Triskelion

Pls. help, I have 2010 528i e60 halogen set up, I want to change ae, so I bought the h10w bulb 12w from e92, but when I tried to take out the oem bulb holder it wouldnt come ot, I tried twisting it and tried pulling it with no luck, do I have to take out the whole headlight assembly to change it or pls let me know the right way to do it, pls let me know and help out, thanks in advance