trbo2nr

My 2004 C32 has this problem and I have the following installed (below) and it
happens exactly like you explained.

Fast55

Victor,
While I don't doubt for a minute that you've identified a real problem, is it possible that some who think they have this issue are really just getting a rather harsh clutch engagement? Mine was pretty bad when stock and has only gotten worse since modifiying the car.

phatmitzu

That's what I was thinking as well. I'm pretty sure what I am experiencing is the supercharger clutch.

e55 baller

I just pulled the codes of my car and found all but the code above. I do not think MB ever did the secondary air injection system. I was vigilant about this recall not happening and declined it in writing.

I will get the HW# and SW# tomorrow. For some reason I could not get the car into dyno mode (was following Juice's youtube video).


3 codes I found --

p0410 - secondary air injection system malfunction (I asked that this NEVER be fixed by Benz)

p0730 - gear ratio incorrect - WTF is this?? Related to slipping trans?

p0128 coolant temp below thermostat regular temp. Could it be because its 10 degrees out and I have a the t-stat mod?

e55 baller

I have the harsh supercharger clutch engagement with the biggest pulley around and its nothing like this issue. It can happen at any speed and it seems worse from higher speeds like 60-75 mph. Some times it happens so much I dread giving the car gas knowing its going to happen. It can feel like someone just did a neutral drop in the car with engagement, disengagement and harsh reengagement of the transmission.

Marcus Frost

Fast I've had 2 E55s now, and without being disrespectful, it is not possible for it to be harsh supercharger engagement. I could go into detail why, but rather than take up a bunch of space on this thead - take my word for it. It's NOT harsh supercharger engagement.

-m

mthis

this is very funny to me b/c i have the same problem in my car. and i dopnt even have a 55. i have a c63. but my car only does this in 5th gear at about 90mph. (only in that gear and that speed)

edit: how can this be possible in my car. i dont have a supercharger or turbos and currently runing stock ecu. and stock everything?

Fast55

Marcus, you're probably one of the last folks on here I would term disrespectful, so no offense taken. I've not experienced the problem and I have no reason to doubt it exists, or I have, but have always assumed it was the clutch since mine is probably one of the worst I've felt. If I was going to keep the car I would have put more effort into working on it, but given the residual, the problems I've had with the car, and the true value of an '06 with 16K miles, I have to let it go. It probably won't be the last 55K for me though.

e55 baller

Please everyone lets do this to figure out what the heck is wrong with our cars

The Revision returned from the dyno mode was :

Instr SW: 4102 ver 0073
Instr hw 4502 inst # A211 540 80 11
car is 2003 W211 E55. victor I will send you the VIN #

Also i tested my car in C, S, and M mode and only between 1-2k rpms. The car did this CONSTANTLY. However it would not trigger this behavior in M mode in gears 1-3, only 4-5.

SLK55R

My also could be replicated in C, S, and M mode. IT would happen at low RPM.

Honestly just to give more feedback on the problem was that it really felt like the tranny was going to downshift and then didn't. A few times it would downshift but it would go down 2 gears.

e55 baller

interesting. can you pull your h/w and s/w versions from the dyno mode? Mine is beginning to feel more and more like its a transmission issue despite my transmission woes. I hear a loud "thunk" noise which seems to come from the transmission or rear end. The entire car feels like it is "shocked". Its really bad and the car is now only really drivable at 5% Throttle or 100% WOT.

blando

Mine also felt like it was just about to downshift, but I was intentionally trying to stay under that threshold (since the car was warming up). The car jerked violently but never changed gears. It sounds more like the problem noted here, but maybe it could be transmission related.

Jax8308

Mine is:

2006 SL55 030

SW Ver. HW
25 05 0038 28 05

My car is away for the winter so I can't test it now, but I get a significant hesitation any time the SC is about to engage.

Can't you just datalog the throttle position to see if the ECU is closing it?

e55 baller

I have a scanner but not sure how to hook it up to a PC and record all the data elements over time. I will look into that this weekend.

SLK55R

But just to clarify I believe that the problem shows it self thru the tranny but is caused by something in the ECU or TCU.

I remember long time ago I pulled some error code that had to do with OL.

cls55

who did the software upgrade?

e55 baller

could this be the issue?

https://mbworld.org/forums/e-class-w...my-tranny.html

bad radiator screwing up the entire transmission? Looks like there is a TSB.

AMG-Driver

PM Sent.

Marcus Frost

Just wanted to post an update... been working with Victor/Vadim/Powerchips on the issue. Have an updated tune in the car with around 300 miles, issue has not presented itself once. Unfortunately, (or fortunately?) the weather is not as cold as it was when the issue was very prevalent (coldest it's getting now is 30-35) but inspite of my best efforts to get throttle cut, I have not been able to with the revised tune. I will continue to monitor this and let you know if the problem returns.

-m

razormb

I noticed this as well. As soon as the weather warmed up I couldn't replicate the throttle cut no matter what I did. I'm running Let tune + intake and Code 3.. I think we need higher load limits. Found an interesting post from SLK32germany on Crossfire;

"Highest boost I have ever seen was 20,6 PSI, when it was very cold outside (5 degrees Celsius). On a very hot summer day (33 degrees Celsius) I saw 17,5 PSI.

My tune is from the German "Tuning-Pope" O.Neumann / from Evotech Germany who did my ECU and TCU."

"Woody, the shifting-times are a little bit faster now, and the factory-programmed Load-Limits were set higher. Before the TCU-Tuning I had jerks under full-load from time to time. The jerks are gone now.

By the way, I have a special Option from AMG which is called the M-Mode. When I shift manually, the tranny holds the gear and does not shift at redline. For example when I'm in M-Mode I can give WOT in 5th gear, and the tranny does not shift back. Its fun from time to time to use the full torque without shifting back. But normally I drive in Automatic-Mode.
The M-Mode was a option which you could buy from AMG, but they don't offer it anymore. They now are more focused on the newer cars like the C63..."

Post 40 and on..

http://www.crossfireforum.org/forum/...ad.php?t=30690

Going to dyno tune for 185 soon and hopefully do tcu at the same time and get these limits removed.

cls55

marcus
did they work on ecu or tcu?
i dont think the weather has any thing to do with what we have,i think its a boost related because mine does it in 2 celsius in winter and 50 celsius summer where i live.

jamusa

Try it with traction control off.....if it detects a slight wheel spin with the T/C on some car will "nose down" then recover once the car get traction.

ProjectC55

I think this is a problem with all M113 and S/C M112's MB's.
When I am using part throttle while cruising and I decide to smash the throttle ,the car does have a delay then a herky jerky reaction where it would then downshift and then take off. It happens more so now that I have the 5.5L motor in my car. It seems to happen more so when it's pretty cold outside.

If I shift my car manually from 2nd on up and go WOT it will seldom happen,but try it from 3rd while cruising part throttle then go WOT,it is almost as if the car gets slghtly confused,delays,jerks,will downshift to 2nd gear and then will take off.

Is this bascically the same problem? It's annoying!

e55 baller

Does anyone know what the trouble code "load limit reached" means?

E55Pilot

it means the ECU saw too much boost