I would like to make sure which is the return and feed line for my 83 240d. My lines are out of the bracket on the fender, so the outermost or inner line under the car, which is which?

One with the cigar hose is the return, the one going to the primary filter is the feed.

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1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13

I want to make sure my cigar and feed hoses are connected to the proper line. I think I could have inadvertently switched them.

I would compare some photos online but it will work either way, just one way bypasses the tank screen. Often times swapping them is what people do to be assured that the tank screen getting clogged is not an issue in a fuel related problem.

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1987 300TDT - 195,000 (Original #14 head)
1993 190E 2.3 - 105,000
1981 300D - 250,000