Whats this pipe?
#3
Looks to me like the water drain from the boot (trunk) lid gutter on a convertible. If it is a 'vert then you'll see the top end of it behind the fuel tank carpet covering in the boot. Think it's just come unclipped. On mine there is one on each side, linked together in the middle with a T piece. Afraid if it's a coupe, then I can't help much beyond saying the pipe looks very similar.
#4