Pagz

Zayed,
I wonder if coding is the only reason for different ECM part# on me2.0 W208 55?

I checked under amg label,as expected it is same ECM as 00 C43!;
(same Bosch# too)

cm60k

Definitely no Paul,

ECU counting the Ratio through TCU via speed sensor signal in the ESP module and the RPM sensor in conductor plate,

that's why MB Expand the file in (ME2.8 & ME2.8.1), and deliver the signals through ECM module,,

so many countries that has strict Environment rule NOT that care about GAS/Petrol vehicles, they focus more & more on Diesel vehicles,,

that's one of the reason that MB doesn't equipped Emission components in their differ models, unless if those countries demand it in their vehicles..!!

ZAYED,,

cm60k

Yeah, ECU # are the same in all "W202 C43/W208 CLK55/W210 E55", cause they're sharing the same timing -∅⌥ Ratio, in the ECU ignition angle file MSG,

OEM code: FD/M03 till M10, and Bosch code: 026RT/318 till 509 means; timing ignition are the same in all M112 6zyl & M113 8zyl, Except Kompressor's..

ZAYED,,

Pagz

Thanks Zayed

Since we are talking modules, do you know why MB update the 00 C43 ESP with module 029 545 72 32? reason is this module has different engine bay side harness plug and updated pump(pump looks same) so this module cannot be plugged in.. , rest of ESP system is same 99/00.

My 99 C43 had 025 545 61 32 and 00 CLk55 had 029 545 70 32 module, both these have same plugs... so why change it for 00 C43 and not 00 clk55??

Maybe it is not necessary to change to this ESP but maybe it is better?, ..why MB.. why

cm60k

Paul,

"025 545 61 32" is an old #, that has a narrow GB capacity, MB replace it to "70 32" & "72 32", to accommodate with update ABS pressure through the BM140 pump pressure sensor,,

any "W202/W208/W210" with last version of 6/00 M2.0 or ME2.8 or ME2.8.1, it should come with "70 32" & "72 32", during to the update pressure at ABS pump..!!

ZAYED,,

Pagz

Excellent! - Thanks

Some time back I asked Fabian(kaype)about this, he said he had changed the pressure sensor when he updated his esp but now I understand why!, maybe there is also internal changes in the pump as well?

Such weird thing that 70 32(from 00 clk55 but not shown in epc) and 72 32(from 00 C43) has different 48 pin plug..., both use same pump

cm60k

I have "70 32" & "72 32", they are the same pins & plug, what the difference in those 48 pins you have..??

while they're Q01 without PML, they should be the same..!!??

ZAYED,,

Pagz

72 32 is used in 00 clk55 also(my donor 00 clk55 came with 70 32 but has updated pump) so can only assume some very early 00 clk55 had 70 32 that is not shown in epc.

70 32 used in upto 99 C43, then 72 32 in 00 C43, but epc doesnt show the engine side harness updates to change plugs ;

cm60k

This plug harness is different on late M2.0, but can't assure that, cause MB put differ plugs on even M111, it's depend to the harness & ESP system spec.,

my friend's C43 has "72 32" with "70 32" plug..!!

that's the main reason that can't always counting on VIN # on EPC..!?!?!

ZAYED,,

Pagz

Usually epc is ok,Maybe I am using incorrectly

I tried 00 C43 ECM/EIS/steering lock with 70 32 ESP...unfortunately esp doesn't work because it brings up "CAN bus faulty",it seems EIS from 00 C43 does not recognize 70 32 so only option if want to run this ECM is 72 32 esp be installed along with harness(maybe pump too) from 00 C43...

I took it for a drive with the ECM coded to CLK55 and with esp in "F" condition, it felt a little slower than my clk55 ecu,also sounded not as loud!?!...because I was using 00 C43 ecu on 5.4 I reset the adaptions, I wonder if having no esp would cause some torque limiting?, or if resetting the adaptions could pull back timing for a while???..

cm60k

Sure Paul,

ESP has a limitation Rotate mass, that counted in the ECU to provide proper safety Rotation when it is in OFF position,

pump pressure are the same, but Rotation at the wheels are differ coded in "72 32", during differ file saved in late ME2.0 & ME2.8,,

when i put my VIN # in EPC, it shows my harness should be "202/71" with code: "UPR9", but the one i have is "208/28", with code: "UPR13"..!!

