Re: what kind of bulb in illuminated door sills?
Whooboy, was a major pain (but worth it)...I started with, from the top down, so to speak, with the Temp Control. This unit pops apart, and inside uses green-rubberized incandescent bulbs (little green bulb condoms!) to illuminate a clear plastic light pipe system (really cheapo illumination system, Valeo controls). I actually drilled pockets in light-pipes and mounted four blue 12 vdc LEDs in light pipe, 12vdc is easily accessible. The used 2 12vdc white LEDs to illuminate the temp setting wheels.You can take the two ***** off unit, and the bulbs are accessible with needle nose pliers behind a little white flap (diffuser), but you need four LEDs to replace the light output of the bulbs (or really bright LEDs with a wide dispersion, or light pipe cannot work).
Next up, replaced every single individual green LED in switchgear (window switches x 2, spoiler, heated seats x 2, locking switch, etc.) with hi-intensity std blue LED. The switches all have a SMD resistor already in place, but you have to break down the switch to component level to remove existing LED. Not recommended unless you have a vacuum operated de-solder tool - standard solder sucker (spring loaded) will rip the el-cheapo traces right off PCB.
As for radio, see earlier posts, I retrofitted VDO 4200RS Navigation system, lighting is already blue, so fits in and has a face plate that is virtually a perfect match to xfire silver plastic.
Much Work, looks great, god I need a life!...ct