Dynamic Seats - Not working - HELP

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Old 08-02-2019, 02:05 AM
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W218 Stage 2, E85
Exclamation Dynamic Seats - Not working - HELP

The massager and the side bolsters movement have stopped taking place. Not sure what happened and I have no clue where to begin.

Although, I am able to adjust the side bolsters to how narrow or wide I want them to be ONLY within about 1 minute of starting the car. Once I set them to one setting, and a few minutes have passed, I can't move them anymore. They don't move according to the steering either. Lights are ON. But...the seat massager, when I press that button, the red lights flash and turn right off. It doesn't even massage anymore. I have no light on dash, idk if it would or not lol.

Idc much about the massager, but I really miss the movement of side bolsters,

Have anyone had this issue or know what and where can I start looking to solve this issue?

Any input would be appreciated.
Old 08-02-2019, 09:40 AM
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Perhaps killing power to it would "reset" it so I would first try to locate the fuse for the seat, remove it, and then reinstall it. Or, look under the seat, find the connector, disconnect and reconnect.
Old 08-02-2019, 01:48 PM
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The active bolsters are prob controlled by a "G" sensor of some type and I would think that may be the issue. The sensor isn't picking up a signal for L or R turns and not communicating with the seat bolster logic. I don't have a clue where to look for it, just using common logic on how things work. Marv
Old 08-05-2019, 09:36 PM
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Ahh, I think I can give that a try to reconnect and find the fuse.

But the thing that's confusing me is that every function works for like the first minute once the car starts...and then after that, no matter which button I press, nothing happens. The lights stay on for the side bolsters or off if I do turn it off, but the massager's lights turn on and less a second they are off.

I haven't checked the fuses because if it was that, wouldn't just completely shut down? But i will check. I have no idea what's underneath the seat and all the electrics lol
Old 08-06-2019, 08:21 AM
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Clearly the fuse isn't blown. My suggestion to remove and then reinstall the fuse is to interrupt power to the seat in the hopes of resetting the seat controller.

What do you do when your PC is acting weird? You re-boot it or power it off and then on.
Old 08-23-2019, 12:35 AM
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My dynamic driver's seat stop working as well and the auxiliary battery was the cause. Once I replaced it, the seat worked as designed.
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Old 09-28-2019, 07:30 PM
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Originally Posted by pgolfco
My dynamic driver's seat stop working as well and the auxiliary battery was the cause. Once I replaced it, the seat worked as designed.
I have been inactive on the forum for a while.

Where is the auxiliary battery located?
Old 09-29-2019, 11:08 AM
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See attachments.
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additional battery - B03.pdf (260.5 KB, 190 views)
File Type: pdf
additional battery + B03.pdf (269.7 KB, 187 views)
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Old 09-29-2019, 07:26 PM
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Originally Posted by konigstiger
See attachments.

thanks for the PDF files buddy. You're the new wikipedia haha.
Old 07-07-2024, 02:38 PM
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Originally Posted by Roop94
The massager and the side bolsters movement have stopped taking place. Not sure what happened and I have no clue where to begin.

Although, I am able to adjust the side bolsters to how narrow or wide I want them to be ONLY within about 1 minute of starting the car. Once I set them to one setting, and a few minutes have passed, I can't move them anymore. They don't move according to the steering either. Lights are ON. But...the seat massager, when I press that button, the red lights flash and turn right off. It doesn't even massage anymore. I have no light on dash, idk if it would or not lol.

Idc much about the massager, but I really miss the movement of side bolsters,

Have anyone had this issue or know what and where can I start looking to solve this issue?

Any input would be appreciated.

hey i am currently have this problem have you got it fixed? i need help.
Old 07-12-2024, 03:48 PM
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hello sir i still need help with this trying to figure it out but wondering if you have fixed the issues and how you did it??
Old 07-12-2024, 03:49 PM
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anyone see this and willing to help could you please send me a message on Instagram pls @lamhuaa.

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