Mercedes-Benz COMAND control unit Operator's Manual page 54

Introduction
52
Measurement Units
The measurement units displayed in
navigation mode are identical to those set in
the instrument cluster.
Input Restriction
There is an input restriction for vehicles for
certain countries.
The restriction is active for vehicle speeds
above apprx. 3 mph. The restriction is
deactivated as soon as the speed falls below
apprx. 2 mph.
Certain entries cannot be made when the
restriction is active, e.g. a city or road entry.
This is indicated by the fact that certain menu
items cannot be selected.
Menu Overview
Navi
Selecting map display
Setting route calculation mode
Setting Block Area
Save Off-road Route
Selecting information on map
Switching highway information on/off
Switching Audio Fadeout on/off