M-Class (W164) Produced 2006-2011: ML280CDI, ML320CDI, ML420CDI, ML350, ML500, ML550

Passenger Seat Harness reconnections

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Old Sep 9, 2020 | 11:29 AM
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Saumyendra Basu's Avatar
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Passenger Seat Harness reconnections

While changing both auxiliary and main battery, one of the harnesses came out. It’s from the top/ back and it’s black with orange and yellow wires. Please help with front and rear photos.

View from the front

View from the back.


Better image from the back

Last edited by Saumyendra Basu; Sep 9, 2020 at 12:43 PM. Reason: Image from the back indistinct
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Old Sep 9, 2020 | 03:30 PM
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And what is the problem? It broke, you don't know where it goes, what?
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Old Sep 9, 2020 | 03:37 PM
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Yes - It got disconnected. This one is the end connector of the harness number 87 and part number A164-440-66-38. I don’t know where it will go. It’s the main one coming in from the right top of the seat looking from the back.
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Old Sep 9, 2020 | 03:58 PM
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Originally Posted by Saumyendra Basu
Yes - It got disconnected. This one is the end connector of the harness number 87 and part number A164-440-66-38. I don’t know where it will go. It’s the main one coming in from the right top of the seat looking from the back.

Take a close up photo of the top right connector
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Old Sep 9, 2020 | 06:20 PM
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Originally Posted by Maj. Dundee
Take a close up photo of the top right connector
The main one comes in from right and moves towards the left and there are multiple connectors connecting to different places. This one is the end connector which got disconnected. This connector is black with 1 orange and 1 yellow wire. Must be some function of the passenger seat. I tried the most commonly used ones like Moving seat forward, backwards, up, down, tilt, warming and all of them work. Am I missing any other function to see which one has been affected?
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