uh, there really is no need for a DIY guide, it's the same exact thing as swapping out low beam bulbs and your owner's manual has good instructions. Basically twist the base, and lift up the bulb by the metal base making sure not to touch the bulb.
if you want it to match xenon, there are couple H7 bulbs that match pretty well. I think it was the PIAA plasma series bulbs that came out to be a close match. From personal experience though, the PIAA Extreme White Plus series are not a good match, too yellowish.
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