CREATE TABLE table_80114 ("Year" FLOAT, "Team" TEXT, "Co-Drivers" TEXT, "Class" TEXT, "Laps" FLOAT, "Pos." TEXT, "Class Pos." TEXT)

In which class had 252 laps and a position of dnf?
SELECT "Class" FROM table_80114 WHERE "Pos." = 'dnf' AND "Laps" = '252'
SELECT "Class" FROM "table_80114" WHERE "Laps" = '252' AND "Pos." = 'dnf'