1. Locate the bonnet release lever. The bonnet release lever is located on the driver's side footwell, near the door sill.
2. Pull the bonnet release lever. This will release the bonnet latch.
3. Lift the bonnet. Once the bonnet latch is released, you can lift the bonnet up.
4. Prop the bonnet open. There is a prop rod located on the left-hand side of the engine compartment. Insert the prop rod into the hole on the bonnet to keep it open.
Here are some additional tips for opening the bonnet of an Opel Astra:
* If the bonnet is frozen shut, you can use a de-icer to melt the ice.
* If the bonnet release lever is broken, you can use a screwdriver or other thin object to release the bonnet latch.
* Be careful not to drop the bonnet when you are opening it.
If you have any questions or concerns about opening the bonnet of your Opel Astra, please consult your owner's manual or contact a qualified mechanic.