2005 Mercedes C-Class Owner's Manual - Page 203

Controls in detail Audio system Calling up the ESN information menu Press INF soft key. Press ESN soft key. The twelve-digit electronic serial number (ESN) of the SAT tuner* installed in your vehicle is displayed. Press RET soft key to exit the menu. Safety precautions Warning! CD mode Warning! G G The single CD player and the CD changer* are Class 1 laser products. There is a danger of invisible laser radiation if the housing is opened or damaged. Do not open the housing. The single CD player and the CD changer* do not contain any parts that can be serviced by the user. For safety reasons, have any service work which may be necessary performed only by qualified personnel. In order to avoid distraction which could lead to an accident, the driver should insert CDs with the vehicle at a standstill and operate the audio system only if permitted by road, weather and traffic conditions. Bear in mind that at a speed of just 30 mph (approximately 50 km/h), your car covers a distance of 44 feet (approximately 14 m) every second. General notes The system may not be able to play audio CDs with copy protection. Playing copied CDs may cause malfunctions during playback. 201