51 47... Removing and installing/replacing bottom left or right trim panel for luggage compartment (with 3rd seat row)

If necessary, fold out 3rd seat row.

Detach trim panel (1) from retainers (2) towards top.

Installation: 

If necessary, replace faulty retainers (2).

Fig 1: Identifying Trim Panel And Retainers

Courtesy of BMW OF NORTH AMERICA, INC.

Installation: 

Guides (1) and tabs (2) on trim panel (3) must not be damaged.

Fig 2: Identifying Trim Panel, Guides And Tabs

Courtesy of BMW OF NORTH AMERICA, INC.