No major repairs, whether involving the dismantling of vehicles or not, shall be made to such vehicles outside of enclosed buildings. Minor repairs, such as but not limited to engine tuning, changing of spark plugs, changing of oil, changing of tires and similar procedures, shall be permitted. The provisions of this section shall not prohibit the repair of vehicles inside an enclosed garage or other building. Nothing herein shall be construed as permitting the commercial repair of vehicles in residence districts.