63 12... Headlight fogging fault pattern

WARNING: This page does not describe the selected car, but rather 50 other vehicles, including the 2016 BMW M5, 2016 BMW ActiveHybrid 5, 2016 BMW 550i xDrive, 2016 BMW 550i, and 2016 BMW 535i xDrive. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Certain weather conditions can lead to fogging on the inside of the headlight lens.
This is not necessarily a fault that requires replacement of the headlight.

Fig 1: Identifying Headlights Fogging (Permissible And Impermissible)

Courtesy of BMW OF NORTH AMERICA, INC.

Permissible fogging. Headlight does not need to be replaced.
Impermissible fogging. Replace the headlight.