To a great extent, the controls you need are dictated by your disability. While I am not aware of a manufacturer who markets a product capable of safely guiding a vehicle by telepathy, it would not surprise me to find one. Let it suffice to say that, if you are conscious and have a desire to drive, you probably can. For those of you who have no desire to drive, please skip to the next topic. Here is a brief list of driving aids.
Little things mean a lot.
Don't overlook little details. Many times a relatively small thing can make a vast difference. Since it takes time and effort to transfer to the drivers seat, I would recommend you mount a couple fans in the van with switches by the lift side door. They might just keep you alive until you can get transferred to the driver's seat and activate the air-conditioner. A matched set of two way switches near the drivers seat will allow you to turn the fans off after ten minutes or so.