Motor vehicle service station, after approval of detailed plans for the proposed use by the Zoning Hearing Board. Such plans shall be drawn to scale and shall show the locations and dimensions of the site, together with all buildings and facilities proposed for the site, including pump islands, display racks, signs and accessways. In addition thereto, sufficient space shall be provided on a lot so that a reasonable number of motor vehicles may be parked while waiting to be serviced. All repair work shall be conducted within a building designed for such purposes. Lighting facilities shall be so arranged as to reflect away from abutting properties, and the Zoning Hearing Board may condition any approval upon the installation of fences, trees, shrubbery and other suitable barriers to protect adjacent uses.