You are absolutely right Edward, I've just been out and switched my lights on and the one on the rear drivers side is in fact the rear fog light, even though it looks like a reversing light when not in use. Well spotted, I boobed there didn't I.
Yes I have electric seats on both sides but only the drivers seat is memory but yes, they are both heated and cooled too. . My 250 had memory on both sides though.
I probably could work out a way of giving two of each but not sure it is worth the effort. I would need to purchase a light cluster and modify it. I dread to think what the cost of one would be!! On my previous car used parts were available not sure there would be any for an IS300.
Ed :eerrrmm: