00 00... Checking horn, headlight flashers and hazard warning system: Horn
WARNING: This page is about a different car, the 2002 BMW M Roadster, 2002 BMW M Coupe, 2001 BMW M Roadster, and 2001 BMW M Coupe. However, it is still accessible from the selected car via links, so may be relevant.
Check function.
NOTE:
In the case of twin-tone fanfares, make sure that both fanfares are working properly.