ZephyrAMG

So I just discovered that both front seat bolster adjustments do not work with adjustment buttons on the side. I don't regularly use them to adjust (inflate/deflate bladders) but noticed that they were out. I also noticed that only the drivers window does not do the "one click" up function, but only does the one click down. Either the module is out or fuses.

Does anyone know where specifically the front seat fuses are ( I searched and one source says engine) but I believe from researching they are fuses;

2,3,44,116,126.

2,3,4 are located in the engine bay and 116,126 are in the door panel.

Anyone know how to open the door panel fuse box? These are the fuses I think I should be looking for (116,126)

Thanks guys...

Mort

Hey Zeph, the Dashboard fuse panel is in the driver's side of the dashboard on the end next to the door. Pull out the cover slightly at the bottom pushing upwards and then along the trialing edge pushing forwards and then remove it.

GL finding your problem.

ZephyrAMG

Thanks as always Mort!

QWKSNKE

ZephyrAMG

Checking all fuses this weekend. Will update...

QWKSNKE

I have already been through my fuses. I had thought about disassembling the seat to troubleshoot

ZephyrAMG

Are you knowledgeable on the specific front seat fuses locations?

If both seats are out it is likely it is a connection issue...

riteoff

Curious if you are able to fix this.
Looked into this last year as both my bolsters are stuck full on so i sit on my seat not in it. Tracked down fuses to trunk fuse panel but didnt help. From reading it seems its a shorted wire thats frayed from seat movement. Cure is pulling seat backs apart. Havent tried that yet

JimmyR

Both seats are on the same circuit so if there is a fault with one both will go. Most likely it is the drivers seat as this is the one that gets used the most but easy enough to check by replacing the fuse and adjusting one of the seats to see if it blows the fuse. I am almost certain the relevant fuse was in the rear fuse box.
The fault is indeed frayed wiring to the bolsters somewhere in the "hinge" of the seat. Apparently the wiring harness is a little short and/or becomes stretched depending on where the seat fore/aft/recline position is set. Over time the wiring becomes frayed and shorts out.
I had mine fixed under warranty on my old 2010 model. Was told by dealer it was a "seat out" job, that the frayed wiring was repaired (rather than needing a new wiring harness) and then the harness repositioned to stop it being stretched.
If doing this as a DIY I reckon you could probably get some access to the wiring by removing that rear panel - might save the hassle of pulling out the whole seat.
Alternatively you could just get a new fuse in and you might be able to adjust the bolsters to your desired position and then forget about it?

QWKSNKE

Great info to have about the wires. I am off work tomorrow, if the weather is warm enough, i may dig further into it