See also:

Demanding driving
In demanding driving conditions, such as operating the vehicle in hot weather, towing a trailer, or driving for extended periods at higher altitudes than normal, it may be advisable to switch to h ...

Other fluids and lubricants
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Activation
PAC is activated when the gear selector is moved to R if the system is selected in the MY CAR menu system or by pressing the CAM button in the center console. See page 133 for a description ...