I had to replace bulb in wife’s 2006 bug but it didn’t work. After searching these sites I and seeing what others were doing I tried drilling a hole and putting a short 3/4 shim with screw between the plastic that holds the headlight socket and the inner fender. This helped keep the socket from flexing when the headlight assembly was reinserted. Also, and this is important, after all was together, from inside engine compartment I pushed the socket even harder with a large screwdriver and heard a ‘click’. I knew all was right with the world then.