Repair of trucks; Installation, maintenance and repair of air filters; Repair and maintenance of engines for motor vehicles; Repair and maintenance of motor vehicle engines; Repair and maintenance of motor vehicles and their engines; Repair and maintenance of vehicle tires; Maintenance and/or repair of trucks and trailers; Maintenance and/or repair of semi trailers; Maintenance and repair of chassis parts and bodies for vehicles; Installation, maintenance and repair of chassis parts and bodies for vehicles; Refueling and lubrication services for vehicles and equipment; Maintenance and repair of engines for motor vehicles; Repair and maintenance of starters for motors and engines; Repair and maintenance of chassis parts and bodies for vehicles; Repair of air filters and parts thereof; Repair of intake air filters and parts thereof; Repair, maintenance and modification of trucks and trailers; Repair, maintenance and modification of engines; Repair, servicing and maintenance of vehicles and apparatus for locomotion by a mobile mechanic