Abbreviations and designations used in electrical circuits (Mercedes-Benz M-Class W163)

Due to space limitations, this manual provides complete wiring diagrams only for the ML 430 models (163.172). Additionally, engine control system diagrams are provided for the ML 320 (163.154) and ML 500 (163.175) models.

Abbreviations used in diagrams
AT	Automatic transmission
D/V	Sensor switch
K/V	Air conditioner
K/L	Control lamp
PR-L	Fuse
Manual transmission	Manual gearbox
Heating element	Thermoelectric heating element
EM	Electromagnetic
E/MOTOR	Electric motor
ELECTRIC DRIVE	Electric drive
AAM	General Activity Module
ABS	Anti-lock brake system
ACSR	(System) of registration of installation of a child seat
AIR	(System) of secondary air mixing
ATA	Anti-theft system
ASR	Anti-slip (system)
ATA	Anti-theft (system)
BAS	Emergency Brake Assist
DLC	Diagnostic connector
DRL	(System) of daytime running lights
CAN	Controller network
CAN H/L	Inverted (0 and 1) CAN bus signals
CKP	(Sensor) of crankshaft position
EAM	Extended Activity Module
ECM	Engine Control Module
ECL	(Sensor) Engine Coolant Level
ECT	(Sensor) coolant temperature
EGR	Exhaust gas recirculation (system)
ESP	Anti-skid system
ETC	Electronic transmission control system
ETR	Emergency seat belt tensioner
ETS	Electronic traction control system
EVAP	Fuel Evaporative Mist Recovery System
FBM (DAS)	(Driver Authorization System)
HCS	Headlight washers
IAT	(Sensor) intake air temperature
KS	Knock sensor
MAF	Hot-wire air mass sensor
MIL	Failure indicator light
RCL	Remote control of a single lock
RPM	Revolutions per minute
SPS	Speed sensitive power steering
SRS	Additional security system (airbags)
VSS	Vehicle speed sensor
Electrical Wiring Insulation Color Codes
Code	Color
BLK	Black
BLU	Blue
BRN	Brown
GRN	Green
GRY	Grey
NCA	Any
ORG	Orange
PNK	Pink
PPL	Purple
RED	Red
TAN	Golden
VIO	Violet
WHT	White
YEL	Yellow
Designation and purpose of terminals and pins
-	Minus.
+	Plus.
12VCD	Battery or voltage regulator voltage with the engine running.
15	Switched battery power (served in positions 2 and 3).
15g	Switched battery power (protected by a fuse).
15R	Switched battery power (served in positions 1, 2 and 3).
15u	Switched battery power (not protected by a fuse).
15X	Switched battery power (served in position 2).
15Z	Switched battery power (served in positions 2 and 3).
15C	Switched battery power (is supplied before the key is removed).
15X	Switched battery power (served in position 2).
30	Non-disconnectable battery power supply.
30z	Terminal 30, 1st input signal.
30Z	Battery switching voltage (served in positions 2 and 3).
30a	Non-disconnectable battery voltage.
30A	Non-disconnectable battery voltage (side "A").
30V	Non-disconnectable battery voltage (side "B").
30E	Non-disconnectable battery voltage for electronics.
31	Grounding.
31b	Switched connection to the chassis.
31st	Grounding for electronics.
49	Direction indicator input signal.
49	Breaker signal.
49a	Direction indicator output signal.
49L	Left turn signal.
49R	Right direction indicator.
49a	Pulse interrupter signal.
50	Starter traction relay signal.
53	Input signal (+) of the windshield wiper drive motor.
53	Low speed windshield wiper mode.
53b	Shunt winding of the windshield wiper drive electric motor.
53b	High-speed windshield wiper mode.
54	Brake light chain.
55	Fog lamps.
56	Rear side/parking lights.
56a	High beam chain.
56b	Low beam chain.
58	Rear side/parking light, instrument and number plate light circuit.
58d	Adjustable instrument lighting.
58k	Instrument lighting (unprocessed).
58L	Left parking light.
58R	Right parking light.
61	Generator indicator light.
61st	Generator working signal.
81	Reverse gear signal.
81a	Reverse gear signal (after shifting the transmission).
85	Winding output to (-) or body.
85EDC	Relay control signal, electronic control of diesel engine.
85F	Horn relay control.
85LP	Air pump relay control.
86	Conclusion of the beginning of the winding.
86KR	Fuel pump relay control.
87	Input signal.
875A	Power supply for additional equipment.
87a	First output signal (contact side NC).
87ABS	ABS power supply.
87b	Second output signal.
87c	Third output signal.
87EGAS	Supply voltage of the electronic gas pedal (EA).
87GES	Battery voltage (protected by a fuse).
87KP	Fuel pump supply voltage.
87LP	Air pump supply voltage.
87ME1	87 control unit 1.
87ME2	87 control unit 2.
87MOTR	Supply voltage of the injection system control unit.
87UG	Relay output (not protected by a fuse).
87Z	Relay output (protected by a fuse).