He does not fight and eventually one of the suspects pulls him out of the vehicle, while another looks inside, searching the car for the gun.
The attackers appear to be unaware of the camera mounted in the vehicle.
Captain Mavela Masondo told TimesLIVE that there were three attackers involved.
"(The security guard said) he noticed that one of them was holding a firearm. The suspect with the firearm started shooting and the complainant was shot on the upper body," said Masondo.
"It is further alleged that suspects drove with the victim to the informal settlement at Snake Park in Alra Park, Nigel. They robbed him of an undisclosed amount of money, cellphone and bulletproof vest. No firearm was taken as the victim was unarmed," he added.
Police were investigating a case of attempted murder and robbery.
No arrests had been made.