Probably the best mod possible, because everyone can relate and use it. It's crazy how the manufacture did not think of a great place to put our sunglasses! Now, we have a solution.
Install takes 5 minute, just take the old one out with a T25 bit, and swap it. And, done! You can either tuck or cut the 2 straps as shown.
Fits: E9x 3 Series & M3