GL Class (X166) 2013-2015 after facelift became GLS (X166)

Retrofit? Middle Seats

Old May 29, 2025 | 11:35 PM
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Commandodan1999's Avatar
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2015 GL450 4MATIC X166
Retrofit? Middle Seats

I came into possession of middle seats for a 2015 GL450 X166, I've installed them but the harness for mine is different from the donor vehicule in that mine did NOT come with the powered and heated middle seat, therefore the pins in my shop side connector aren't there. How would I go about retrofitting my car to accept it?

I'm basically trying to do a harness change to add the connector pins that will run the motorized system in it at a minimum.

Any help figuring this out would be great.
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Old Sep 10, 2025 | 09:08 PM
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I want to do the same but there is no history of anyone ever trying. Did you get any farther with this? Besides the harness, you'll need to populate the fuse box underneath the driver-side seat.
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Old Sep 18, 2025 | 06:57 PM
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08 GL320 CDI
Originally Posted by Commandodan1999
I'm basically trying to do a harness change to add the connector pins that will run the motorized system in it at a minimum.
Motorized MIDDLE seats?? What is motorized on the middle seats? I understand the rears fold, but the middle??
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Old Sep 18, 2025 | 07:18 PM
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The middle also folds, the option is "Power EASY-ENTRY". Vehicles equipped with this option have a button on the shoulder of the middle seats.
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Old Sep 19, 2025 | 03:40 AM
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Bah, just one more thing to break, kinda useless really.

But thanks for the info.
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