52 24 ... Emergency actuator for rear seat backrest

WARNING: This page does not describe the selected car, but rather 12 other vehicles, including the 2008 BMW 335xi, 2008 BMW 335i, 2008 BMW 328xi, 2008 BMW 328i, and 2007 BMW 335xi. However, it is still accessible from the selected car via links, so may be relevant.

Release hook of backrest lock
Backrest

Fig 1: Identifying Backrest Hook Lock And Backrest
Courtesy of BMW OF NORTH AMERICA, INC.

Insert screwdriver for levering in snap-in hole of rear seat lock.

Press screwdriver to centre of vehicle and in so doing press supporting point (1) of Bowden cable outwards.

Fig 2: Identifying Bowden Cable Support Point And Screwdriver

Courtesy of BMW OF NORTH AMERICA, INC.