space up seat
n.— «The third row seats are what Toyota refers to as “space up” seats. These seats, designed to accommodate two adults if required, fold away to increase utility space. They can recline through 18 degrees in 9 steps of two degrees each.» —“Fortuner—A New Suv From Toyota” Wheels24 (South Africa) Mar. 2, 2006. (source: Double-Tongued Dictionary)