Mercedes-Benz M-Class W163 (1997-2005) – fuse and relay box

Diagrams of fuse boxes and relays – Mercedes-Benz M-Class W163

Applies to vehicles manufactured in the years:

1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005.

The cigarette lighter in the Mercedes-Benz M-Class W163  is fuse number 10 in the fuse box in the engine compartment.

Fuse and relay box, rear left engine compartment (up to 08/31/01)

Mercedes-Benz M-Class w163 – fuse box diagram – engine compartment
Number
Description Amperes [A]
1 Internal socket (X58 / 1) 15
2 Instrument cluster (A1):

Left front turn signal (A1e1);

Left front turn signal (E1):

Left turn signal (E1e5)

Left left rear light (E3):

Left turn signal (E3e1)

Left Auxiliary Turn Signal (E22 / 1)

Inner connection sleeve, circuit L (Z53 / 4)

Trailer hitch connection (X52)

7.5
3 Right Headlight Assembly (E2):

Right high beam (E2e1)

15
4 Power supply for sliding / tilting roof (SHD), circuit 30:

Sliding / Tilting Roof (SHD) Motor (M12)

30
5 Left Headlight Assembly (E1):

Left high beam (E1e1)

Powder instrument (A1):

High beam indicator lamp (A1e3)

7.5
6 Rear door wiper motor (M6 / 4) 7.5
7 Combined switch (S4):

Hazard light switch (S6 / 1s1)

Windshield washer system switch (S4s4)

Wiper switch (S4s5)

Wiper motor (M6 / 1)

Relay K17:

Windshield Wiper Periodic Relay.

15
8 Transfer case control unit (N78) 25
9 Instrument cleaning tool (A1);

Number plate lighting:

Left license plate light (E19 / 3V);

Right rear number plate light (E19 / 4);

Number plate light, left spare wheel holder (E19 / 5);

License plate lamp, right spare wheel holder (E19 / 6);

Cockpit connector bushing, drcuit 58d (Z50 / 1):

Left window switch  (S21 / 13y);

Right window switch (S21 / 14) (light emitting diodes);

Left front SIH switch (S51 / 1);

right front SIH switch (S51 / 2) (light emitting diodes);

Heater / AC Switch (S98) (Light Emitting Diodes);

2 position switch combination (S97 / 6) (light emitting diodes);

ESP OFF switch (S76 / 6) (light emitting diodes);

Folding and unfolding mirror switch (S50 / 1) (light emitting diode);

Electric headlamp leveling switch (SI / 1) (light emitting diode);

Rear Window Wiper / Washer Switch (S78) (Light Emitting Diode);

Roof switch (S13 / 2) (light emitting diode);

Reverse light switch (S16 / 2);

Lighting (R3e1);

Center console switch group (S21).

7.5
10 Radio (A2);

Roof connector sleeve, circuit 15R (Z54 / 1):

Left sun visor with illuminated mirror (Е14 / 1);

Right sun visor with illuminated mirror (E14 / 2);

On-board computer control unit (N41);

Automatic dimming. Interior rearview mirror (H7);

Front cigarette lighter  (with ashtray illumination) R3:

Heating element (R3r1);

Glove box lamp (E13 / 1);

Instrument cluster (A1):

Airbag indicator and warning lamp (A1e15).

10
11 Hot foil mass air flow sensor (B2 / 5);
Camshaft position sensor (L5 / 1);
Fuel injection valves (Y62);
For M111:
• HFM control module (N3 / 4).
10
12 Inner connection sleeve, circuit 58L (Z53 / 6):

• Trailer hitch connection (X52);

• Left rear light (E3);

• Left rear light and parking light (E3e2);

Left Headlight Assembly (E1):

• Left position and parking light (E1e3);

• Left marker lamp (E1e6).

