Mercedes-Benz E-Class w123 (1976 – 1985) – fuse box diagram

Year of production: 1976, 1977, 1978, 1979, 1980, 1981, 1982, 1983, 1984, 1985

Fuse box

Fuse	A	Circuit protected
A	16	Window Lift (Front Right/Rear Left)
B	16	Window Lift (Front Left/Rear Right)
C	16	Auxiliary Fan, Exploid Engine Residual Heat (123 545 ??00)
	25	Auxiliary Fan, Auxiliary Heating, Exploid Engine Residual Heat (123 545 ??00)
D	16	Sliding Roof
1	8	Parking and Tail Light Right, License Plate / Instrument / Hazard Warning Switch / Heater and Ventilation Controls (Rocker Switches / Shift Indicator / Electronic Radio) Illumination, Headlamp Cleaning Unit (123 545: 0200, 0500), Side Marker Lamps (123 545 0100), Warning Buzzer (123 545: 0400, 0800)
2	8	Clock, Trunk Light, Diagnostic, Roof Light Front and Rear, Hazard Warning System, Warning Monitor Terminal 5 / SF, Automatic Antenna, Switch-over Valve Seat Back Arrester, Illuminated Vanity Mirror, Standing Light Left and Right (123 545 0100), Electronic Radio, Relay II Power Windows Terminal 86+87 (123 545: 0200, 0500)
3	8	Parking and Tall Light Left
4	8	Cigarette Lighter, Glove Compartment Light, Radio, Outside Mirror (123 545: 0800, 1100)
	16	Seat heater front, Cigarette Lighter, Glove Compartment Light, Radio, Outside Mirror (123 545: 0800, 1100)
5	8	123 545 0100: Air Conditioning Compressor Switch, Over Valve Idle Stabilization 123 545: 0200, 0500: Fog Light 123 545 ??00: Fog Light, Rear Fog Light
6	16	Windshield Wiper and Washer, Optical Horn, Relay Headlamp Cleaning Unit (123 545: 0200, 0500)
7	8	High Beam Right, High Beam Indicator (123 545: 0100, 0200)
8	16	Blower Motor, Air Conditioning Compressor, Switch Over Valve Idle Stabilization (123 545: 0400, 0500, 0600, 0800), Circulating Pump Climate Control (123 545: 0400, 0500), Exploid Engine Residual Heat (123 545 ??00) 123 545: 0100, 0200: Heated Rear Window
	25	123 545: 0100, 0200: Heated Rear Window, Seat Heating Rear 123 545 ??00: Climate Control System, Blower Motor, Air Conditioning Compressor, Switch Over Valve Idle Stabilization, Circulating Pump Climate Control, Exploid Engine Residual Heat
9	8	High Beam Left, High Beam Indicator (123 545: 0400, 0500, 0600, 0800, 1100)
10	16	Heated Rear Window, Auxiliary Heating Rear (123 545: 1100, ??00), Electromagnetic Clutch Engine Fan (123 545: 0400, 0500, ??00) 123 545: 0100, 0200: Blower Motor
	25	123 545: 0100, 0200: Seat Heating Rear, Heated Rear Window, Auxiliary Heating Rear (123 545: 1100, ??00), Electromagnetic Clutch Engine Fan (123 545: 0400, 0500, ??00)
11	8	Low Beam Right, Fog Light
12	8	Stop lamp, Turn signal lamp, Instrument Cluster, Cruise Control, Relay Window Lift Terminal 86, Tachometer, Relay Auxiliary Fan Terminal 86 (123 545: 0100, 0200, 0400), Control Unit/Heating Water Valve for Climate Control System (123 545 0400), Switch Over Valve Idle Stabilization (123 545 0200), Air Conditioning Compressor (123 545 0200), Relay II Power Windows Terminal 87 a (123 545: 0200, 0500), Climate Control System (123 545 ??00)
13	8	Low Beam Left
14	8	Back-up Lamp, Warning Monitor Terminal 8 / 15, Emission Control, Horn, Fanfares, Overload Protection, Automatic Transmission, Relay Auxiliary Fan Terminal 86, Control Unit/Water Pump/ and Heating Water Valve for Climate Control System, Carburetor Heater (123 545: 0100, 0200, ??00), Exploid Engine Residual Heat Terminal 15 (123 545 ??00), Temperature Gauge Outside (123 545 ??00), Float Chamber Vent Valve (123 545 ??00), Idle Cut-off Valves

