See also:

Temporary shut-off of the air conditioning
The air conditioning is momentarily disengaged during full-throttle acceleration or when driving uphill with a trailer. This may result in a temporary increase in cabin temperature. ...

Keyless drive
Vehicles equipped with the optional Personal Car Communicator have the keyless drive function, see page 63 for detailed information. ...

Steering wheel keypad
The keypad varies according to the vehicle's equipment 1 Turn the thumb wheel to go up/down among menu selections. Press the thumb wheel to make a selection or store a function in the system' ...