7.5
13 Roof fastener bushing, circuit 30 (Z54 / 2):
• Front dome lamp (with switch-off delay and front reading lamp) (E15 / 2);
• Rear interior lamp (E15 / 3);
• dome lamp on the rear left side (E15 / 8);
• Dome lamp Rear right (E15 / 9);
• On-board computer control unit (N41);Instrument cluster (A1): • Seat belt warning light (A1E9);
Steering angle sensor (N49);
Data interface (X11 / 4).
10
14 Diesel:
Injection control device;Exhaust gas recirculation valve.
10
15 Inner junction sleeve, circuit 54 (Z52 / 6):
Left-hand brake light (E3):• Left brake light (E3e4);Right rear light (E4):
• Right brake light (E4e4);
• Center high brake light (E21);
• Center high mounted brake light, spare wheel holder (E35);
• Trailer hitch connection (X52).
10
16 Diagnostic connector (X11 / 4)
Reversing light switch (S16 / 2)
Cockpit connector sleeve, circuit 15 (Z50 / 2):
• Air conditioning control unit (N19);
• Heating / AC switch (S98);
• Blower switch (S98s1);
• Thermostat (S98p1);
• Air recirculation switch, Indicator lamp (S98h1);
• Lighting (S98e1);
• Lighting switch (S98e2);
• Air recirculation switch (S98s2);
• Air conditioning switched on indicator light (S98h2);
• Lighting switch (S98e2);
• Air conditioning switch (S98s3);
• Air recirculation flap actuator motor (M39);
• Air conditioning control unit (N19).
15
17 Cargo area junction box (X58 / 4) 15
18 Trailer hitch connection (X52) 25
19 M111:
HFM control module (N3 / 4);
Adjustable Camshaft Timing Solenoid (Y49);
Activated charcoal filter shut-off valve (Y58);
M112 / 113:
Compression fitting 87 M2e (Z7 / 36);
• intake manifold reversing valve (Y22 / 5);
• EGR switchover valve (Y27);
• Air pump vacuum valve (Y32);
• O2 lambda probe – left, in front of the catalyst. (G3 / 3);
• O2-Right oxygen sensor, in front of the catalyst. (G3 / 4)
Purge Control Valve (AKF) (Y58 / 1);
O2-Left oxygen sensor, behind the catalyst. (G3 / 5);
O2-right oxygen sensor, behind the catalyst. (G3 / 6);
M113:
1Y80 cylinder shut-off valve;1Y80 cylinder shut-off valve.
15
20 Left electrically adjustable and heated outside mirror (M21 / 1), right electrically adjustable and heated outside mirror (M21 / 2);

Mirror heater.

15
21 With sound system: Sound
amplifier (A2 / 13);
Radio (A2).
25
22 Inner coupling sleeve, circuit 15 (Z51 / 5)
• ETC [EGS] control module (N15 / 3);
• Transmission range recognition switch (S16 / 10);
• Locking solenoid valve, reserve / parking pawl (Y66 / 1);
• Transfer case control (N78);
• Traction systems control unit (N47);
With ESP:
• Steering angle sensor (N49);Instrument cluster (A1) (F1k3) Fuel pump relay;Cruise control button (S40);With M111:
HFM-SFI (N3 / 4) control unit;
With M112 / 113:
Motor electronics control unit (N3 / 10).
23 Reserve
24 Inner connector sleeve, circuit 58R (Z52 / 4):
• Trailer hitch connector (X52); Right Headlight
Assembly (E2):
• Right Side Lamp and Parking Light (E2e3);
Right rear light (E4):
• Right rear light and parking light (E4e2);
Right side marker lamp (E2e6).
7.5
25 Right Headlight Assembly (E2): • Right turn signal light (E2e5);
Right rear light (E4)
• Right turn signal light (E4e1);
Right auxiliary turn signal (E22 / 2);
Traction system controller (N47);
Inner connector sleeve, Circuit R (Z53 / 5):
• Trailer hitch connector (X52)Instrument cluster (A1): • Right turn signal lamp (A1e2).
7.5
26 Connector, circuit 15 with fuse (Z3 / 29):
• M111 (T1) ignition coils;
• M112 (T1) ignition coils;
• M113 (T1) ignition coils.
15
27 Traction systems control unit (N47) 40
28 Heated Seats Inner Sleeve (Z53 / 8):
Left / Right Heated Seats Supply:
• Heated Seats Relay, Stage 1 (K59);
• Heated seats relay, stage 2 (K59 / 1);
• Heated left front seat cushion (R13 / 1) / Heated right front seat cushion (R13 / 3);
• Heated left front seat cushion (R13 / 2) Heated right front seat cushion (R13 / 4).
20
29 Switch group in the center console (S21):
• Right windscreen switch (S21s2);
• Right windshield motor (M10 / 4);
• Left rear window switch (S21s3);
Switch combination, power windows, rear center console (S21 / 15):
• Left rear window switch (S21 / 15s1);
• Electric window motor: rear left (M10 / 5);
Relay 16:
Right front power window (F1k16).
30
30 Center console switch group (S21):
• Left windshield switch (S21s1);
• Right rear window switch (S21s4);
Switch combination, power windows, rear center console (S21 / 15):
• Right windscreen switch (S21 / 15s2);
Relay 18:
Left front power window (F1k18).
30
31 Center console switch group (S21):
• Switch, electric adjustment of outside mirror (S50);
Cockpit connector sleeve, tilting window (Z50 / 13):
Rear tilting window:
• Left tilting window switch (S21 / 13);
• Right tilt window switch (S21 / 14);
Sliding / tilting roof switch (S13 / 2).
15
32 Right Front Seat Adjustment Switch (S23)
Right Front Seat Adjustment Motor Assembly (M26)
• Forward / Reverse motor (M26 / m1);
• Motor up / down rear (M26 / m2);
• Motor up / down front (M26 / m3);
• Backrest motor front / rear (M26 / m5).
30
33 Left Front Seat Adjustment Switch (S22)
Seat Adjustment Motor Group:
Left Front (M25).
30
34 Left Headlamp Assembly (E1):
Left Low Beam (E1e2) (S1 / 1 Electric Headlamp Range Control);
Left headlight range adjustment motors (E1m1), right headlight range adjustment motors (E1m2).
7.5
35 Right front lamp unit (E2):
Right low beam (E2e2).
7.5
36 Rear window heating 25
37 Fanfare indicators:

