Page 6 of 18
Configuration
Fuses
The F87 fuse (30 A) for th
eDC/D Cconverter
is under the SRB fuse and relay module in the
main fuse box. Have this fuse changed at a
qualified specialist workshop only.
SRB fuse and relay module No. Consumer Fuse
rating 1 Horn 15 A
2 ESTL (electric steering
lock) ignition lock 25 A
3 Terminal 30 Z, vehicles
with a gasoline engine/
ignition lock/instrument
cluster 10 A
4 Light switch/switch unit
on center console 5 A
5 Windshield wipers 30 A
6 Terminal 87/5 10 A
7 MRM (jacket tube
module) 5 A No. Consumer Fuse
rating 8 Terminal 87 (2) 20 A
9 Terminal 87 (1) 25 A
10 Terminal 87 (4) 10 A
11 Terminal 15 R vehicle 15 A
12 Air bag control unit 10 A
13 Cigarette lighter/glove
box lamp/radio/body
manufacturer loading
tailgate/personal
navigation device (PND)
power socket 15 A
14 Diagnostics
connection/light
switch/instrument
cluster/deactivating
reverse warning device/
anti-theft protection with
vehicle tracking 5 A4
Fuses supplement
Page 7 of 18

No. Consumer Fuse
rating 15 Headlamp range
control/front-
compartment heating 5 A
16 Terminal 87 (3) 10 A
17 Air bag control unit 10 A
18 Terminal 15 vehicle/
brake light switch 7.5 A
19 Interio
rlighting 7.5 A
20 Co-driver's door power
window switch/terminal
30/2 SAM (signal
acquisition and
actuation module) 25 A
21 Engine control unit 5 A
22 Brake system (ABS) 5 A
23 Terminal 87 (6), starter 10 A
24 Diesel engine, engine
components/control
unit, vehicles with a
natural gas engine NGT
1 10 A
25 12 V socket in the center
console 25 A
Fuse block F55/1
No. Consumer Fuse
rating 1 Driver's door control unit 25 A
2 Diagnostics connection 10 A
3 Brake system (valves) 25 A
4 Brake system (delivery
pump) 40 A
5 Terminal 87 (2a), engine 10 A
6 Terminal 87 (1a), engine 10 A No. Consumer Fuse
rating 7 Headlamp cleaning
system 30 A
8 Anti-theft alarm system
(ATA)/beacon/beacon
with siren 15 A
9 Additional tur
nsignal
module 10 A
Fuse block F55/2
No. Consumer Fuse
rating 10 Radio
Radio NTG 2.5 15 A
20 A
11 Mobile phone/
tachograph/additional
recorder 7.5 A
12 Blower, front/auxiliary
heating blower setting 1 30 A
13 Auxiliary heating system
digital timer, radio
receiver/DIN slot basic
wiring/FleetBoard/anti-
theft protection with
vehicle tracking 7.5 A
14 Seat heating 30 A
15 Brake system control
unit 5 A
16 Heating, rear
compartment heating/
air conditioning, front/
CD changer 10 A
17 Motion detector 7.5 A
1
Natural Gas Technology. Fuses supplement
5 Z
Page 8 of 18
No. Consumer Fuse
rating Passenger-
compartment
illumination (reading
lamps or LED light strip) 7.5 A
Convenience lighting 10 A
Reading and load-
compartment lights
(courie
rvehicles) 10 A
18 Rear-compartment air-
conditioning system 7.5 A
Pre-fuse box in the battery compartment in the
footwell on the left-hand side of the vehicle F59
No. Consumer Fuse
rating 1 Preglow relay
Secondary air pump 80 A
40 A
2 Air-conditioning system
cooling fan, cab 60 A
Cab 40 A
3 SAM (signal acquisition
and actuation module)/
SRB (fuse and relay
module) 80 A
4 Auxiliary battery/
retarder
Rear-compartment air-
conditioning system 150 A
80 A No. Consumer Fuse
rating 5 Terminal 30 pre-fuse
boxes, SAM (signal
acquisition and
actuation module)/SRB
(fuse and relay module) 150 A
6 Connection point on the
base of the seat Bridge
7 Passenger compartment
air-conditioning system 80 A
PTC heater booster 150 A6
Fuses supplement
Page 10 of 18
Configuration
Fuses
Fuse block F55/3
No. Consumer Fuse
rating 1 Mirror setting/rear
window defroster 5 A
2 Rear window wiper 30 A
3 Auxiliary heating, digital
timer/rear view
camera/neutral gate
switch, starting-off aid
and all-wheel drive/
engine run-on/DIN slot
basic wiring (roof)/
FleetBoard/anti-theft
protection with vehicle
tracking/emergency
hammer lighting in
passenger compartment 5 A
4 Tachograph/ADR
working speed
governor/power take-
off/AAG (trailer control
unit) 7.5 A No. Consumer Fuse
rating 5 ECO Start/control unit
EGS (electronic gearbox
control) 5 A
10 A 6 All-wheel drive control
unit 5 A
7 ESM (electronic selector
module) 10 A
8 Loading tailgate/tipper
vehicle 10 A
9 Passenger-
compartment air
conditioning,
compresso
rclutch 7.5 A8
Fuses supplement
Page 11 of 18

