Radio mode, function

N82.60-2207-09

Shown with code (EH3) Portable CTEL preinstallation, networked, with code (EP5) CD changer and with code (JK3) High-end instrument cluster standard with speedometer in km

A1 Instrument cluster

A2 Radio (SOUND 20)

A2/6 CD player with changer

A2/18 FM and AM amplifier

S110 Multifunction steering wheel button group, right

S111 Multifunction steering wheel button group, left

A2/51 Window antenna

A35/13 Telephone transmitter/receiver

N73 EIS [EZS] control unit

Radio reception, function

The FM and AM amplifier (A2/18) receives the frequency-modulated and the amplitude-modulated high frequency (HF) signals, filters the frequencies of the radio frequency bands and amplifies them. Subsequently, all amplified high frequency signals are transmitted via a screened line to the radio receiver in the radio (Sound 20) (A2).

The radio receiver demodulates the HF signals, in other words it separates the useful information (audible frequencies) from the carrier signal (inaudible). The demodulated audio signals are amplified and converted into sound signals by the vehicle speakers.

-----------------------------------------------------------------------------------------

Different ways of tuning in stations:

 Tuning using station preset

 Tuning by program type list

 Tuning via frequency list

 Tuning by station search

 Tuning by means of station search on the multifunction steering wheel, with code (JK3) High-end instrument cluster standard with speedometer in km

 Tuning by "Autostore" memory

 Tuning by "Scan" search (the stations of a waveband are played for t = 8 s)

 Manual tuning

 Tuning by manual frequency input (via the 12-button control panel of the radio (Sound 20) (A2))

-----------------------------------------------------------------------------------------

The following functions are also available (they appear on the radio (Sound 20) (A2) display):

 Noise reduction

 Radio Data System (RDS), function

 Selection of RDS stations with good reception

"RDS" function (regional operation)

Apart from radio programs, many radio stations (e.g. in the FM range) broadcast additional, non-audible digital information such as station name, program type (e.g. pop, culture) and traffic program identification. This information is evaluated by the radio (Sound 20) (A2) and shown on the display if the following prerequisites are met:

 The "RDS" function is activated

 An "RDS" station is tuned