When the knurled ring is at 
push
the lever towards the dashboard (stable position).
The warning light 
on the instrument
cluster will come on.
Pulling the lever towards the steering wheel again, the main beams are turned off and the dipped beams on.
See also:
Starting procedure for petrol versions
Proceed as follows:
❒ Ensure that the handbrake is up;
❒ Put the gear lever into neutral;
❒ Press the clutch pedal down to the floor without touching the accelerator;
❒ ...
Additional checks
Every 1,000 km or before long trips, check and top up as necessary:
engine coolant level, brake fluid level, windscreen washer liquid level, tyre
pressure and conditions.
Every 3,000 km check and ...
Heating
Proceed as follows:
❒ rotate knob (A) (pointer on -) completely to the right;
❒ turn knob (C) to the required speed;
❒ move knob (D) to:
to warm the feet and at the same time ...