Really doubt that you can control a particular slide from a switch without signficant cost and modification of the hydraulics. Just thinking about it and visualizing the hydrualics in my Mountaineer you would need 3 electric / hydraulic solenoids for the individual slides, plus some sort of backflow preventing 'valve', otherwise once the slide you were actually trying to move was done, the next one in the chain would start to pressurize and move. Don't have the foggiest on the cost, I looked at the complexity about 2 years ago and decided I would just deal with it (I don't even have the control knobs to block mine so I'd have to get that as well
.