Mercedes-Benz SLK R171 (2004-2010) – fuse and relay box

Diagrams of fuse boxes and relays – Mercedes-Benz SLK R171

Applies to vehicles manufactured in the years:

2004, 2005, 2006, 2007, 2008, 2009, 2010.

For the lighter on the Mercedes-Benz SLK R171 is fuse number 47 in the fuse box in the engine compartment.

Fuse box – location

Mercedes-Benz SLK (R171) – fuse box diagram – location

F32 – Front fuse
F34 – Inner fuse box
N10 / 1 – Driver side SAM control unit with fuse and relay module
N10 / 2 – Rear SAM control unit with fuse and relay module

Trunk fuse box

Mercedes-Benz SLK (R171) – fuse diagram – trunk
Number Description Amperes [A]
1 Vehicle Information and Communication System (VICS) (Japan only) (up to 2008) 5
2 Not used
3 Telephone system (up to 2008);
Tire pressure monitor control unit (from 2009);
Parktronic control unit (from 2009).
7.5
4 Fuel pump assembly 20
5 Backup relay 2 (as of 2009) 20
6 Not used
7 Backup 1 relay (as of 2009) 20
8 Left antenna amplifier module, right antenna amplifier module (up to 2008);

Left rear antenna amplifier (up to 2008);

Anti-Theft Alarm System (ATA [EDW]);

Compensator.

5
9 Parktronic System (PTS) (up to 2008) 5
Seat heater, AIRSCARF and steering wheel heater control unit (as of 2009) 25
10 Rear window defroster 40
11 Not used
12 Not used
13 Luggage compartment lighting (up to 2008);
CDA telephone (additional wiring harness) (up to 2008);
Lumbar pump (from 2009);
Emergency call system control unit (from 2009);
VICS + ETC voltage separation point (from 2009).
5
14 Not used
15 Interior central locking (up to 2008);
Release filler cap (up to 2008);
Fuel filler flap CL [ZV] engine (from 2009);
Glove compartment CL engine [ZV] (from 2009);
CL center console compartment engine (from 2009).
5
16 Lumbar pump (as of 2009) 7.5
17 Digital Audio Radio (SDAR) satellite (US only) (up to 2008);
Voice Control System (VCS) (US only) (up to 2008).
5
18 Seat heater, AIRSCARF and steering wheel heater control unit (as of 2009) 20
19 CD player with changer (in glove box) (up to 2008);
Navigation system (up to 2008).
7.5
Seat heating, AIRSCARF and steering wheel heating control unit 20
20 Emergency call system (US only) (up to 2008) 7.5
Seat heating, AIRSCARF and steering wheel heating control unit 10
Relay
A Fuel pump relay
B VICS relay (Japan only)
C. Backup relay 2
D Backup 1 relay
E. Rear window defroster relay
F. Circuit 15R, relay 1
G. 1 fuel cap polarity reversal relay
H. Fuel cap polarity reversal relay 2

Instrument panel fuse panel

Mercedes-Benz SLK (R171) – fuse diagram – instrument panel
Number Description Amperes [A]
21 Soft top control unit 5
22 Roof control unit control unit 5
23 Airscarf system for left seat (up to 2008) 25
Multimedia interface control unit (as of 2009) 5
24 Airscarf system for right seat (up to 2008) 25
Cell phone separation point (as of 2009)
25 Heated seats (up to 2008) 25
Amplifier for sound system (as of 2009) 40
26 Radio systems (up to 2008) 30
Radio (as of 2009) 25
27 Left door control module 25
28 Right door control module 25
29 AC recirculation unit 40
30 Instrument cluster 5
31 Heated steering wheel (up to 2008) 10
32 Right rear window motor (up to 2008)
Soft upper control unit (as of 2009)
25
33 LHD: Steering column module 5
34 Steering wheel adjustment (up to 2008);
Driver side front seat adjustment control unit, with memory (as of 2009).
30
35 Front passenger seat adjustment (up to 2008);
Front passenger side seat adjustment control unit with memory (as of 2009).
30
36 EIS driver [EZS];

Electric steering wheel lock control unit.

