BigE

Does anyone know the real horsepower numbers of an '03-06 CL600? And 0-60? I've read that Corporate MB was a little conservative with the HP numbers and performance times that was released to the public. I just purchased an '03 last month and I can honestly say that I have never felt that type of "pin you to the seat" acceleration...everytime I press my right foot down I just get this uncontrollable grin....

BlownV8

Around 500 give or take 20 hp.

IngenereAMG

I know that they are conservative with the numbers from MB, especially with the AMG cars as well as the 600s.

If you think that your car wil pin you to the seat now, having your ECU set up will make it even wilder!

One of our clients did a pre dyno, and he came up with 512hp (crank)...to answer your question

BigE

Thanks for the info. I'm looking into getting the ECU modified. There is such a variance in price. From around $2K-5K. Is it necessary to get the TCU modified as well or is it just icing on the cake? What I mean is, will I blow my transmission if I don't have the TCU reprogrammed?

JAYCL600

when the tcu is modified they remove some of the load limits, u wont blow the tranny, get the ECU mod and u will have a totally different car, guaranteed

t-boy

I just got a 04 cl600 with Renntech ECU and TCU upgrade. I was told there were three settings for the transmission. How or where do I access these to change the settings?

BlownV8

To the left front near the base of your shifter, You will have a switch with a C and a S. Click on that and look at your cluster for the mode changes.

t-boy

Got it. Thanks!

V DuBb

whatever the factory says it usually ranges 20 give or take

Stephen04E55

Even though this really doesn't matter, when the Renntech ECU/TCU is programmed they add the "M" to the tranny menu. This is in addition to the standard "S" and "C". I feel as if the "M" is totally useless. The E55 cars have this as well.

t-boy

What does the M suppose to do? Does it make quicker shifts?

ssonss1

on the s class where exactly do you set the "s" and the "c" from...i have an 01 s600 and never seen it, heck i dont even know how to use the climate control properly and have had the car for three years

Stephen04E55

The M mode is supposed to be for manual mode. It is no quicker at the track in M mode but it may serve some purpose at a road course. My mode button is on the console near the shift lever. My car is an '03 and I have never looked at an older S class interior. Only S and C mode are available stock. My TCU has been reprogrammed to give me the M mode.

ssonss1

ooo ic...i guess maybe the canadian models are different or maybe just the 03 and up...mine says "s" and "w"....S starts in 1st gear and W starts in second...is the S and C's function the same thing as W and S?

BlownV8

Yeah, a normal S or CL just has two modes(S & W) but the AMG and Rennteched CL's have three(S, W, & M).

BenzBoy12

This guy seemed to make a lot more than that:https://mbworld.org/forums/showthrea...highlight=dyno

BlownV8

That's very unusual and is higher than most 600's with an ECU tune. Most get around 400 RWHP +- 20 RWHP on a stock 2003 and later 600.

BenzBoy12

I know. wonder what that was, although it is possible that it was dyno error. Is it true, though, that turbos have a hard time on the dyno?

BlownV8

I know that mine did not have a hard time on the dyno and have never head of any that have.

BenzBoy12

I read that because the dyno can't simulate the flow of air, they are down on power more than other cars, because they obviously generate more heat than a N/A car. Whatever. just wondering.

BlownV8

That's why the good dyno places have expensive high velocity fans to help cool the cars.

BenzBoy12

thats true.