You should be able to get to it, but it's been a while so maybe I'm thinking of another car. If you can't get to it with the crossmember in place, put a jack under the tranny and drop the crossmember. Put a pad between the jack and pan, if that's where you set the jack, so you don't dent or otherwise damage the pan.

FWIW, the switch at the far end of the pedal's swing usually goes first.

Sixto
91 300SE
87 300SDL