Disturbingly easy actually
Remember that you have everything in your hands, you can see how the cover clips in!
There is a plastic edge attached to the leather and it just pulls out, and just pushes back in for reassembly.
Everything is just a snap in plastic piece aside from the bolster edge closest to the seat bottom. That short stretch is the last to reassemble and has a wire through the leather that clips into the base.
Honestly, typing this out is way so much more complex sounding than it really is!!
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1and1 (well, I suppose it's "Just1" now...)
Sold 135i - E82.N54 2009 BSM - MHD / xHP / DCI, PR CP & 7.5" Race IC / N55 mid & Borla
. . WL RSFI, Koni, Eibach & Dinan CP's, M3 CA's / EBC Red's & Firehawk 500's
X1 - E84.N20 2013 MGM - JB4 - The Wife's, now with new turbo & ewg