zuzu_pali

I have a 2004 clk500 ecu with 306 hp


I have a replacement ecu from ml500 288 hp

Do I lose the horse power from replacing the ecu ?

Plutoe

Dear bonehead, you are going to loose more than that if you do something as dullard as that.

insame1

It just plain wont work. Do some searching be fore you post or you will get flamed like the post above.

BenzAMG99

Why on earth would you want to replace a clk500 ECU with a different model ECU? And for you to ask if you would lose horsepower if you switched an ECU that originally had 306 hp with 288 is a joke.... Like common man get in line.

ALFAitalia

Deleted

zuzu_pali

are you guys all kidding me? because its the same part number as the 2004 clk500 ! its the same number and its compatible !

zuzu_pali

because the ecu has the same effing part number thats why! its for ml500 or a 2004 clk500! but my question was that the ml 500 only has 288 hp so is the computer programed to that?

zuzu_pali

thats pretty ****ing funny because the part number is the same as the 2004 clk500 so before you guys start talking **** go see for your self. its compatible and everything . i just wanted a simple question answered

zuzu_pali

Dear Dick head,the computer part numbers are all the same , a 113 153 48 79
05 ml500'

2004 clk50 computer 113 153 48 79

so whats the problem ****ing idiot? i was just asking would i lose the hp even if the computers are compatible and the same. but the spec on the ml500 is 288 hp

Yidney

I'm no electronics expert, but I'm not sure it's a simple question. I don't know that an ECU is set to a certain HP per se, but is rather set to control a number of parameters that may be different where an engine is intended to deliver one HP rating vs. another. Whether all those parameters can be reset to match your engine is a different question. How soon can you plug it in to see what happens?

Yidney

Or put another way, of all the possible outcomes from replacing an ECU, I think that your car running perfectly but only delivering 288 hp is an unlikely outcome. That's just my guess.

zuzu_pali

but the part numbers are the same for the ml500 and the 2004 clk500

i put the new computer in and i have no ideah . i feel like i lost hp but i dont know if thats in my head or what. i think its the same engine as the ml500 but the ml500 ways way more !

Yidney

Oh, so you already installed it and it runs fine? You could have escaped some flaming by mentioning that. Well, if you cannot tell the difference then that proves my theory once again that people who insist they can feel a big difference from stuff like new filter housings are mostly imagining things.

Rudeney

Actually, this engine and its ECU uses ME 2.8. That is the same for all M112 and M113 engines hence the common part number. ME is just the "protocol" for the ECU communicating with the various engine components. In addition to that basic code, the ECU has adaptations and even firmware that can be changed based on the specific engine. Obviously the operation of the M112 V6 would be different than the M113 V8, but the ECU can simply be coded for the appropriate engine. The problem is that this is performed via SCN coding, which requires a "live" version of SDS connected to MBZ corporate, and also, it can only be performed once on a virgin ECU. At least that's the "official" functionality. As with many things, there are probably hackers who have figured out how to do this with other means, like a complete firmware download or direct EEPROM programming. The bottom line though, is that you cannot just swap an ECU.

Yidney

Rodney's answer is a far more sophisticated version of my hunch. So Rodney, if his car actually seems to run, what is happening - are all the various parameters "close enough" but his engine is running at some unknown lesser efficiency?

zuzu_pali

the car us up and running . the ecu has same part number on both ecu!
and the car runs fine but i have no ideah if i lost horse power or not.

zuzu_pali

ml500 ecu a 113 153 48 79
2005 Mercedes-Benz M-ClassCurb weight: 4,874 lbs

Curb weight: 4,874 lbs


Horsepower: 288 hp


MPG: 14 city / 17 highway


Engine: 5.0 L V8


Torque: 325 lb-ft


Wheel size: 17″ diameter, 8.5″ width


Dimensions: 183″ L x 72″ W x 72″ H





2004 clk500 computer 113 153 48 79

Model: 2004 Mercedes-Benz CLK-Class

Curb weight: 3,585 to 3,905 lbs


Horsepower: 302 hp


MPG: 17 city / 22 highway


Engine: 5.0 L V8


Torque: 339 lb-ft


Wheel size: Front 17″ diameter, 7.5″ width; rear 17″ diameter, 8.5″ width


i already swapped the emobilizer to the doner ecu the ml500 . they both have the same engine but weight is different . so at the end of the day did i lose the horespower or no?

Yidney

We got that it has the same part number the first 15 times you said it. If you would listen to Rodney, he's telling you that is not the only issue - they are the "same" at some level, but have custom settings for each engine. But your attempt to "equalize" HP between the 2 because of weight, wheel size, etc. is just silly. If it runs ok, then you got lucky. Beyond that there is no answer we can give you.

tw2

The engine and electronics are close enough for it to run. Both are 5L V8 with identical ignition, fuel injector size, fuel pressure etc (I presume). They also have similar timing, fuel delivery etc. They differ in the final trim, ie the ML probably runs less timing or a bit richer etc to make the lower power that MB was aiming for with that model. What was wrong with your stock ECU?

I wouldn't have thought it would work at all without the VIN being coded to it. If you took one from a 4.3 or 5.5L M113 or the M112 then you would definitely have issues despite the same part number.

Zavato

The OP lost some of his HP. Let's arrange a search group and look for the OP's HP, but I suggest this be done on the QT. OK?

zuzu_pali

haha

zuzu_pali

i swapped the e mobilizer chip from one ecu to the other so key can turn and start

Rudeney

So, swapping all the other parts means your car now "thinks" it's that ML500 donor. The CLK500 and ML500 have the same engine, but the ML500's lower HP is due to a change in engine program to give the heavier ML a bit more torque at various points on the power curve. In real world driving, it may not make a difference at all, but it will be different than a stock CLK500.

PaulE550

From a software perspective, both you and tw2 are correct. While the part number of the ECU may be the same between the two vehicles, the firmware (software) loaded on the ECU is different in certain ways. The ECU OP installed in his CLK500 is programmed with a vehicle identifier code and configuration setup for a ML500. It contains programming designed to operate all the engine components and sensors it controls as a ML500. Fortunately for OP, both the CLK500 and ML500 were similar enough, engine wise, and OP transferred over enough components from the ML500 to get the ECU to think it is still in it's original ML500. So lucky for OP, his CLK500 is operational, but the ECU is controlling it as a ML500. So timing, sensor feedback and overall engine performance will mimic that of a ML500.

Zavato

Star Trek 17- the search for lost horsepower