Manufacturing defects
WARNING: This page is about a different car, the 2013 BMW X5, 2012 BMW X5, and 2011 BMW X5. However, it is still accessible from the selected car via links, so may be relevant.
CDs/DVDs may have manufacturing defects on the layer on which the digital information is recorded. Such CDs/DVDs cannot be played in the vehicle.
In the event of faulty playback, there is no fault in the CD/DVD changer. Because of the vibrations that occur, other demands are made on fault correction in the vehicle than in stationary operation.
In mobile applications, the control range of the laser tracking must therefore be limited in its capacity to compensate for surface flaws.