I've had my eyes on the CPO site for a while, and I'm trying to figure out some specifics around this Premium Interior Lighting option. My understanding so far is that the lighting was original included with the tech package, and then became a $1,500 option, and now is a $3,500 option with other interior enhancements. Can anyone confirm my understanding? And, does anyone know when (around which VIN sequence) the option showed up? I've been ruling out some early VINs because they don't show the option on the CPO site, but now I think the lighting may be included on some earlier cars.