The accessory switches use tiny 12v incandescent bulbs... it's a pain in the butt to fit a resistor in there with a LED but it can be done. The rear window defroster uses a LED for the on/off indicator and I think the cruise control indicator does as well. With the climate control the worst part is the numeric display. There are also LEDs in the driver's side master window switches but not one in the passenger side switch (although with a tiny piece of 1/8" acrylic rod it's easy to add one that looks stock
).