1. Just for anyone coming to this now as I did: the button on the left is indeed mirrors/front wiper defrost, and the one on the right (ok, centre by the cupholder) is the rear window defrost. I agree the symbols are a bit ambiguous.
2. For the 1998-2002 models, does anyone know if the buttons by the front cupholder (4 way flasher and rear defrost) normally have lighting as do the ones on the left? Mine don't, and I haven't yet figured out how to get them out to check for burnt out bulbs.