I too spent a recent weekend looking for a fuel leak. Didn't find one. Car still smells a bit like gas, but the smell seems to be going away.
Had a great time crawling around under the thing, taking off panels, looking at the rear fuel pump.
At one point I found myself inspecting a seal around the fuel line where it enters the body. To get the seal back on, I ended up hugging the drive shaft with the crank case inches from my face, working blind to get the rubber seal back on.
I've never hugged the driveshaft of a car before, and I didn't really intend to, but the sentiment is there.
It's a great old beast.
'88 260E ~200,700 miles
- All stock, except for Blaupunkt "Miami Beach"