When the shift lever is in the S position, the shift lever can be operated
as follows:
Upshifting
Downshifting
The initial shift range in S mode is set automatically to “4” according to
vehicle speed. However, the initial shift range may be set to “3” if AISHIFT
has operated while the shift lever was in the D position.
(→P. 202)
■ Shift ranges and their functions
You can choose from 5 levels of engine braking force.
A lower shift range will provide greater engine braking force than a
higher shift range, and the engine speed will also increase.
Shift position purpose
Shift position Objective or function
P Parking the vehicle/starting the engine
R Reversing
N Neutral
D Normal driving*1
S S mode driving*2 (→P. 201)
Changing shift ranges in S mode
■S mode
When the shift range is “3” or lower, holding the shift lever toward “+” sets the
shift range to “5”.
■AI-SHIFT
AI-SHIFT automatically selects the optimal gear according to driver performance
and driving conditions.
AI-SHIFT automatically operates when the shift lever is in the D position.
(Shifting the shift lever to the S position or paddle shifting cancels the function.)
The engine speed may remain high after releasing the accelerator pedal. This
does not indicate a malfunction.
(Found on Page 201-202 of Owner's Manual)
S-Mode is a selective mode similar to having the "4, 3, 2, L" selections in the 4th gen and other vehicles mainly intended for engine braking and not much else. It chooses what your maximum gear allowed is; it shouldn't be confused with a "Sport" mode or some quasi-manual mode. Some vehicles will either rev limit or switch out of the gear even though it is selected in "Manual" mode to prevent damage to the vehicle, so I would take those things with a grain of salt.
I have always found the "Up to Downshift and Down to Upshift" layout of BMW to be annoying and non-intuitive in my personal opinion; we've been taught from a young age that for the most part "Up" is more and Down is "Less." Elevators, Building Floors, rankings, ect. not to mention the 30-40 some odd years of Automatic vehicles that have been set-up with P R N D (followed by lower gears.) In the vehicles that have it backwards with UP being Downshifting I have always mis-shifted and caused issues; its not a natural feeling to downshift when every automatic made in the last 30 years is DOWN to go lower and UP to go Higher. Now with paddle shifters I have found I am more flexible, once I remember that some vehicles have left and right and others do forward and back; I don't seem to have an issue.