137 Audio system
Technical
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index Cassette mode 
Note:
Vehicles equipped with the COMAND system do not 
come with a factory installed cassette mechanism. 
A standard 1/8” stereo phono plug for auxiliary audio 
input (located in glove box) is provided for connection of 
a portable battery operated cassette player or any other 
portable device which uses a headphone output. Please 
refer to the COMAND operating manual for information 
concerning the activation of the audio input.
Playing cassettes
Press the “TAPE” button. When the eject (EJ) key is 
pressed, the display folds down and the cassette slot 
becomes visible. Push the cassette into the slot until it 
engages. The cassette will be pulled in automatically.
Notes:
Do not press directly on the radio display face.
Return the display panel to its normal position by 
folding it back up and pressing gently on the display 
frame to lock in place. When playing mono recorded tapes (e.g. books) through 
a stereo system the sound from one track might bleed to 
the other track, despite setting the balance to the full 
left or full right speakers.
Important!
If the display is in the down position for more than 
20 seconds, 2 successive beeps will be heard. This will 
continue at 5 second intervals until the display is 
returned to its normal position.
The radio will switch to 
cassette mode. Track 1 will be 
played and “SIDE 1” 
displayed. Track 1 is the side 
of the cassette which is facing 
upwards. The cassette deck will automatically detect the 
type of tape and switch the equalization automatically. 
A cassette symbol in the display indicates that a tape is 
in t he m echan ism . This  sy mbol app ears i n all m ode s but 
not in cassette mode.
The cassette will not be ejected when the radio is 
switched off or another mode is selected.
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