Test Drive The Car Escape

It is a car service station. It is one of the busiest service stations. A lots of car come and go every hour. It was the closing time and every other staff left to their homes except one. He was busy in servicing a car. After he finished all the repair works he found that the car's key was missing. He couldn't test drive the car without its key. Help him find the key so that he leave home after test driving the car.