i have the exact same car, over the summer i had to change my oil pan,"i can say right now, it is not supposed to look like that', it should be flat on the bottom with small ridges, i believe, i wont tell u how i smashed it, but it was leaking oil froma split in the bottom.

looks t me like the pan is the only thing wrong here, but for safety i would recomend cleaning all the oil that has been spewed, let sit for an hour, and return to look for a possible leak!

an another thing, DON'T REUSE THE COPPER WASHERS!

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82' 300SD