I'm assuming these are just xenon replacement bulbs, and not an HID kit. Things are very tight behind the Contour's headlight assemblies, so you will need to remove them in order to replace the bulbs. To remove them, remove the two securing screws at the top of each assembly. Pop the assembly out, remove the wiring harness, remove the old bulb with a twist. Install the xenon bulbs and reverse the process; you're done.
