BMW M4 COUPE Owner's Manual page 168

CONTROLS
Visibility of the display
The visibility of the displays in the Head-up Dis‐
play is influenced by the following factors:
▷ Seat position.
▷ Objects on the cover of the Head-up Display.
▷ Sunglasses with certain polarization filters.
▷ Wet road.
▷ Unfavorable light conditions.
If the image is distorted, have the base settings
checked by a dealer's service center or another
qualified service center or repair shop.
Special windshield
The windshield is part of the system.
The shape of the windshield makes it possible to
display a precise image.
A film in the windshield prevents double images
from being generated.
For this reason, it is strongly suggested to have
the special windshield replaced by a dealer's
service center or another qualified service center
or repair shop, if necessary.
Shift lights
Principle
The Shift lights in the instrument cluster indicate
the maximum shift point at which the best possi‐
ble acceleration can be achieved.
General information
If the Head-up Display is switched on, the Shift
lights will be displayed in the Head-up Display.
Shift lights are only shown in the Head-up Dis‐
play in the M view.
If the Head-up Display is switched off, the Shift
lights are displayed in the instrument cluster.
168
Displays
Online Edition for Part no. 01405A38097 - VI/21
Shift lights in the instrument
cluster
▷ Current engine speed is displayed in the
tachometer.
▷ Arrow 1: successive yellow illuminated fields
indicate the upcoming shift moment.
▷ Arrow 2: fields are illuminated in red. Do not
wait any further to shift.
When the maximum RPM is reached, the entire
display flashes. The fuel supply is reduced to
protect the engine.
Shift lights in the Head-up
Display
▷ Current engine speed is displayed in the
tachometer.
▷ Arrow 1: successive yellow illuminated fields
indicate the upcoming shift moment.
▷ Arrow 2: fields are illuminated in red. Do not
wait any further to shift.
When the maximum speed is reached, the entire
display flashes red and the fuel supply is inter‐
rupted in order to protect the engine.