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If your CLK55 has Parametric steering option - Please Help.
I'm writing from the W203 group for help. I have a 2005 C55 heavily modded with nearly all OEM options from both the NA and Euro versions.
I'm working on my last mod (hopefully) which is retrofitting the parametric steering (code 213) which was available on the CLK55 / 63 and the black series. The rack is fitted, the wiring harness is installed. My ECU, even though coded correctly, will not energize the solenoid valve on the rack. I sourced the rack from MB direct, plus tested the solenoid which works when energized directly. I know that is all OK.
EPCnet is very difficult to dicifer as to the correct ECU to get. I'm hoping that you guys that have this option on your CLK55 (preferably 2005) can give me the part number that's on your ESP ECU. It's the control unit attached to your ABS pump front left (DS) corner of the engine compartment.
My best research has ECU p/n: 036 540 04 01 as being the correct ECU as it is shown for 203 and 209 cars and for 209 cars is shown with 213 coding.
There is another post going on about the changes between CLK and C 55's - I'm following that post to see if ESP settings are the same between the two.
Even with the correct ECU, SA code 213 may have to be added to the data card. After SA code 213 is added you will have to then SCN code all applicable control units as per a function diagram of the system.
Can you give more specific detail on adding to the data card, and SCN coding as per the function diagram. I connected DAS / Star and initialized or coded the option. It said that the ECU was activated successfully, PML or SPS showed as fitted and active. I did not see the functionality in any of the other ECU's.
If you have step by step coding instructions I can do those and report each result. Thanks for your response.
2005 ESP does not have any SCN coding I believe, but I will have to double check. The ME-SFI and transmission both do however, and I am not currently looking at the function diagram, but I'm pretty certain that ME needs to know if the vehicle has SA code 213. In order to add it, you need someone who has a non bootleg star diagnosis and a SCN user id. They should then be able to add the SA code via retrofits and modifications and then re-SCN code ME and probably trans, ETC. Some retrofits can not be done via Star Diagnosis, and can only be done by (MBUSA, in the US)
You could also try someone who has developer software for star diagnosis, it MAY be possible with that.
SCN coding is how the ME knows what the vehicle coding is...it prevents tampering.
The Star I'm using is factory supplied, not bootlegged, however I don't know about the SCN user ID. I can talk with the tech (not MB tech) who is helping me and see if we can do the additional steps you mention.
If I understand this further then, if I were to replace the ECU with either 034 545 72 32 or 036 540 04 01 (the best I can tell are the correct choices) I would still have to do this coding?
Thanks for your help and I'd be curious to know what you find out about double checking 2005 and SCN coding.
Last edited by kjb55; 08-21-2011 at 07:30 PM.
Reason: added the ECU question.
I can verify on Monday about the ESP and SCN coding. If the tech doing the coding purchased his SDS from MBUSA, then he should have a SCN user id.
Yes no matter what ESP control unit you install, you still need to tell all other control units on CAN that process information for ESP, what version is installed.
Really appreciate the help! I'm in too far not to invest in a new ECU if I have to - but if all I'm doing is not coding what I have correctly, it would save me some $$'s.
Sorry for the delayed response, I've not had much free time. I have checked and there is no SCN coding of ESP. I will have to interrogate some wiring diagrams and coding info for the two systems.
Thanks for the continued effort. I'm holding off buying anything until positive its needed. The only wiring that I thought I needed to add, and did, was pins 13 and 44 at the ESP harness. The ECU has the pins. I used factory connectors and wiring.
The project is successful... Liquid smooth speed sensitive power steering in a US C55.
The stock ECU 034 545 77 32, turns out, does not have the PML or 213 capability. Sourced a 034 545 78 32 and option 213 is listed on the ECU housing. The ...78 32 is for both W209 and W203.
Option 219 - Distronic is also listed. Hmmm, might just be a new project.
If your CLK55 has Parametric steering option - Please Help.
its so nice to visit here a nice thread. Am so impressed with your such a good hard work, its definitely a good and diferent idea for others, you guys are doing good work good luck, keep it up..
The project is successful... Liquid smooth speed sensitive power steering in a US C55.
The stock ECU 034 545 77 32, turns out, does not have the PML or 213 capability. Sourced a 034 545 78 32 and option 213 is listed on the ECU housing. The ...78 32 is for both W209 and W203.
Option 219 - Distronic is also listed. Hmmm, might just be a new project.
