The following steps should always be carried out in the specified order before working in the engine compartment :

Park the vehicle on a level and stable surface.

Depress and hold the brake pedal until the engine has stopped.

Apply the handbrake firmly Braking, stopping and parking Brakes Parking .

Select the neutral position or move the selector lever to P Changing gear Changing gear Automatic gearbox see Automatic gearbox_0 Automatic gearbox see Changing gear_0 Automatic gearbox Manual gearbox see Changing gear_0 Manual gearbox .

Stop the engine and remove the key from the ignition Starting and stopping the engine Engine and ignition Ignition see Engine and ignition_6 .

Allow the engine to cool sufficiently.

Children and other people should be kept well away from the engine compartment.

Ensure that the vehicle cannot roll away unexpectedly.

WARNING
Preparing the vehicle for working in the engine compartment
Opening and closing the bonnetChecklist
To ensure your own safety and that of your passengers, observe
the following actions in the specified order :
Find a firm and level surface
suitable for lifting the vehicle.
Stop the engine, select a gear on a
manual gearbox or in case of automatic gearbox, move the selector lever ...
SAFELOCK mechanism
First read and observe the introductory information
and safety warnings
Depending on the vehicle equipment level, the vehicle may have a SAFELOCK mechanism
and an anti-theft alarm .
Function
Action
Locking the vehicle and activating the SAFELOCK mechanis ...
Electrically Driven A/C Compressor, Flushing
Vehicles with a high voltage system
Observe all of the additional warnings for all work
performed on vehicles with the high voltage system. Refer to
→ Electrical Equipment; Rep. Gr.93.
...