The bonnet may open and block your view.
The bonnet may suddenly drop into the end position.
There is a risk of injury for anyone in the engine bonnet's range of movement.
You could come into contact with hot gases.
You could come into contact with other hot, escaping operating fluids.
Components in the engine compartment may continue running or start up suddenly, even if the ignition is switched off.
Make sure of the following before performing tasks in the engine compartment:
The ignition system and the fuel injection system work under high voltage. You could receive an electric shock.
Ignition coils
Spark plug connectors
Injectors
Certain component parts in the engine compartment can be very hot, e.g. the engine, the cooler and parts of the exhaust system.
When the engine bonnet is open, and the windscreen wipers are set in motion, you can be trapped by the wiper linkage.