00 00... Checking horn, headlight flashers and hazard warning flashers: Horn
WARNING: This page is about a different car, the 2013 BMW X5 M, 2012 BMW X5 M, 2011 BMW X5 M, and 2010 BMW X5 M. 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.