I've got a cheap bumper hitch on my TD that I took off a 300D in the junkyard. Works fine for small utility trailers. I wouldn't use it for a heavy trailer. JC Whitney sells a receiver hitch for 123 sedans and wagons. Pricey but probably worth it for heavy pulling. Limit is 1500lbs unbraked, 2500lbs braked.

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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