An apparatus and method for lifting a vehicle above a work surface of a vehicle repair system and maintaining the wheels of such a vehicle at a height near the same height as the vehicle is raised. The apparatus is an adjustable riser-ramp assembly which includes a platform having a pair of adjustable, self-locking leg sets, at least one ramp removably attached to the platform and a mounting slide engaging the platform and the work surface. The apparatus may be used in multiple combinations of platform and ramps to accommodate the type of vehicle and type of repair system being worked on by an operator.