I have an 82 240D with 4 spd and the only option was power windows. Sticker Price = $22,500. Standard equipment included -CC, AC, 4spd, Rear Wdo defroster, power antenna/am-fm/cassette, etc. I would think an 80 model would be only $1-2K less.

Have good day.

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1976 240D
1987 560SL
2007 E320 Bluetec
1998 C280 (now son’s car)
1982 240D Manual - Sold