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42 pin (8+8+18+8) Mercedes Comand ISO / proprietary connector layout
Разъем 42 pin (8+8+18+8) Mercedes Comand ISO / proprietary
p/n A 203 820 96 89 80

Head unit pinout abbreviations

Pin
Notation
Pin function

Power pins

BAT Battery+  (12V direct from Battery). 
GND, GROUND Chassis Ground
KL.15 Ignition powered. +12 V with the ignition key is in the ACC or ON position.
iLLUM Light-on signal or backlight adjustment. +12V supplied to light-on pin of head unit when tail lights ar turned on.
ANT OUT Power for Electric Antenna. Output +12 V (maximum 150 - 300mA) 

Audio pins

FR+ or RF+ Front right speaker out
FL+ or LF+ Front left speaker out
RR+ Rear right speaker out
LR+ or  RL+ Rear left speaker out
FR- or RF-, FL- or LF-, RR-, LR- or RL-, SGND The corresponding speaker ground

Misc. pins

MUTE This pin is used to silence the audio, earthed by some other external components that is connected to the radio.
GAL This pin is used in some radio equipment to automatically boost up the volume. It needs the output from the speed sensor.
CAN-L, CAN-H CAN on board diagnostic bus
K-Line K-line on board diagnostic bus

 

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