Fusecard

123 545 01 00

123 545 02 00

123 545 04 00

123 545 05 00

123 545 06 00

123 545 08 00

123 545 11 00

 

WARNING: Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.

Mercedes E class w123  (240D, 300D, 300TD, 280E and several other models of Mercedes copes, sedans and wagons from model years 1977 – 1985) – fuse box diagram (123 545 11 00)

Year of production: 1977, 1978, 1979, 1980, 1981, 1982, 1983, 1984, 1985

Fuse box

 

Fuse	Ampere rating [A]	Colour	Description
a	16	red	(Window lift front right and rear left)
b	16	red	(Window lift front left and rear right)
c	16	red	(Auxiliary fan)
d	16	red	(Sliding roof)
1	8	white	Parking/tail lights right/warning buzzer/license plate/instrument/hazard warning switch/heater and ventilation controls/rocker switches/shaft indicator (electronic radio)-illumination
2	8	white	Clock, trunk light, diagnostic, switch-over valve seat back arrester,  roof light front and rear, hazard warning system, automatic anenna, illuminated vanity mirror, warning monitor term 5, (electronic radio)
3	8	white	Parking and tail light left
4	8	white	Cigar lighter, glove compartment light, outside mirror,  radio
	16	red	Seat heating front
5	—	—	Not used
6	16	red	Windshield wiper and washer, optical horn
7	8	white	High beam right
8	25	blue	Blower motor, air conditioning compressor
9	8	white	High beam left, high beam indicator
10	16	red	Heated rear window (auxiliary heating rear)
	25	blue	Seat heating rear
11	16	red	Low beam right, fog light
12	8	white	Stop lamp, turn signal lamp, instrument cluster, relay window lift term. 86, cruise control, tachometer
13	8	white	Low beam left
14	8	white	Back-up lamp, warning monitor terminal 8, emission control, horn,  switch – over valve overload protection device, autom. transmission relay auxiliary fan. term. 86, control unit/water pump/heating water valve for climate system

WARNING: Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.

Mercedes E class w123 – 240D (1982) – fuse box diagram (123 545 06 00)

Fuse	Ampere rating [A]	Colour	Description
a	16	red	Window lift (Front right and rear left)
b	16	red	Window lift (Front left and rear right)
c	16	red	Auxiliary fan
d	16	red	Sliding roof
1	8	white	Parking and tail lights right, license plate/instrument/hazard warning, switch/heater and ventilation controls (rocker switches/shift indicator/electronic radio)
2	8	white	Clock, trunk light, diagnostic, roof light front and rear, hazard warning system, warning monitor term.  5, automatic anenna, switch-over valve, seat back arrester
3	8	white	Parking and tail light left
4	8	white	Cigar lighter, glove compartment light, radio
	16	red	Cigar lighter, glove compartment light, radio, seat heating front
5	—	—	Not used
6	16	red	Windshield wiper and washer, optical horn
7	8	white	High beam right
8	16	red	Blower motor, (Air conditioning compressor, switch over valve idle stabilization)
9	8	white	High beam left, high beam indicator
10	16	red	Heated rear window
11	16	red	Low beam right, fog light
12	8	white	Stop lamp, turn signal lamp, instrument cluster, cruise control (relay window lift term. 86, tachometer
13	8	white	Low beam left
14	8	white	Back-up lamp, warning monitor terminal 8, emission control, horn, overload protection (auto trans.(, relay auxiliary fan terminal 86, control unit, water pump and heating water valve for climate control system

WARNING: Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.

