How do i change a headlamp on a 2003 cad. dellavil?

Open the hood and remove the filler panel that runs across the top of the radiator.

Remove two bolts that mount the headlight pod to the cross support and the one bolt on the side of the headlight pod.

Turn the headlight pod 90? and pull on the headlight pod to disengage it from the plastic retainer. It may take a hard pull.

You can now replace the lamp.