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Notes on head-up display

NOTE: A special windshield must be fitted to ensure that the Head-Up Display image can be projected correctly.
This windshield comprises three sections. An outer and an inner glass pane are connected by a wedge-shaped plastic film.
The wedge shape prevents double projection of the Head-Up Display.
When the windshield is replaced, the vehicle identification number and applicable BMW parts catalogue must be checked to ascertain whether the windshield in question is suitable for HUD  .
G08487513Courtesy of BMW OF NORTH AMERICA, INC.

Example of the display with a conventional windshield: 

With a conventional windshield, the projected image is reflected on the inner and outer glass pane, producing a double image.

G05478790Courtesy of BMW OF NORTH AMERICA, INC.
NOTE: Windshields for Head-Up Display, for vehicles with model year up to 2012, are marked with the letters "HUD" on the outside at the bottom right below the seal (1)  .