Intermittently sit, while test driving vehicles and reviewing manuals, schematics, and specifications, walk, stand, bend, squat, crouch, stoop, climb, kneel, reach, balance, feel, and twist when performing installation or repair of equipment, perform simple and power grasping, pushing, pulling, and fine manipulation, speak, use telephone, write, and use keyboard to communicate, see, hear, and smell with sufficient acuity to evaluate proper functioning of various vehicles and equipment, visually differentiate between colors on wires, regularly lift very heavy weights. Check brakes and install brake pads, rotors, brake shoes, and belts, inspect and install shock absorbers, repair or replace car locks, windows, window cranks, rear, and side view mirrors, headlights, spotlights, taillights, and signal lights, replace fuses and connectors.