CREATE TABLE table_12358 ("Model" TEXT, "Chassis code" TEXT, "Production time" TEXT, "Number built" FLOAT, "Engine" TEXT)

What's the total number built with a chassis code of w108.057?
SELECT COUNT("Number built") FROM table_12358 WHERE "Chassis code" = 'w108.057'
SELECT COUNT("Number built") FROM "table_12358" WHERE "Chassis code" = 'w108.057'