http://www.realoem.com/bmw/enUS/show...diagId=51_5097
I can't be 100% sure, but I think it clips onto the back of the bumper or quite possibly the air duct number 2 in this link
http://www.realoem.com/bmw/enUS/show...diagId=51_3275
With regards to the washer bottle, according to this page, there isn't a screw at the bottom but again, I think someone else will be better in the Knowledge. I had mine off but it was a good few years ago now.
http://www.realoem.com/bmw/enUS/show...diagId=61_1465