1. Remove rubber dust cover.
2. Do not try to disconnect the plug - yet.
3. Push the bulb assembly forward (towards the front of the car) and twist anti-clockwise (looking from behind the headlights, towards the front of the car).
4. Use small flat-head screwdriver to pry the connector from the bulb.

Headlights are in the centre and are H7 12V 55W PX26D. High-beams are on the outside and are H3 (to confirm).