00 00... Checking horn, headlight flashers and hazard warning flashers: Horn
WARNING: This page is about a different car, the 2010 BMW 650i, 2009 BMW 650i, and 2008 BMW 650i. 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.