• Two-tone signaling system (H1);
• Two-tone signaling system, hom 2 (H1 / 1).

20
38 Fuel pump with fuel level sensor (M3 / 3) 20
39 Reserve
40 Vacuum pump (M 612.963) 25
41 Circulation pump relay (F1k19)

Sleeve connecting the right engine compartment, pump (Z57 / 2):
• Circulation pump for coolant (M13);
• Blower motor for the module box (M2 / 2);

Diesel:
Stationary heater.

25
42 Central locking:
• Central locking motor of the left front door (M14 / 6);
• Central locking motor of the right front door (M14 / 5);
Connecting sleeve, inside central locking (Z53 / 1):
• Rear door central locking motor (M14 / 7);
• CL [ZV] motor of the left rear door (M14 / 8);
• CL [ZV] engine of the rear right door (M14 / 9);
• CL [ZV] fuel filler flap motor (M14 / 10).
20
43 Heater blower relay (F1 k21);
Blower motor (М2).
30
44 Engine fan relay, stage 1 (Flk26);
Engine fan relay, stage 1 (F1k26);
Left engine compartment connector sleeve, fan (Z56 / 2);
• Left auxiliary fan (M4m1);
• Right additional fan (M4m2).
30
45 Electric Air Pump (M33) 40
46 Cockpit connector bushing, rear fog lamp (Z50 / 10):
• 2-position switch combination (S96 / 7) (rear fog light LED);
Left rear light (E3), right rear light (E4);• Left rear fog light (E3e5), right rear fog light (E4e5);Trailer hitch connection (X52).
7.5
47 Left connector in the engine compartment, auxiliary headlight (Z56 / 4)
Left front headlight (E1):
• Left fog light (E1e4)
• Left auxiliary high beam (E1e7), right auxiliary high beam (E2e7)
Right front headlight (E2)
15
Relays
K1 Heated rear window relay
K2 Fan Relay Module (K39)
K3 Electric fuel pump relay (except engine 612.963)
K4 Left turn signal relay
K5 Circuit 58 of relay, license plate light / instrument cluster
K6 Electronic Stability Program (ESP) / Stop Lamp Off Relay
K7 Right turn signal relay
K8 Starter relay (solenoid switch, terminal 50)
K9 Relay circuit 58R (right floor lamp)
K10 Reserve
K11 Delayed Relay Circuit 15 (engine 612.963 only)
K12 Circuit 15 of the relay
K13 Relay circuit 58L (left floor lamp)
K14 Comfort relay
K15 Central locking relay, tailgate unlock
K16 Right windshield relay
K17 Front wiper relay, intermittent
K18 Left windshield relay
K19 Heater circulation pump relay and box fan fuse and relay box
K20 Central locking relay: Lock all doors
K21 Heater blower relay
K22 Dipped beam and contact relay
K23 Central locking relay: Unlock the front passenger door, rear door and the fuel tank flap
K24 Central locking relay: Unlocking the driver’s door
K25 ETS / ESP hydraulic unit relay
K26 Engine fan relay, stage 1, with air conditioning
K27 Reserve
K28 Secondary air injection pump relay
K29 Rear fog lamp relay

