Hi mate
Funnily enough i replaced the front grill on my q3 today with a honeycomb one
Its a full bumper off job but it isnt too difficult , you have to unclip the wheel arch covers , the clips are accessible behind the wheel arch trim once you remove the bolts , just help push the clips out as you pull on the cover took me around 15mins to remove the bumper all in all , you will only need t25 and t30 torx bits