 458, the new Ford GT, the California, the Mercedes GT and the SLS. Replacement is around 30,000.00 and may be the only option. Ferrari will sometimes rebuild them but that cost is nearly the same. I am getting cold feet even though I love the SLS and have wanted to upgrade into it for sometime.

Keep us posted on your outcome.

JS NZ

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.

LBMIAMI

jesus....I just bought an SLS....scary!

Sunline

There is a repair facility in New Jersey that will repair these Getrag transmissions.
Check out their website: exoticars-usa.com

JS NZ

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.

LBMIAMI

Sunline thanks.... hopefully I never need to.... will most likely get a warranty for it.

JS NZ

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.

NewportSLS

Thanks @JS NZ keep us updated. Hope for the best.

JS NZ

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.

NewportSLS

https://www.rennhaus.com/projects/fe...ission-rebuild

SLS and Ferrari California have the same box. Hopefully these are few and far between...

Abdelkarim Ben

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.
.....!

Hasoon Almail

[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.
.....![/

H

JS NZ

It appears the gearbox is fixed after a huge effort. A little more testing next week. I am going to remain silent on what the issue was but something very minor and very easy to fix. Finding the part/s was hard given Mercedes will not sell parts. Once confirmed I will disclose the company that did it. They are a firm with global reach and it is now their IP. so I will leave it to them. They did the hard yards. No more "new gearbox required"!!!