WARNING: This page is about a different car, the 2010 Audi Q7, 2009 Audi Q7, 2008 Audi Q7, and 2007 Audi Q7. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Identifying Seat Cushion Latch
Courtesy of AUDI OF AMERICA, LLC
-- Disengage LATCH caps -2- upward corresponding to cut-out -arrow- in sequence.