Page 8 of 22

No. Consumer Fuse
rating 8 Anti-theft alarm system
(ATA)/beacon/beacon
with siren 15 A
9 Additional turn signal
module 10 A
Fuse block F55/2
No. Consumer Fuse
rating 10 Radio 1 DIN
Radio 2 DIN 15 A
20 A
11 Mobile phone/tacho-
graph/additional
recorder
4
/navigation
cradle 6 7.5 A
12 Front blower/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 compart-
ment heating/ front-
compartment air condi-
tioning 10 A
17 Convenience lighting 10 A
Motion detector 7.5 A No. Consumer Fuse
rating Reading and cargo com-
partment lamp (courier
vehicles) 10 A
Cargo compartment
lighting 7.5 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 80 A
Secondary air pump for
vehicles with a gasoline
engine 40 A
2 Air-conditioning system
cooling fan – cab without
partition and without
rear-compartment air-
conditioning system 60 A
Air-conditioning system
cooling fan – cab with
partition and reinforced
without rear-compart-
ment air-conditioning
system 40 A
4
Latin America only.
6 Vehicles with code XM0. 6
Fuses and relays
Page 14 of 22

Fuse block F55/4
No. Consumer Fuse
rating 10 Terminal 30, body/
equipment manufac-
turer 25 A
11 Terminal 15, body/
equipment manufac-
turer 15 A
12 D+, body/equipment
manufacturer 10 A
13 Fuel pump FSCM (Fuel
Sensing Control Module) 20 A
Fuel pump relay
1, 3 15 A
14 Trailer power socket 20 A
15 Trailer recognition unit 25 A
16 Tire pressure monitor
PARKTRONIC
7 7.5 A
17 Programmable special
module (PSM) 25 A
18 Programmable special
module (PSM) 25 A
Fuse block F55/5
No. Consumer Fuse
rating 19 Overhead control panel
without ATA (Anti-Theft
Alarm system) and with-
out rain sensor 5 A
Overhead control panel
with ATA (Anti-Theft
Alarm system) 25 A No. Consumer Fuse
rating Overhead control panel
with rain sensor 25 A
20 License plate lamp (cou-
rier vehicles)/perimeter
lamp
3
/identification
lighting 3 7.5 A
21 Terminal 30, body elec-
trics (courier vehicles) 15 A
Rear window defroster
without ATA (Anti-Theft
Alarm system) 30 A
Rear window defroster
with ATA (Anti-Theft
Alarm system) 15 A
22 Rear window defroster 2 15 A
Vehicle socket (courier
vehicles) 20 A
23 12 V left rear socket,
load/rear compartment 15 A
Electric system: non-MB
body 10 A
24 12 V socket under the
base of driver's seat 15 A
25 12 V right rear socket,
load/rear compartment 15 A
26 Hot-water auxiliary heat-
ing 25 A
27 Electrical heater booster
(PTC) 25 A
Auxiliary warm-air heater 20 A
1
Vehicles with code MI6/MH3/XM0.
3 NAFTA
7 Pre-facelift vehicle. 12
Fuses and relays
Page 17 of 22
Relays in the seat base of the left front seat
No. Relays Description
R1 K6
Starter relay, right-hand drive
6R2 K41 Load relief relay, terminal 15
R3 K41/5 Starter relay, terminal 15
R4 K64
K110 Secondary air injection/secondary air pump relay
SCR relay
8
, vehicles with exhaust gas aftertreatment R5 K27 Fuel pump relay
R6 K23/1 Blower relay, front, blower setting 1
R7 K41/2 Load relief relay, terminal 15 R
R8 K6/1 Starter relay, additional battery
K6
Starter relay, left-hand drive
6R9 K13/5 Rear window defroster relay 1
R10 K13/6 Rear window defroster relay 2 with ATA (Anti-Theft
Alarm system)
K51/15 Snow plow relay, low-beam headlamps, left
R11 K117/3 Electrical step relay 1, left
K51/16 Snow plow relay, low-beam headlamps, right
R12 K117/4 Electrical step relay 2, left
6
Vehicles with code XM0.
8 Selective Catalytic Reduction. Fuses and relays
15 Z
Page 18 of 22

No. Relays Description
K51/17 Snow plow relay, high-beam headlamps, left
R13 K41/3 Load relief relay, terminal 15 (2)
K51/18 Snow plow relay, high-beam headlamps, right
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 Loading tailgate basic wiring relay
Comfort illumination relay
R18 K2 Headlamp cleaning system relay
R19 K51/10 Beacon with siren relay
R20 K39/3 ATA (anti-theft alarm system) relay, horn
R21 K108
K116
K23/2
Perimeter/identification lighting relay
3
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 Siren relay
K124/1 Terminal 61 (D+) relay, anti-theft protection with
vehicle tracking R24 K117/1 Electrical step relay 1, right
R25 K117/2 Electrical step relay 2, right
R26 K121 Reverse warning device off relay
K124 Anti-theft protection with vehicle tracking relay
Other relays
No. Relays Description
— K57 Battery cutoff relay, left-hand-drive vehicle
— K57/4 Battery cutoff relay, right-hand-drive vehicle
— K9 Air-conditioning system relay, auxiliary fan (duo)
3
NAFTA 16
Fuses and relays