Check horn, headlight flashers and hazard warning flashers

WARNING: This page is about a different car, the 2025 BMW M4, 2024 BMW M4, 2023 BMW M4, 2022 BMW M4, and 2021 BMW M4. However, it is still accessible from the selected car via links, so may be relevant.

Operate the horn and check the function of both fanfare horns.
Operate the headlight flasher, check the function of the high beam headlight and blue indicator light in the instrument cluster (KOMBI).
Check function of hazard warning lights system.