E-Class (W211) 2003-2009

Expect to replace conductor plate - and other Qs

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Old May 5, 2024 | 11:42 PM
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Natesi's Avatar
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WTB W211
Expect to replace conductor plate - and other Qs

I'm looking to buy a 2008 or 2009 W221 RWD, with the 722.9 transmission.

My understanding is that WGS2 started around 2008 (if it matters).

The more I look into this the more common the problem seems. I travel out of town every couple months and don't want to get stranded. Should I just plan on doing the conductor plate preventatively? It sounds like it's more a matter of WHEN it will fail, than IF it will fail, right?

It looks like with the 722.9, if a new conductor plate is used, it has to be programmed and coded to the car, as well as the fault code cleared with a STAR scanner.
I'm assuming a person cannot replace the conductor plate and drive to a shop to have the rest of the work done, right? Car would probably have to be towed, I'm assuming? Only way to avoid that is to send the unit in to circuitboardmedics.com, where they fix your existing conductor plate. But the downside is that you will be stuck with the original WGS1 or WGS2 conductor plate.

If I were to get the 4Matic transmission, and replace the conductor plate, would it need to be registered and programmed - since it's an older transmission design?
Does the E350 4Matic transfer case have the same bearing failure as the ML 350? Not finding much on that.

Thanks,

-Nathan

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Old May 6, 2024 | 02:19 AM
  #2  
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2006 E280
Originally Posted by Natesi

It looks like with the 722.9, if a new conductor plate is used, it has to be programmed and coded to the car, as well as the fault code cleared with a STAR scanner.
I'm assuming a person cannot replace the conductor plate and drive to a shop to have the rest of the work done, right? Car would probably have to be towed, I'm assuming?
This would be correct. You can start the car, but it won't shift gears because of invalid drive authorization.
You could pull the EIS (igniton switch), and send it out with the new conductor plate for coding. That's what I did when I replaced the EIS.
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Old May 6, 2024 | 02:43 AM
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WTB W211
Awesome; thanks!

Where would I send the EIS along with the conductor plate? They can code them out of the car? Would this still work if going from WGS2 to WGS3?

Thanks!
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Old May 13, 2024 | 02:20 PM
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S211 E320 4-matic
Would the 722 transmission reset procedure not be sufficient?
It will not erase the codes but for the rest it should work, right?
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Old May 14, 2024 | 09:35 AM
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2011 C300,2007 E-550,2013 E63 ,2018 GLS 450
I had Circuit Board Master repair my conductor plate,Has been 2 1/2 years with no issues cost then was $349 i think,Very fast turn around just a few days,you do need a scan tool that will get into the Transmission controller to clear codes/reset controller,Best thing is there is no programming to the car since it's your car's conductor plate,
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Old May 14, 2024 | 10:28 AM
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2011 C300,2007 E-550,2013 E63 ,2018 GLS 450
As much as I hate to admit this,I doubt that I will every buy another Benz just way to many problems with them,You want a great car thats head and shoulders better then a E-350 buy a Lexus ES350 and put all those Mercedes worries behind you...
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Old May 14, 2024 | 06:55 PM
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W212 M276 DELA 30 ; W211 M113k, W126 M117, W126 OM617, W211 OM642 ; R107 M117 X2, Sierra 1500 LZ0
Originally Posted by gotboost2
As much as I hate to admit this,I doubt that I will every buy another Benz just way to many problems with them,You want a great car thats head and shoulders better then a E-350 buy a Lexus ES350 and put all those Mercedes worries behind you...
Ahh yes, a FWD Avalon with a slightly better interior. Definitely a better vehicle...

Unfortunately the TT V8s in your E63 and GLS450 had lots of issues with cylinder scoring and plastic cooling bits falling apart. The scoring issues can be resolved by more aggressive oil change intervals, and unfortunately the plastic cooling bits are just something that you have to deal with.

The conductor plate issue on early 722.9s was corrected pretty quickly. I had an 07 that experience the problem, but by 09 it had already been updated.

Now would I buy a covid or post covid mercedes? Absolutely not, because they are now built by masked cucks being replaced by turks in their own country and designed for tasteless chinese.

Last edited by DubVBenz; May 14, 2024 at 06:57 PM.
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Old Sep 2, 2024 | 04:16 PM
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2003 E 320,2008 S550 W221
Originally Posted by Plutoe
I dont know what country you are from but you are putting the cart before the horse-----what you dont know is the condition of the current conductor plate------get a test that will tell you if you need to change anything
Plus no one changes the EIS when you change the conductor plate thats a waste of money and does nothing for the conductor plate unless the car was stolen and you cant use the key
Conductor plates are flashed in the car not on a bench so sending it somewhere is questionable
I am also a Veteran and own 08 S550 I am waiting on a conductor plate that I ordered yesterday.I have several questions I was thinking of replacing the transmission and rebuilding this one any thoughts or advice would be helpful. I want the vehicle to go to sarasota and back at least once a year. I am researching used transmissions and would like to know are all 722.904 tranny's the same with same mounting points is my concern.Thanks
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