Mercedes w123 – 300d (1987) – fuse box diagram

Fuse	Ampere rating [A]	Circuit protected
1	16	Auxiliary fan
2	8	Clock, Turn signal/hazard lamps, Radio, Power seats, Warning system, Courtesy lamps, Illumination Cluster/Center Console
3	30	Rear defogger
4	8	Headlamps (High low beam)
5	8	Automatic Climate Control, Transmission kick-down, Stop lamps/Backup lamps, Auxiliary fan
6	8	Courtesy lamps, Ani-lock brake system, Stop lamps/Backup lamps, Cruise control, Warning system, Warning indicators
7	8	Horn, Rear defogger,  Turn signal/hazard lamps
8	16	Outside heated mirrors, Anti-theft alarm system
9	8	Lamps: Park/TailMarker/License
10	8	Fog lamps
11	8	Headlamp wiper/washer, Lamps: Park/TailMarker/License, Illumination instrument: cluster, central console
12	8	Headlamps (Left: Low beam)
13	8	Headlamps (Right: Low beam, indicator)
14	8	Headlamps (Left: High beam)
15	8	Central locking system, Anti-theft alarm system, Power seats, Courtesy lights, Truck lamps, Automatic Antenna
16	25	Blower control/ Not used
17	16	Headlamps/Fog lamps, Wiper/washer, Headlamps wiper/washer, Power windows, Power seats
18	8	Glove box lamp, Wiper/washer (washer jet heaters), Front cigar lighter, Radio
19	16	Sliding roof, Heated seats, Orthopedic seats
a	25	Power seats
b	25	Power seats
c	25	Power Windows
d	25	Power Windows

Relays

Relay code	Relay use
A	Exterior lamp Failure Monitoring Unit
B	Combination Relay (Turn signal, hazard lamps, wiper/washer)
C	High speed relay (auxiliary fan)
D	Low speed relay (auxiliary fan)
E	Air pump Clutch (Electronic engine control/air injection management) – gasoline engine only
F	Headlamp washer relay (Headlamp Wiper/washer)
G	Power seat diode (Power seats)
H	Power seat relay
I	Power window relay (power windows)
K	Auxiliary fuse holder (Anti-theft alarm system)

 

WARNING: Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.

Mercedes w123 – 280E (1977) – USA Version – fuse box diagram

Fuse	Ampere rating [A]	Colour	Description
a	16	red	Power windows a front right/rear left
b	16	red	Power windows a front left/rear right
c	16	red	Auxiliary fan
	25	blue	Auxiliary heating
d	16	red	Sliding roof
1	8	white	Parking/tail lights right, license plate/instrument/hazard warning switch/heater and ventilation controls/(rocker switches, shift indicator), illumination, side marker lamps
2	8	white	Standing light left and right, clock, trunk light, roof light front and rear, hazard warning system, warning monitor term. SF, (automatic anenna)
3	8	white	Parking/tail light left
4	8	white	Cigar lighter, glove compartmentlight
	16	red	Radio, seat heating front
5	8	white	Air conditioning compressor switch over valve idle stabilization
6	16	red	Windshield wiper and washer, optical horn
7	8	white	High beam right, high beam indicator
8	16	red	Heated rear window
	25	blue	Seat heating rear
9	8	white	High beam left
10	16	red	Blower motor
11	16	red	Low beam right, fog light
12	8	white	Stop lamp, turn signal lamp, instrument cluster, relay auxiliary fan term. 86, (relay power window term. 86 cruise control)
13	8	white	Low beam left
14	8	white	Back-up lamp, carburetor heater, idle cut-off valves, emission control, warning monitor term. 15, automatic transmission, horn, (fanfares)

 

WARNING: Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.