The lens is not removable by itself. The entire headlight is a unit. Remove the entire unit by removing 3-4 bolts under the hood, and one screw back on the rear outside corner. You will then have access to each of the bulbs.
Go here ---> http://leocerruti.com/lsc//hidinfo.html and download the HID replacement instructions, that will show ou how to remove the assembly. The lens is not separate toguh so maybe you can somehow get inside through the access holes in the back of the unit.