Careful with this item... I've made this mistake before.
Although they all look the same, there are different flavours of this spoiler.
I experienced the fact that the coupe and saloon ones were very different. This one seems to be off a W201 judging by the boot lock aperture. The original AMG item is very heavy and would require some adjustment of the boot lid springs in order for the bootlid to stay open.
This item looks (its tricky to tell) like it isnt as substantially constructed. It may well be an aftermarket copy made by the likes of Erebuni (see pic) if so, they can be bought new for $150 or thereabouts. The quality is questionable however.
I had a look at the catalogue and couldn't find that item for the coupé, only for the saloon! There must be a coupé version but I've not been able to find it yet.