See also:

Tachometer
Always avoid engine speeds in the red warning field. In this range, the fuel supply is interrupted to protect the engine. ...

Maintaining/storing the speed
Press the button*. When the system is switched on, the current speed is maintained and stored as the desired speed. It is displayed in the speedometer and briefly displayed in the instrument ...

Display on the Control Display
Switching on the backup camera via iDrive With PDC activated: "Rear view camera" The backup camera image is displayed. The setting is stored for the remote control currently in use ...