When you open the hood to your BMW, there should be a small opening near the front of the car, ON the fender just above where the clear corner is. Reach in there with a phillips screwdriver and loosen the screw. Then the corner lens should just slide right out and you can remove the bulbs.

If you really want to make it look cool, put some chrome bulbs in as a replacement and you will not be able to see your bulbs when they are off but they will flash amber when lit!