Do not use the tire changing jack to work on the vehicle. Use a hydraulic floor jack rated for the weight of the vehicle. BMW supplies a wheel chock with each vehicle. Use the wheel chock whenever raising the car.
The vehicle should be jacked up only using the factory jacking points. The jacking points along the rocker panel are marked with indents in the metal. Chock the wheel opposite the corner being raised. Pad the jack saddle with a rubber pad or a block of wood. Use jackstands to support the car. Do not go under the car with the car supported only by the jack.
On the E36 3 Series, the jacking points for a garage jack are located directly below the openings for the tire changing jack and are raised platforms on the underside of the body.