IF your 260E switch is the same design as mine, the electrical part of the switch assembly is held to the back of the main body with 3 straight-slot screws. With the instrument cluster out, you can use a mirror to see them. I tried for 1/2 hour to use a stubby flat blade screwdriver to get them out, to avoid having to remove the main body attached to the steering column, but no way.....The key in position 1 should align the internal plastic 'T' shaped piece so the plug can be pulled off the electrical part, the part referred to above attached with the 3 screws. This is so the thief can't pull the plug and hot-wire the car without a key to turn the ignition to position 1.
The fuse I replaced wasn't a strip fuse, like for the blower motor. It was a standard ceramic fuse in the fusebox, probably wired to a relay for the blower...of course, your car may be fused differently.

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1986 560SL
2002 Toyota Camry
1993 Lexus