2008 Mercedes SLK-Class Owner's Manual - Page 209

Controls in detail Audio system Storing stations Tune in desired station. Press and hold desired station button 1 to R until a brief signal tone is heard. The frequency is stored on the selected station button. The radio saves the current station at the memory preset selected. The memory preset selected appears in the status line, e.g. S3. 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 G i There are ten presets available. An existing entry is overwritten in the memory list when a new entry is given. 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. 208