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1997 E320 W210/ 722.6 Trans Wiring Harness

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Old Mar 25, 2019 | 10:01 PM
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MB 1997 E320/w210
1997 E320 W210/ 722.6 Trans Wiring Harness
Hello All,

I recently had my 1997 E320 go into limp mode. I have found that the wiring harness from the TCU to the tranny does not have any current going through the wires. All 16 of them.
I want to change the harness but am unsure how to go about it. Any suggestions?





Max
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Old Mar 25, 2019 | 11:07 PM
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02w163ML500 / 97w210E50AMG / 99w202C230k / 95w124500e-wip
Originally Posted by max2015
Hello All,

I recently had my 1997 E320 go into limp mode. I have found that the wiring harness from the TCU to the tranny does not have any current going through the wires. All 16 of them.
I want to change the harness but am unsure how to go about it. Any suggestions?





Max
Are you sure it's not just the connector that is the issue? tranny oil leak?
What codes were scanned?
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Old Mar 26, 2019 | 12:14 AM
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A gaggle of MB's
Please see stickies in W210 forum at Benzworld - replace tranny adapter connector (genuine MB or MOPAR only $14) - and pull and clean Transmission Control Module in engine compartment with 1/2 can of MAF cleaner..
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Old Mar 26, 2019 | 03:10 PM
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MB 1997 E320/w210
The oil that leaked into the original TCU was very little but I did get another that was completely dry and in good shape.
I didn't know you could change the plug..Does it just unscrew apart?
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Old Mar 26, 2019 | 03:11 PM
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MB 1997 E320/w210
Thanks I will do that. Any advise on how to get the TCU out of the case to clean it??
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Old Mar 26, 2019 | 03:24 PM
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Originally Posted by max2015
The oil that leaked into the original TCU was very little but I did get another that was completely dry and in good shape.
I didn't know you could change the plug..Does it just unscrew apart?
Did you follow fabbrisd1 advice?
Have you investigated this?
Example....
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Old Mar 26, 2019 | 03:34 PM
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MB 1997 E320/w210
HI,

Yes I followed that video and others and I replaced the conductor plate.


Thanks again
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Old Mar 26, 2019 | 03:36 PM
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MB 1997 E320/w210
I replaced the adapter plug was wondering how to replace the plug on the harness




Thanks
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Old Mar 26, 2019 | 03:41 PM
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Originally Posted by max2015
Thanks I will do that. Any advise on how to get the TCU out of the case to clean it??
I personally have never had this issue with the TCU, however, read here and post 16.
Last edited by khomer2; Mar 26, 2019 at 04:22 PM.
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Old Mar 26, 2019 | 03:43 PM
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Originally Posted by max2015
I replaced the adapter plug was wondering how to replace the plug on the harness




Thanks
Why do you need to replace the plug on the harness?
Use electrical contact cleaner.
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