Open trunk lid manually, function - GF80.20-P-3013Q

MODEL 209.3 /4 

When the locking cylinder in the trunk lid lock is in the 0° position (1), the trunk lid lock is actuated electrically when the trunk lid handle is pulled and the vehicle is unlocked globally. Otherwise, it is necessary to hold the mechanical key in the 30° position (2) and actuate the trunk lid handle to mechanically open the trunk lid.

Opening with the mechanical key is possible regardless of the central locking state.

Fig 1: Identifying Trunk Lid Lock Direction

Courtesy of MERCEDES-BENZ USA