ZAYED,,

Pagz

Thanks Zayed for confirming

Damn epc!... I guess it keeps things interesting for us

Do you know if maps are changed when coding is changed from C43 to CLK55 in ME2.0?... or if when ECM is ordered at factory that only "one" map is loaded based on VIN?.. and coding only sets up for other parts of the system?

cm60k

Yeah Paul,

ECU map should changed during to more displacement,

if you order NEW ECU, they will load the file as a Key signal Authorization & Engine spec.,,

usually they saved ME/VIN info. through TCU, for fire-up via DAS system..

ZAYED,,

Pagz

>>assuming all 31 32 ECU contain maps for c43, clk55 and e55, then its only coding that selects correct maps?(not factory entered VIN)

I want to install 00 C43 EIS/ECM/ESP but want to make sure I have same clk55 maps.

Maybe a simple test with performance "G meter"/ to compare would be sufficient, Dyno takes to much effort

cm60k

Sure Paul,

C43 has the same map with "CLK55/E55", saved in the ECU file,,

but as you know; the Authorization for fire-up saved in the TCU through the ESM module in the late version of ME2.0>>ME2.8..!!

ZAYED,,

Pagz

Thanks Zayed,

Is fuel/ignition maps exactly same for 4.3, 5.4? I would have thought there would be some difference in base maps?,

This TCU/ESM must not have authorisation as it fires up with clk55 or c43 ECM/EIS..

cm60k

Good point Paul,

The early version of (Fab/98>>Apr/99) C43/E55 ME2.0, fuel & ignition angle are the same,

but MB change the angle map & combined the map with first model of (Oct/00) CLK55,

i could be wrong; but i think fires-up Authorization saved in TCU/ESM module back signal to the ECU via. EIS/EZS..!!

ZAYED,,

Pagz

Thanks Zayed,

I am still not sure why MB updates ECM for 202 C55, Maybe there is some small differences...it makes me think that early ME2.0 ECM comes from factory based on VIN rather than SDS coding!.. because my 99 C43 ECM doesn't accept coding from 00 C43 ECM
Also, I forgot to record my 99 ECM coding because I thought it was in epc,one day I need someone to read there 98/99 with SDS!, because I don't use this ECM its ok for now.

From comparing many codes in epc it "looks" like 073 014 058 CLK55 code means; 073 being CLk type, 014 being transmission and catalyst type , 058 being amg maps for 202/208 V8. however I am only guessing

00 C43 is 003 005 058
E55 is 002 005 057 - this code is accepted in my 99 C43 ECM, but of course gives CAN fault due W210 wiring differences.

Also,to compare with 00 C43 ECM I reset "boot strapping" adaptions on clk55 ECM, now I have slow throttle response on this ECU also...assuming need to drive it a lot now to re-learn

cm60k

Paul,

MB must change W202 C55 ECU, during to the differ diff. Ratio bearing file (2.82:1 VS 3.07:1), and differ MAF back signal (4.84v>>4.95v),

W202 98-99 ECU definitely will NOT accept W202 00, cause it has tiptronic shifter with ESM controller module,,

i'm not that sure about those coding's, but you're correct about "058/S99C" is an AMG E-prom data/file..

i think it's more better in "performance" if you keep C43 ECU map, with CLK55 swap, both got the same timing, but differ ignition angle & fuel range, which is NOT necessary to been adapted, it will be re-learn & saved in the E-prom file..!!

ZAYED,,

Pagz

Wierd thing is there is no coding in EPC for 98/99 C43 only 00...so 98/99 must be ordered based on VIN?!..

Thanks,I will investigate the MAF voltages, does this mean C43 ECM is not capable of seeing the airflow produced by 5.4 at higher RPM?

cm60k

Sure Paul,

you should able to see the MAF voltage, the current will constantly NOT stable, cause the TB sensor will reads a differ RPM range, with re-learn condition,(IAT>>density>>fuel range at WOT)..!

ZAYED,,