Mercedes-Benz SLK/SLC-Class (R172; 2012-2019) fuses and relays

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In this article, we consider the third-generation Mercedes-Benz SLK/SLC-Class (R172), produced from 2011 to 2019. Here you will find fuse box diagrams of Mercedes-Benz SLK200, SLK250, SLK350, SLK55, SLC180, SLC200, SLC250, SLC300, SLC43 2012, 2013, 2014, 2015, 2016, 2017, 2018 and 2019, get information about the location of the fuse panels inside the car, and learn about the assignment of each fuse (fuse layout) and relay.

Fuse Layout Mercedes-Benz SLK / SLC-Class 2012-2019


Cigar lighter (power outlet) fuse in the Mercedes-Benz SLK/SLC-Class is the fuse #9 (Front interior socket, Cigarette lighter) in the Engine Compartment Fuse Box.


Engine Compartment Fuse Box

Fuse box location

The fuse box is located in the engine compartment, under the cover.The location of the fuses in the engine compartment: Mercedes-Benz SLK/SLC-Class (2012-2018)

Fuse box diagram

Under-hood fuse box diagram: Mercedes-Benz SLK/SLC-Class (2012-2018)

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Assignment of the fuses and relay in the engine compartment
Fused functionAmp
1Electronic Stability Program control unit25
2Vario roof control control unit30
3Vario roof control control unit30
4Headlamp control unit (up to model year 2017)
Valid for diesel engine: Fuel filter condensation sensor with heating element (up to model year 2017)
20
5Rear SAM control unit with fuse and relay module
Electrohydraulic power steering via engine compartment/FFS electrical connector (as of model year 2017)
Exterior lights switch (as of model year 2017)
7.5
6Valid for diesel engine: CDI control unit
Valid for gasoline engine: ME-SFI control unit
10
7Starter via starter circuit 50 relay20
8Supplemental Restraint System control unit7.5
9Vehicle interior socket, front
Cigarette lighter with ashtray illumination
15
10Wiper motor Wiper park position heater (up to model year 2017)30
11Audio/COMAND display
Audio/COMAND control panel
7.5
12ACC control and operating unit Overhead control panel control unit Steering column tube module control unit (as of model year 2017)7.5
13Steering column tube module control unit
Multifunction camera
7.5
14Electronic Stability Program control unit7.5
15Supplemental Restraint System control unit7.5
16Radio fan electrical connector (as of model year 2017)
Valid with transmission 725: DIRECT SELECT INTERFACE (as of model year 2017)
Navigation module electrical connector (up to model year 2017)
5
16Valid for transmission 722: Electronic selector lever module control unit
Valid with transmission 725: DIRECT SELECT INTERFACE
7.5
17Left front lamp unit and right front lamp unit30
17Valid up to 31.05.2012: Overhead control panel control unit7.5
18Upper control panel control unit
Overhead control panel control unit
Backup relay (up to model year 2017)
7.5
19Valid with transmission 725: Electronic ignition lock control unit
Valid for manual transmission:
Electronic ignition lock control unit
Electric steering lock control unit
20
20Electronic Stability Program control unit40
21Glove compartment lamp7.5
22Fan motor for internal combustion engine and air conditioning with integrated control (as of model year 2017)
Valid for engine 152, 271, 274, 276, 651: Electrical connector for interior harness and engine wiring harness
Valid for engine 276, 651: Engine compartment/vehicle interior electrical connector
Valid for engine 152, 271, 276, 651: Circuit 87 M2e connector sleeve
Valid for engine 274: Connector sleeve, circuit 87/2
Valid for diesel engine:
CDI control unit
Engine compartment/FFS [RBA] electrical connector (up to model year 2017)
15
23Valid for engine 152, 271, 274, 276: Electrical connector for interior harness and engine wiring harness
Valid for diesel engine:
Quantity control valve
Circuit 87 M1e connector sleeve (as of model year 2017)
Valid for engine 276: Engine compartment/vehicle interior electrical connector (up to model year 2017)
20
24Valid for engine 152, 271, 274, 276: Electrical connector for interior harness and engine wiring harness
Valid for engine 274: Coolant circulation pump relay
Valid for diesel engine:
Engine compartment/vehicle interior electrical connector
CDI control unit (up to model year 2017)
China vehicles: Radiator shutters actuator (as of model year 2017)
15
25Valid for engine 276: Circuit 87 M4e connector sleeve
Valid for engine 274: Circuit 87 M1 connector sleeve
Valid for engine 152: Circuit 87 connector sleeve
Valid for diesel engine: Oxygen sensor upstream of catalytic converter
Valid for engine 651: (as of 01.06.2015)
NOx sensor control unit downstream of diesel particulate filter
NOx sensor control unit downstream of SCR catalytic converter
15
26Left front lamp unit and right front lamp unit (as of model year 2017)
Radio (up to model year 2017)
COMAND controller unit (up to model year 2017)
20
27Electronic ignition lock control unit
Valid for diesel engine: CDI control unit
Valid for gasoline engine: ME-SFI control unit
7.5
28Instrument cluster
Analog clock
7.5
29Right headlamp range adjustment actuator motor (as of model year 2017)
Right front lamp unit (up to model year 2017)
10
30Left headlamp range adjustment actuator motor (as of model year 2017)
Left front lamp unit (up to model year 2017)
10
31ALeft fanfare horn
Right fanfare horn
15
31BLeft fanfare horn
Right fanfare horn
15
32Valid for engine 274: Electric air pump (as of model year 2017)
Valid for engine 651: AdBlue® control unit
40
33Valid for transmission 722: Fully integrated transmission control unit10
34Fuel system control unit
Valid for engine 651: AdBlue control unit
7.5
35Electronic Stability Program control unit
Right outer rear bumper integrated radar sensor and left outer rear bumper integrated radar sensor (as of model year 2017)
5
36COLLISION PREVENTION ASSIST controller unit (as of model year 2017)
DISTRONIC electric controller unit
Left front bumper DISTRONIC (DTR) sensor (up to model year 2017)
Right front bumper DISTRONIC (DTR) sensor (up to model year 2017)
7.5
Relay
JCircuit 15 relay
KCircuit 15R relay
LReserve relay
MStarter circuit 50 relay
NEngine circuit 87 relay
OHorn relay
PValid for engine 271, 274 or 651.9 as of 01.06.2015: Adblue/secondary air injection relay
QValid up to 29.02.2016: Backup relay
RChassis circuit 87 relay