Fuse and relay box, rear left engine compartment (as of 09/01/01)

Mercedes-Benz M-Class w163 – fuse box diagram – engine compartment
Number
Description Amperes [A]
1 Not assigned
2 Instrument cluster (A1):

• Left turn signal (A1e1)
Left front turn signal (E1):
• Left turn signal (E1e5)
Left rear turn signal (E3):
• Left turn signal (E3e1)
Left auxiliary turn signal (E22 / 1)
Inner connecting sleeve, circuit L (Z53 / 4 )
• Trailer hitch connection (X52)

7.5
3 Not assigned
4 Power supply for the sliding / tilting roof (SHD), circuit 30:
• Motor for the sliding / tilting roof (SHD) (M12)
20
5 Not assigned
6 Seat heater 20
7 Combination switch (S4):

• Hazard flasher switch (S6 / 1s1)
• Windshield washer system switch (S4s4)
• Wiper switch (S4s5) Wiper motor (M6 / 1)
Windshield washer fluid pump (M5 / 1)
Relay k17:
Front wiper interval relay

30
8 Transfer case control unit (N78) / E-Call control unit (A35 / 8) 25
9 Instrument cluster (A1)
License plate light:
• Left rear door license plate light (Е19 / 3), right rear right door license plate light (E19 / 4),
• License plate light, left spare wheel holder (E19 / 5), light license plate, right spare wheel holder (E19 / 6)
Cockpit connector sleeve, circuit 58d (Z50 / 1):
• Left window switch (S21 / 13), right window switch (S21 / 14) (light emitting diodes)
• Left front SIH switch (S51 / 1), right front SIH switch (S51 / 2) (light emitting diodes)
• 2-position switch combination (S97 / 6) (light emitting diodes)
• ESP OFF switch (S76 / 6) (light emitting diodes)
• Outside mirror switch, folding and unfolding (S50 / 1) (light emitting diode)
• Electric headlamp leveling switch (S1 / 1) (light emitting diode)
• Wiper / washer switch rear window (S78) (light emitting diode)
• tilt and slide switch (S13 / 2) (light emitting diode)
• reversing lamp switch (S16 / 2)
• lighting (R3e1)
• center console switch unit (S21)
7.5
10 Radio (A2)
Roof bracket bush, circuit 15R (Z54 / 1)
• Lett sun visor with illuminated mirror (Е14 / 1)
• Right sun visor with illuminated mirror (E14 / 2)
• Automatic dimming rearview mirror (H7)
Front cigarette lighter  with ashtray illumination (R3)
• Heater element (R3r1) Glove box
lamp (E13 / 1) Instrument cluster
(A1):
• Airbag indicator and warning lamp (A1e15)
10
11 Hot foil mass air flow sensor (B2 / 5)
Camshaft position sensor (L5)
Fuel injection valves (Y62)
For M111:
• HFM control module (N3 / 4)
15
12 Inner junction sleeve, circuit 58L (Z53 / 6)
• Trailer hitch connector (X52)
• Left tail light (E3):• Left rear light and parking light (E3e2)Left front lamp assembly (E1):
• Left parking and parking lamp (E1e3))
• Left clearance lamp (E1e6)
7.5
13 Roof bracket bush, circuit 30 (Z54 / 2)
• Front dome lamp (with switch-off delay and front reading lamp) (E15 / 2)
• Rear interior lamp (E15 / 3)
• Rear left dome lamp (E15 / 8)
• Rear right corner dome lamp (E15 / 9)
• Left front footwell lights (E17 / 16)
• Right front footwell lights (E17 / 15)
• Trip computer control unit (TRIP) (N41) Sprayer
(A1):
Steering Angle Sensor (N49)
Datalink connector (X11 / 4)
10
14 Engine controller (diesel);

Injection control device;

Exhaust gas recirculation valve.

