You want to do this with the face of the gauge pointing up. Otherwise, if you pull on the L shaped springed terminal with the face pointing down then the bulb can fall into the gauge and then you'll have to spend a minute or two shaking it out. Just pull on the L shaped terminal fairly hard and twist until the bulb socket comes out. To get the bulb out of the socket, push the bulb in and turn it counterclockwise 90 degrees.

 

© 2013 Drake Smith - Please do not use or reproduce this elsewhere.  Feel free to link to it though.