Assistive mechanics creeper for car repair

We will invent an assistive mechanics creeper that will allow those with bad backs, knees, hips, and even the elderly to work underneath a car. This invention will allow a person to slide from a wheelchair onto the device, lower, and recline backwards to the posistion of a traditional creeper. This can be done without the person ever having to get up and adjust it. The device will be able to hold a maximum weight of 300 pounds.