25
15 Inner junction sleeve, circuit 54 (Z52 / 6)
Left-hand brake lamp (E3)• Left brake light (E3e4)
Right rear light (E4):
• Right brake light (E4e4)
• Center high stop light (E21)
• Center high-mounted brake light, spare wheel holder (E35)
• Stop light switch
10
16 Diagnostic connector (X11 / 4)
Reversing light switch (S16 / 2)
Cockpit connector sleeve, circuit 15 (Z50 / 2)
• Air conditioning control unit (N19)
• Heater / AC switch (S98)
• Blower switch (S98s1)
• Thermostat ( S98p1)
• Lighting (S98el)
• Lighting (S98e2)
• Air recirculation switch (S98s2)
• Air conditioning switch (S98s3)
• Air recirculation flap actuator motor (M39) Instrument cluster
(A1)
15
17 Cargo area junction box (X58 / 4) 20
18 Trailer hitch connection (X52) 25
19 M111:
HFM Control Module (N3 / 4)
Adjustable Camshaft Timing Solenoid (Y49) Activated Carbon
Filter Shut- Off Valve (Y58)
M112 / 113:
Pinch Connector 87 M2e (Z7 / 36)
• EGR Changeover Valve (Y27)
• Pump Vacuum air valve (Y32)
• O2-Left oxygen sensor, in front of catalyst. (G3 / 3)
• O2-Right oxygen sensor, in front of the catalyst. (G3 / 4)
Purge Control Valve (Y58 / 1)
O2 – Left Oxygen Sensor, Downstream of Catalyst. (G3 / 5)
O2-right oxygen sensor, behind the catalyst. (G3 / 6)
15
20 Not assigned
21 Radio (A2);
Mobile phone;
Voice Control System (VCS).
15
22 Inner coupling sleeve, circuit 15 (Z51 / 5)
• ETC [EGS] control module (N15 / 3)
• Transmission range recognition switch (S16 / 10)
• Locking solenoid valve, standby / parking pawl (Y66 / 1)
• Transfer case control (N78)
• Traction systems control unit (N47) With ESP:
• Steering angle sensor (N49)Instrument cluster (A1)Cruise control button (S40)
Z M111:
HFM-SFI control unit (N3 / 4)
Z M112 / 113: 
Engine electronics control (N3 / 10)
Suction fan control (N65 / 2) on models 163.174 / 175
Rain sensor (B38)
15
23 Headlamp range adjustment control module (N71) 15
24 Inner connector sleeve, circuit 58R (Z52 / 4)
• Trailer hitch connector (X52)
Right front headlight assembly (E2)
• Right parking and parking light (E2e3)
Right rear light (E4)
• Right rear light and parking light (E4e2)
Right side marker light (E2e6)
7.5
25 Right front headlight (E2)
• Right turn signal (E2e5)
Right rear headlight (E4)
• Right turn signal (E4e1)
Right auxiliary turn signal (E22 / 2)
Traction system controller (N47)
Inner junction sleeve, R circuit (Z53 / 5):
• Trailer hitch connection (X52)
Cleaning tool (A1)• Right turn signal Indicator lamp (A1e2)
7.5
26 Connector terminal 15, fuse (Z3 / 29)
• M111 (T1) ignition columns
• M112 (T1) ignition collectors
• M113 (T1) ignition coils
15
27 Traction systems control unit (N47) 40
28 Not assigned
29 Not assigned
30 Not assigned
31 Center console switch group (S21)
Cockpit connector bushing, ventilation window (Z50 / 13)
• Left window switch (S21 / 13)
• Right window switch (S21 / 14)
Roof tilt and slide switch (S13 / 2)
Mirror lamps
15
32 Not assigned
33 Not assigned
34 Not assigned
35 Not assigned
36 Mirror heater 10
37 Two-color signaling system (H1) 20
38 Fuel pump with fuel level sensor (M3 / 3) only on model 163.128 15
39 Not assigned
40 Sound system 25
41 Not assigned
42 Central locking:
• Left front door central locking motor (M14 / 6)
• Right front right door central locking motor (M14 / 5)
Inner central locking connector socket, motor 1 (Z53 / 1)
• Rear door central locking motor (M14 / 7 )
• CL [ZV] engine of the left rear door (M14 / 8)
• CL [ZV] engine of the rear right door (M14 / 9)
• CL [ZV] fuel filler flap engine (M14 / 10)
20
43 Blower motor (М2) at the rear 20
44 Rear door washer fluid pump (M5 / 3) 15
44 Type 163.154 / 157
Engine fan relay, stage 1 (F1k26)
Engine fan relay, stage 1 (F1k26)
Left engine compartment connector sleeve, fan (Z56 / 2)
• Left auxiliary fan (M4m1)
• Right auxiliary fan (M4m2)
40
45 Electric Air Pump (M33) 40
46 Cockpit connector bush, rear fog light (Z50 / 10)
• Left rear fog light (E3e5), right rear fog light (E4e5)
Trailer hitch connector (X52)
7.5
47 Additional headlamp connector sleeve, right side engine compartment (Z56 / 4)
Left front headlight (E1)
• Left fog lamp (E1e4)
• Left auxiliary high beam (E1e7), right auxiliary high beam (E2e7)
Right front headlight (E2)
• Right fog light (E2e4)
15
48 Beep (H3) 20
Relays
K1 Heated mirrors relay
K2 Fan relay module (K39)
K3 Electric fuel pump relay (except engine 612.963)
K4 Left turn signal relay
K5 Circuit 58 of relay, license plate light / instrument cluster
K6 Stop lamp relay
K7 Right turn signal relay
K8 Starter relay (solenoid switch, terminal 50)
K9 Relay circuit 58R (right floor lamp)
K10 Reserve
K11 Relay 15 circuit with delay (engines 612.963 and 628.963 only)
K12 Circuit 15 of the relay
K13 Relay circuit 58L (left floor lamp)
K14 Comfort relay (windows / roof / mirrors)
K15 Central locking relay, tailgate unlock
K16 Reserve
K17 Front wiper relay, intermittent
K18 Reserve
K19 Reserve
K20 Central locking relay: Lock all doors
K21 Reserve
K22 Reserve
K23 Central Locking Relay: Unlock front passenger door, rear door
K24 Central locking relay: Unlock the driver’s door and the fuel filler flap
K25 Reserve
K26 Engine fan relay, stage 1, with air conditioning
K27 Rear door washer pump relay
K28 Secondary air injection pump relay
K29 Rear fog lamp relay

