Yes mate they do, the little red bits of rubber keep everything in place. Well worth buying genuine ones, as the others you can get are cheap and nasty, I got mine from the local main dealership for about £12...saved me waiting for delivery.
NB: The little black plastic circles above the H and S break off, use them as your washes when you screw it to your car! I didn't notice them until after I'd turned the house upside down looking for a couple of metal washers to do the job!!! When you take your plate off you will see some grey/black sponge, I kept that on to protect from any scratching and to stop and possible rattles!
That's not a bad thing!!! Just nipping in to look can be dangerous! I went in to look at the A5 coupe when it first came out! I'd planned on keeping the S3 for 4 years....it lasted 2 years and 5 months before I ordered the A5 coupe