Mercedes customers can, if desired, combine the infotainment facilities for the CLS with other systems:

The Logic7 surround sound system developed by Mercedes-Benz together with the audio specialists harman/kardon® delivers an outstanding performance with three-dimensional sound as a natural 360-degree musical experience for all passengers.
iPods, USB sticks or other external audio devices can link to the infotainment system of the new Mercedes CLS through a media interface in the stowage compartment in the centre console.
A separate DAB tuner (DAB = Digital Audio Broadcasting) and additional aerials (optional) allow passengers on board the new CLS to receive digital radio stations in CD quality. The system switches to analogue reception automatically when the DAB signal is too weak.