To start your Unimog using the UNI-TOUCH® ignition lock: insert the key into the holder and press the start/stop button. Press once to activate the radio position, twice for the drive position with monitor, and a third time – while holding the brake pedal – to start the engine. A fourth press without the brake pedal shuts the vehicle off. For a direct start, press and hold the start/stop button while pressing the brake pedal.