Fuses and module box, front right footwell

Mercedes-Benz M-Class W163 – fuse box diagram – right side legs
Number
Description
Amperes [A]
1 AIRBAG OFF indicator light 7.5
2 Front cigarette lighter  (with ashtray illumination) For VIN A289564, X754619:

20

From VIN A289565, X754620:

15
3 Tailgate Wiper Motor 15
4 To VIN A289564, X754619: E-Call control unit (only (USA))
From VIN A289565, X754620: front blower motor
7.5
40
5 Vacuum cleaner / air conditioning For VIN A289564, X754619:

7.5

From VIN A289565, X754620:

15
6 Internal socket 20
7 Not assigned
8 Left front seat heated cushion and right front seat heated cushion;

Not assigned.

For VIN A289564, X754619:

20

From VIN A289565, X754620
9 Not assigned
10 Left front seat adjustment switch For VIN A289564, X754619:

30

From VIN A289565, X754620:

35
11 Right front seat adjustment switch For VIN A289564, X754619:

30

From VIN A289565, X754620:

35
13 Remove existing fuel pump with fuel level sensor (petrol) 20
17 Heated rear window 25
19 HCS pump [SRA] 30
20 Right high beam From VIN A289565, X754620:

7.5
21 Left high / high beam indicator From VIN A289565, X754620:

7.5
24 Rear window motors and power to the lower control panel From VIN A289565, X754620:

25
25 Front window motors and ground control power supply From VIN A289565, X754620:

25
Relays
K1 Seat comfort control relay
K2 Fuel pump relay (gasoline)
K4 Rear window defroster relay
K5 HCS pump relay [SRA]
K6 Auxiliary high beam relay (from VIN A289565, X754620)
K8 Lower control panel / switch contact bridge (from VIN A289565, X754620)
K9 Relay for voltage supply term. 15
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