I believe the kick panel has to come off first. It's clipped on so you just pry it out.

The lower dash panel is in two sections. The rear carpeted section has three screws into the dash. The forward black section has three screws along the seam with the carpeted section. The inboard screw takes a 90-degree turn to release.

That should do it.

Sixto
91 300SE
87 300SDL