Base Range Shifter
WARNING: This page is about a different car, the 2004 Lincoln LS. However, it is still accessible from the selected car via links, so may be relevant.
Courtesy of FORD MOTOR CO.
The optional Select Shift Transmission (SST) range selector has seven positions P, R, N, D5, or D4, + and -.
This option will allow the driver to manually upshift and downshift into any gear range.