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 bonnetRefrigerant R134a Vapor Pressure Table
The vapor pressure table for every refrigerant is published
in literature for refrigeration system engineers. This table
makes it possible to determine the vapor pressure acting on the
column of liquid in a vessel if the temperature of the vessel is
know ...
Run-Flat Tire, Structure and Identification, SST Tire
Run-Flat Tires, Dismounting and Mounting. Refer to
→ Chapter „Tires, Mounting“.
A Tire Pressure Monitoring Display is Necessary When Using
Run-Flat Tires.
Tire Damage and the Pressure Loss Resulting From it ...
After changing a wheel
First read and observe the introductory
information and safety warnings
Clean the tools as necessary and place them back in the toolbox in the
luggage compartment .
Stow the spare wheel, temporary spare wheel or the removed wheel safely
in the luggage compartment.
The tight ...