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 bonnetTwo-Part Fine Filling Paste, Flexible
Definition:
Two-Part Fine Filling Paste, Flexible -LSP 787 100 A1-
Edition 07/2010
Product Description
The Two-Part Fine Filling Paste, Flexible -LSP 787 100 A1-
is a two component filler paste with hig ...
Additional Information Sources
Technical Service Handbook outlining action to be taken to
rectify current problems.
For the repair manual for model-specific repair work. Refer
to
→ Heating, Ventilation and Air Conditioning; Rep. Gr.87.
...
Refrigerant R134a Environmental Information
Vehicle air conditioning systems make use of the
vaporization and condensation process. In this case, one works
with a substance which boils easily, designated as refrigerant.
The refrigerant employed is tetrafluoroethane R134a, which
bo ...