H15 bulbs are dual filament. DRL, full/main beam and sidelight ie. One bulb does all 3 jobs. H7 bulbs are the ones for dipped beam ie. One bulb, 1 job. If you have front fog lights, they're H11 bulbs. They can be accessed through a small door in each front wheelarch.
Yeah, it's the D3SIt's the same info that's listed above.