It's the Extended Interior Lighting Package you're speaking of. (563) which is standard on most 3 series but "line" specific. Can't remember quite what model you need to order to get it but it's on most
Extended Interior Light Package (S0563)
Extended lighting. Door handle lighting, LED reading lights at the front and rear with ambient lighting, front footwell lights, vanity mirror lighting for driver and front passenger, and LED luggage compartment light.