Molding Nylon Clip Number

[1957Birdman]

Here are two photos:



I was able to find this clip in the past, but it was very hard to locate on the exploded parts diagrams. I should have written down the number. To reiterate, the piece in the picture fits on top of the back rocker molding (this molding is used on the 1999 and 2000 w202 and the sport models) at the rear and attaches to the rear quarter panel.
Thanks,
1957 Birdman