00 00... Checking horn, headlight flashers and hazard warning flashers: Horn
WARNING: This page is about a different car, the 2011 BMW Z4, 2010 BMW Z4, and 2009 BMW Z4. 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.