Fuel leaking under my '82 240D rear

[cewyattjr]

I've crawled under and looked and haven't yet located where it is coming from. You'd think it would be obvious, but it isn't. After parked a day or so, it leaves a puddle.

The hard lines look pretty rusty. How difficult are these to replace if that's the culprit?

May be a dumb question, but I suppose it would preclude passing a safety inspection?

Thanks for any thoughts!

Chuck