The 2008 Cadillac XLR has no real options--because virtually everything comes standard.
Cars.com reports that the present 2008 Cadillac's "long list of technical features includes a head-up display, radar-operated adaptive cruise control and an electronic stability system."
Edmunds notes that the standard Cadillac XLR 2008 "comes with just about all of the luxury features you'd expect, including 18-inch alloy wheels with run-flat tires, adaptive xenon HID headlights, heated leather seats with plenty of power adjustments, dual-zone automatic climate control, keyless startup, a head-up display, a navigation system and a Bose audio system with satellite radio and a CD changer."
In fact, when it comes to Cadillac XLR 2008 options, Kelley Blue Book simply says "the only options are the Platinum and Alpine White Editions and chrome wheels." ForbesAutos sums it up quite nicely under its "2008 Cadillac XLR Options" heading: "N/A."