Engine Pre-Fuse Box

Engine Pre-Fuse Box: Mercedes-Benz SLK/SLC-Class (2012-2018)

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With ECO start/stop

Without ECO start/stop

Engine Pre-Fuse Box
Fused functionAmp
150Spare-
151Fan motor for internal combustion engine and air conditioning with integrated control100
152Front SAM control unit with fuse and relay module150
153ECO start/stop: Front SAM control unit with fuse and relay module
except ECO start/stop: Spare
100
153ECO start/stop (as of model year 2017): Front SAM control unit with fuse and relay module60
154except ECO start/stop: Front SAM control unit with fuse and relay module
ECO start/stop: Spare
100
155Spare-
156Spare-
157Valid as of 01.06.2015 Electrohydraulic power steering 100
157As of model year 2017:  Electrohydraulic power steering120
158Blower regulator and blower motor 50
158As of model year 2017:  Blower regulator and blower motor 40
159Vario roof control control unit 40
160Valid with transmission 725:  Fully integrated transmission control controller unit 60
161Front SAM control unit with fuse and relay module 100
162Spare-
163Rear SAM control unit with fuse and relay module 150
163As of model year 2017: Rear SAM control unit with fuse and relay module200
164ECO start/stop: Supply via ECO start/stop function additional battery
except ECO start/stop: Supply from on-board electrical system battery
100
164As of model year 2017:  Supply via ECO start/stop function additional battery200

Luggage Compartment Fuse Box

Fuse box location

The fuse box is located in the luggage compartment behind the partition covering.The location of the fuses in the trunk: Mercedes-Benz SLK/SLC-Class (2012-2018)

Fuse box diagram

Trunk fuse box diagram: Mercedes-Benz SLK/SLC-Class (2012-2018)

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Assignment of the fuses and relay in the trunk
Fused functionAmp
37Driver seat NECK-PRO head restraint solenoid
Front passenger seat NECK-PRO head restraint solenoid
7.5
38Spare-
39Left door control unit30
40Adaptive damping system control unit15
41Right door control unit30
42Fuel system control unit25
43Spare-
44Spare-
45Spare-
46FM, AM and CL [ZV] antenna amplifier
FM 2, DAB and TV antenna amplifier (up to model year 2017)
Alarm siren
Interior protection sensor
7.5
47Spare-
48Spare-
49Rear window heater30
50Right reversible emergency tensioning retractor50
51Left reversible emergency tensioning retractor50
52Spare-
53Spare-
54Spare-
55Spare-
56Spare-
57Spare-
58Spare-
59Electric parking brake control unit5
60Spare-
61AIRSCARF control unit25
62Driver seat control unit30
63AIRSCARF control unit25
64Front passenger seat control unit30
65Valid for transmission 722, 725 (ECO start/stop) (up to model year 2017)
Electric oil pump
10
66Spare-
67Sound system amplifier control unit40
68Engine sound control unit (as of model year 2017)15
69Radio (as of model year 2017)
COMAND controller unit (as of model year 2017)
20
70Tire pressure monitor control unit5
71Valid for engine 274: Left exhaust flap actuator motor (as of model year 2017)7.5
72Center console stowage compartment socket (up to model year 2017)15
73Valid for engine 274, 276: Charge air cooler circulation pump relay (as of model year 2017)10
74KEYLESS-GO control unit7.5
75Vario roof control control unit20
76MAGIC SKY CONTROL control unit7.5
77Cellular telephone system antenna amplifier / compensator5
78Media interface control unit (up to model year 2017)7.5
79Multimedia connection unit (as of model year 2017)
Radar sensors control unit (up to model year 2017)
5
80Parking system control unit7.5
81Mobile phone contact plate5
82Reversing camera (as of model year 2017)5
83Dedicated Short-Range Communications control unit (as of model year 2017)
VICS and Electronic Toll Collection power supply electrical connector (up to model year 2017)
7.5
84Digital Audio Broadcasting control unit (up to model year 2017)
Satellite digital audio radio (SDAR) control unit (up to model year 2017)
5
85Tuner unit (as of model year 2017)
Digital TV tuner (up to model year 2017)
7.5
86Camera cover control unit (as of model year 2017)5
87HERMES control unit (as of model year 2017)
eCall Russia control unit (GLONASS) (as of model year 2017)
Emergency call system control unit (up to model year 2017)
7.5
88Internal supply of rear SAM control unit with fuse and relay module80
89Electric parking brake control unit30
90Electric parking brake control unit30
91Spare-
92Spare-
Relay
ATerminal 15 relay
BCircuit 15R relay (1)
CHeated rear window relay
DFuel pump relay
RSpare
FSeat adjustment relay
GCircuit 15R relay (2)
ECO start/stop function additional battery relay