Hi,
I have just been able to locate and purchase an ABS ECU, part no. 034 545 72 32 with 213 listed on the ECU and would like to hook it up to my installed BS steering rack. Please let me know which wires and connectors I need to purchase from MB to hook this up. Part no.'s and any advice would be fantastic. Once you installed the new ECU, did you have to get your car coded to get the parametric steering to work?
Actually, the ABS ECU I installed was from a 2003 CLK 500, part number 209 545 26 32 with "213 PML" engraved on it. Everything fit perfectly. While hooking it up to the existing OE wiring harness it did not appear that any pins were missing or unused. Does this mean that parametric steering is now functional on my car? or do I still have to connect a wire from the steering rack to the new ABS ECU. If so, how? any help would be appreciated.
By the way from my controlled test drive, ABS and ESP work perfectly with this new ECU installed and steering seems to be a little lighter at low speeds.
Hi Tump43... I've been spending any free time on the Ferrari boards as the major on the F355 ran 6 months long and 5 figures. Not pleasant.
Verify that the wire harness exists from the steering rack solenoid to the control unit. You can visually see the solenoid from above. follow the steering rod from the firewall. If it isn't present then we'll need to share a computer screen and dig thru the parts list online.
Thanks for getting back to me. Good luck with your Ferrari and my sympathies on the cost and aggravation relating to its repair/maintenance -- often times, I hear, these are one and the same on a Ferrari.
I did more research and found your description indicating that two wires branch out of the OE bundle of wires that are connected to ABS ECU (with option 213, PML) and hook up to the steering rack.
I checked the OE bundle of wires hooked up to my new ABS ECU and two wires do not branch off of it. I do know, however, that my steering rack did come equipped with wires and a connector from the solenoid, since the mechanic who installed it told me there was an electrical connection comming off the streering rack that he could not see where to connect on my car, so he tapped it off.
Looking down from the top of the engine bay on the driver's side, between the ABS ECU and the front of the rear of the headlight is an electrical connection that seems to be the one coming from the Black Series steering rack. I have attached four photographs of this unused electrical connector. Photo #4 locates the electrical connection, and photos 1 thru 3 show the electrical connection circled in red.
Is this the wire coming from the steering rack? If so, what do I have to buy and what do I have to do to connect that wire and electrical connector to my new ABS ECU that has option 213, PML? Any help would be greatly appreciated.
I'm fairly certain that that is not the connector. My steering rack did not have the wire harness included, but did have the solenoid. You will be able to see the solenoid from up top and follow the wiring harness to your connector in the picture. I don't think the harness from the rack could reach to where it is in the picture.
Disconnect the connector at the ECU and look for female pins at locations 44 and 13.
You're going to have to build the harness either from your pictured connector to the ECU, or from the solenoid to the connection point at the frame rail, and then to pins 44 and 13.
Unfortunately, EPCnet doesn't work on a Mac, so I won't be able to look up the information until I'm back at the office. In the meantime, I'll look through my paperwork and see what records I kept. Verify the above and I'll look for my install information.
The connection is worth the effort, the parametric steering is really a great feel and feedback when combined with the better black series rack.
The wiring harness from the solenoid valve at the rack to the connection point on the frame rail is A203 540 10 13.
Next step is to build the wiring harness from this connection point (frame rail) to the ECU pins 44 and 13, which is item 160 in the attached. The other items needed to build the wiring harness are listed in the attachments.
Last edited by kjb55; 01-22-2013 at 07:31 PM.
Reason: attachments
I'm trying to do this same mod on my 2008 C300 W204 - the hard part is confirming what wiring harness I need from the ESP ECU to the connector for the parametric steering.
With the W203/209, the ESP wiring harness is clearly separate - its own wiring harness so you can buy the parametric steering version and install. I can't seem to find this for the W204 and am thinking it's all integrated into a main harness making wiring up the parametric steering more difficult.
I found wiring information - but I'll have to dig deeper to where it goes. This is coming from the rack. As I see it so far - wiring harness 10 plugs into coupling 932 of the main wiring harness. 932 is what I'll try and track down.
Would you know if this harness also goes to the power steering pump as well? It looks like the W204s have solenoids on the power steering pump and the steering rack. It's possible that for the 204 the parametric harness is its own harness that goes to the front SAM or something and it is not just a different ESP harness.
If I could just figure out the entire route of the harness in the 204 and then worry about the coding later.
Would you know if this harness also goes to the power steering pump as well? It looks like the W204s have solenoids on the power steering pump and the steering rack. It's possible that for the 204 the parametric harness is its own harness that goes to the front SAM or something and it is not just a different ESP harness.
If I could just figure out the entire route of the harness in the 204 and then worry about the coding later.
08-20-2011, 03:39 PM
