Adjustable side bolsters




EDIT: wow! I just noticed the person in the post right above me said the same exact thing! At least I am not imagining things.
The Best of Mercedes & AMG
It may be different for your model but I think the main ones that were blowing were in the boot/trunk of my car.
Once replaced, they kept blowing which signaled the likelihood of a short elsewhere - sure enough, it was under the driver's seat from memory.
The fuse list is generally in the tyre changing kit with the spare wheel.
If you search, there's a link on this site to a scanned copy I believe.
I can't remember the fuse number but recall it was in the fuse box in the trunk, in the vertical column of fuses closest to the front of the car, and a 7.5 amp fuse.
The drivers seat and passenger seat bolster adjustment are covered by the one fuse. In mine the problem was in the drivers seat, with some of the wiring being stretched and/or wearing thru the insulation and shorting at the "angle" of the seat ie near the hinge between the backrest and seat base.
Before replacing the fuse I positioned the seat back rest leaning fully forward, to release the tension on the wiring to the switches in the side of the seat. This enabled me to get power to the bolsters to deflate them so I could actually sit in the bloody seat properly, however as soon as I moved the seat back to my seated position it shorted again and blew the fuse.
By this stage, and still being under warranty, I took it back to the dealer to fix. I was told it was a "seat out, all day job", they had to re-insulate the wiring and then reposition the wiring harness under the seat so that it was not stretched as it crossed the hinge part.
Hope this helps




