Hey guys...

In my '83 300D-

popped the hood, working on tranny problem, I noticed that a large hose, connecting to the firewall on the passenger side, was torn almost completely through.

I want to order a replacement, but don't know what this would be called.
Is there a diagram that actually resembles what is under the hood? So I would really know what I am looking at, and what everything is called?

These "NASA schematic"-type diagrams make my head hurt!

Is there anything that is user-friendly out there?

Thanks guys.

There are two drain hoses on the firewall. They drain the water out of the cowl vents.

Those are some pretty big hoses for just plain old drainage.
Thank you!

Is it the one by the battery in this picture?

The cowl vents also collect rainwater runoff from the car's roof.

I apologize for not reducing the picture size, I'm not using my normal computer.