Yep, my alternative which I don't even know if its a good idea or not is to get a used E350 off BringATrailer or if I really want reliability I should probably get a 1980s Mercedes 300D. The W123s are insanely reliable.
Edit/addendum: I personally strongly encourage the use of biodiesel or appropriate diesel alternatives where applicable, pre 2004 are often more compatible with biodiesel. Would still take any diesel vehicle over gas