On my C-Class (W204) I have just noticed I'm missing part of the rubber seal between the underside of the bonnet and the top of the offside headlight as shown in the pic below like this:

The other side is fine, like this:

Not sure how important this part is but I should really replace it shouldn't I? Where is the best place to get a replacement one from?
Thanks

The other side is fine, like this:

Not sure how important this part is but I should really replace it shouldn't I? Where is the best place to get a replacement one from?
Thanks