car: 1987 260E M103 2.6L

Hello, I notice there is a large electric fan located just right in front of the condenser. The condenser is the radiator like heat exchanger that sits right in front of the radiator. It never seems to be on. I wonder what it's for? Is there a way I can hot wire it so it will turn on when I need it to cool the radiator? I hope to do this while I wait for a replacement fan clutch to come in.