Its kinda hard to make out those numbers, but I think it might be #11? If you look from left to right, its the bumper piece farthest to the right, or from the car's point of view, the closest thing to the car's frame itself (this piece is what bolts to the frame).

The car is a US spec, so I don't know if the VIN will help you. The reason I'm looking for it is cause I have an AMG front spoiler/bumper that won't fit around my US spec bumper bar, and I heard that there is a difference in size between the US and Euro spec bars which would account for the fitment problems. Anyhow, let me know!