Lack of sunglasses holder is one of the "more popular" small complaints of the E70 model. It's ridiculous that BMW did not provide one.

I bought the ashtray replacement which gave me a little more room but it's still not big enough for my glasses. I took out the plastic ashtray, lined the space with black felt, and that's where I keep my sunglasses now. Solution is not that elegant but I'll do a better solution later. At least my sunglasses don't get scratched.