Brucis

I know that my back seat folds down because I have done it before but I can't remember how to do it. I can see what look like two releases, one on each side at the top of the seat but they doesn't actually release the seat. So I can't figure out how to actually push the seats down, even by a little. I've looked at the manual and it doesn't make it any clearer. Any help on this would be really appreciated because it's not intuitive.