The snivelling excuse of a parts bod at Mercedes Chichester.
Need a new pin for the OBD socket on the Proper car and as I was passing I thought I would pop in and ask. This particular individual has previously tried to make an issue out of buying parts, especially for retrofit stuff so I wasn't expecting much.
Anyhoo he has a rummage on his laptop and then says he can't find the parts in the EPC because he doesn't know where to start.
The Merc EPC doesn't always show you until you click on an item and read the description... Pins and plugs are simply a generic image, it's only when you click on them that they get identified. That said, the EPC does show the basics harness arrangement so if you know roughly where you're aiming you can find them easily enough.
I had a rummage when I got home and sure enough, first thing I clicked on was identified as Data Connection 16 pin X11/4 aka the OBD socket, and next to it on the diagram, the pins for it.
Suffice to say I won't bother going there again.