Levers on back of lights - one up, one down - can't remember which way but is in handbook.
HTH
Link to handbook here - http://images.omegaowners.com/documents/UserGuides/OmegaOct2002.pdf
Here's what it says in the handbook, all references to continental driving, but not a lot of good if your in the UK. What i want to know is what position the levers should be in for driving on UK roads :-?
Headlamps when driving abroad
The a symmetrical dipped beam increases
the field of vision on the passenger side of
the lane.
This causes glare for oncoming traffic if the
vehic le is driven in countries where traffic
drives on the opposite side of the road.
To avoid glare, switch both dipp ed b eam
headlamps to symmetric al dipped beam:
1. Open bonnet.
2. Remove headlamp protective cover: turn
rotating lock through 90° using a coin
and remove cover.
3. Remove the headlamp c ap. 4. Adjust lever shown in illustration:
Left-hand drive vehicles
Left-hand headlamp = Move lever
downwards
Right-hand headlamp = Move lever
upwards
Right-hand drive vehicles
Left-hand headlamp = Move lever
upwards
Right-hand headlamp = Move lever
downwards
5. Check light/dark limits of d ipped beam
(e.g. in front of a wall):
Horizontal = Symmetrical
Angled upwards = Asymmetrical
6. Place the headlamp cap in position and
close.
7. Refit the headlamp protective cover and
secure with rotating lock.