Fuse block F55/4
No. Consumer Fuse
rating 10 Terminal 30, body/
equipment
manufacturer 25 A
11 Terminal 15, body/
equipment
manufacturer 15 A
12 D+, body/equipment
manufacturer 10 A
13 Fuel pump (FSCM)
Fuel pump relay 20 A
15 A
14 Trailer power socket 20 A
15 Trailer recognitio
nunit 25 A
16 Tire pressure monitor/
PARKTRONIC 7.5 A
17 PSM control unit 25 A
18 PSM control unit 25 A
Fuse block F55/5
No. Consumer Fuse
rating 19 Overhead control panel
withou
tATA and without
rain sensor 5 A
Overhead control panel
with ATA 25 A
Overhead control panel
with rain sensor 25 A
20 License plate lamp
(courier vehicles)/
perimeter lamp/
entrance lighting (bus) 7.5 A No. Consumer Fuse
rating 21 Terminal 30, body
electrics (courier
vehicles) 15 A
Rear window defroster
without ATA 30 A
Rear window defroster
with ATA 15 A
22 Electrical step, co-
driver's door (bus) 10 A
Rear window defroster 2 15 A
Vehicle socket (courier
vehicles) 20 A
23 Electric system: non-MB
body
12 V left rear socket,
load/ passenger
compartment 10 A
15 A
24 12 V socket under the
base of driver's seat 15 A
25 12 V socket rear right,
cargo compartment/
passenger compartment 15 A
26 Hot-water auxiliary
heating 25 A
27 Auxiliary warm-air heater
Heater booster system 20 A
25 AFuses supplement
9 Z
Page 15 of 18

No. Relays Description
R14 K13/7 Windshield heating relay 1
R15 K88 Body manufacturer relay, terminal 15
R16 K88/1 Body manufacturer relay, terminal 61 (D+)
R17 K95
K93
K122 Loading tailgate relay
Comfort illumination relay
LED light strip relay, passenge
rcompartment
lighting R18 K2 Headlamp cleaning system relay
R19 K51/10
K118 Beacon with siren relay
Entrance lighting relay (bus)
R20 K39/3 ATA (anti-theft alarm system) relay, horn
R21 K108
K116
K23/2 Perimeter lamp relay
License plate lamp relay (courier vehicles)
Blower relay, hot-air auxiliary heating, blower setting
1 R22 K23/3 Blower relay, hot-air auxiliary heating, blower setting
2
R23 K39/1
K124/1 Siren relay
Terminal 61 (D+) relay, anti-theft protection with
vehicle tracking
R24 K117/1 Electrical step relay 1, sliding door, right/co-driver's
door (bus)
R25 K117/2 Electrical step relay 2, sliding door, right/co-driver's
door (bus)
R26 K121
K124 Reverse warning device off relay
Anti-theft protection with vehicle tracking relay
Other relays
No. Relays Description
— K57 Battery cutoff relay
— K57/4 Auxiliary battery relay, right-hand-drive vehicle
— K9 Air-conditioning system relay, auxiliary fan (duo) Fuses supplement
13 Z