The recommended method is to remove the cover cap, detach the electrical connector, pinch the retaining spring to release the bulb, withdraw it and reverse the procedure, basically the same method used for years. The problem comes in that the dipped headlights are effectively mounted in the wings there are cross-members running across the back of the headlight housing. I can manage to get the cover cap off and see the connector but I can't see any further in and can't easily reach the retaining spring, unless I lay across the wings, but I can't see what I'm doing or reach in sufficiently to change the bulbs, I finally gave up and took it to a local garage, how ridiculous is that taking it to a garage to change the bulb because of stupid design.