Certain preparations must be made before you change the wheel.
Please refer to the important safety notes Link.
Apply the parking brake.
Manual gearbox: Engage first gear.
Automatic gearbox: Move the selector lever to position P.
If you are towing a trailer, unhitch it from your vehicle.
WARNING!
If you have to change the tyre on a gradient, block the wheel opposite the wheel being changed by placing the wheel chocks or similar objects under it to prevent the vehicle from rolling away.