BMW Quadlock connector pinout diagram @ pinoutguide.com

Car stereo pinout for BMW models after 2004, the radio module E60/E61 M-ASK and CCC

pin	connector A	connector B	connector C
1	Speaker FR+	mic+	fan+
2	Speaker RR+	gnd	aux L
3	Speaker RL+	R	zbl+
4	Speaker FL+	G/CVBS	zbr+
5	Speaker FR-	B	fan-
6	Speaker RR-	mic-	tel+
7	Speaker RL-	-	aux R
8	Speaker FL-	-	aux gnd
9	CAN L	-	zbr-
10	tel mute	-	zbl-
11	CAN H	-	diag
12	masa	dfahl	tel-
13	radio on	x	x
14	backlight	x	x
15	+12V	x	x
16	-	x	x

pin	connector A	connector B	connector C
1	Speaker FR+	line out L	tape in L+
2	Speaker RR+	cd-changer line in gnd	tape in L-
3	Speaker RL+	line out GND	AUX L
4	Speaker FL+	vcr line in R+	AUX R
5	Speaker FR-	vcr line in L+	navi/tv in +
6	Speaker RR-	vcr line in gnd	telefon +
7	Speaker RL-	line out R	tape in R+
8	Speaker FL-	cd changer line in L+	tape in R-
9	I-BUS	cd changer line in R+	navi bus
10	tel mute	tv line in R+	AUX GND
11	tel in	tv line in L+	navi/tv in -
12	gnd	tv line in gnd	telefon -
13	amplifier remote	x	x
14	backlight	x	x
15	+12V	x	x
16	+12V ACC	x	x

Pin Notation	Pin function
Power pins
B+	Battery+ (12V direct from Battery).
GND, GROUND	Chassis Ground
ACC	Ignition powered. +12 V with the ignition key is in the ACC or ON position.
ILL	Backlight adjustment
+ANT	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-	The corresponding speaker ground
Misc. pins
T-M	This pin is used to silence the audio, earthed by some other external components that is connected to the radio.
GALA,GAL, GA, SCV	This pin is used in some radio equipment to automatically boost up the volume. It needs the output from the speed sensor.
Amp	Amplifier control
CAN-L, CAN-H	CAN bus
CDC	CD-changer audio