51 47... Removing and installing/replacing luggage compartment panel end cover on left or right

Left end cover 

Unclip end cover (1) at indicated locations and lift off.

Fig 1: Identifying Luggage Compartment Panel End Cover

Courtesy of BMW OF NORTH AMERICA, INC.

Installation: 

Replace faulty retainers (1).

Fig 2: Identifying Luggage Compartment Panel Retainers

Courtesy of BMW OF NORTH AMERICA, INC.

Right end cover 

Pull upward on end cover (2) at leather tab (1) and remove.

Fig 3: Identifying Luggage Compartment Panel End Cover And Tab

Courtesy of BMW OF NORTH AMERICA, INC.