15
37 Top control panel;
Automatic air conditioning (KLA) or automatic comfort air conditioning (C-AAC);
Mirror adjustment (up to 2008);
Vario Roof Control (VD) (up to 2008);
Duovalve (until 2008);
Folding mirrors (up to 2008);
HEAT control and operating unit (as of 2009) Control and operating unit;
Comfort AAC [KLA] (as of 2009).
7.5
38 Hydraulic unit with soft top mechanism 40
39 Left rear window motor (up to 2008);
Soft upper control unit (as of 2009).
25
40 Data link connector (1.3) (up to 2008);
Central gate control unit.
5
41 Radio systems (up to 2008);
Navigation system (up to 2008);
Emergency call system control unit (from 2009);
Digital Audio Broadcasting control unit (from 2009);
SDAR control unit (from 2009).
5
42 RHD: Steering column module 5

Fuse box in the engine compartment

Mercedes-Benz SLK (R171) – fuse box diagram – engine compartment
Number Description Amperes [A]
43 Horn 15
44 Glove box lighting with a switch;
Lighting for the storage compartment between the backrests (as of 2009);
Lighting for the storage compartment in the armrest (as of 2009);
Multifunctional sensor C-AAC [K-KlA].
5
45 ARMADA airbag control unit (up to 2008);
Airbag indicator and warning lamp (up to 2008);
Safety systems control unit (from 2009);
Front passenger seat and child seat recognition sensor occupied (from 2009; USA);
Weight detection system (WSS) control unit (as of 2009; USA).
7.5
46 Wiper System (WSA) 40
47 Cigarette lighter with ashtray lighting;
Internal socket;
Radio systems (up to 2008).
15
48 Not used
49 ARMADA airbag control unit (up to 2008);
Airbag indicator and warning lamp (up to 2008);
Safety systems control unit (from 2009).
7.5
50 Turns on and controls the lighting on the exterior lights switch 5
51 Instrument cluster (up to 2008);
Headlamp Range Control (HRA) (up to 2008);
Electric suction fan for engine / air conditioning (up to 2008).
5
HRA power module (as of 2009);

Valid with engine 113.989 (SLK55 AMG):

Control box blower motor (as of 2009).

7.5
52 Starter 15
53 Engine control circuit 87 / M1 (up to 2008);

Rear SAM control unit with fuse and relay module (from 2009);
Starter relay (from 2009);

Valid for engines 271, 272:

ME-SFI [ME] control unit (from 2009);

Valid with engine 113.989 (SLK 55 AMG):

ME-SFI [ME] control unit (as of 2009);

Valid with engine 113.989 (SLK 55 AMG):

Circuit 87 M1e connector sleeve (as of 2009);

Valid for engine 272:

Circuit 87 of M1e connector (as of 2009).

25
54 Engine control system, circuit 87 / M2 (up to 2008);
AAC with integrated control of an additional fan motor (as of 2009)Valid with engine 113.989 (SLK55 AMG), 272: Air pump relay (as of 2009).
15
55 Headlamp Range Adjustment (HRA);
Reverse lamp switch (up to 2008);Valid for gearbox 722:Electric Control Unit (VGS) (up to 2008);Valid for gearbox 722:

Electronic gear lever module control unit (from 2009);

Valid for gearbox 722.6:

ETC control unit [EGS] (as of 2009).

7.5
56 Electronic Stability Program (ESP) 5
57 EIS control unit [EZS];

Valid for engine 113.989 (SLK 55 AMG), 272:

Engine management.

5
58 Not used
59 ESP [electronic stabilization program] (pump) 50
60 ESP (valve block) 40
61 Not used
62 Data link connector;
Exterior lights switch.
5
63 Exterior lights switch 5
64 Radio systems (up to 2008);
Navigation system (up to 2008).
10
65 Valid for engine 113.989 (SLK 55 AMG), 272:

Electric air pump.

40
Relay
J. FAN Relay Module (up to 2008);
Fanfare I horn relay (as of 2009).
K. Circuit 87 of the relay, chassis
L Wiper relay, step 1-2
M. Circuit relay 15R
N Backup relay
O Valid with engine 113.989 (SLK55 AMG), engine 272:

Air pump relay.

P. Circuit 15 relay
Q Wipers on and off relay
R Relay 87 circuit, engine
S Starter relay

Front rail

Mercedes-Benz SLK (R171) – fuse box diagram – front prefuse
Number Description Amperes [A]
1 Internal fuse box 125
2 Rear SAM control module with fuse and relay module 200
3 Reserve 125
4 Driver side SAM control module with fuse and relay module part 1 200
5 Electric suction fan for engine / air conditioning 125
6 Driver side SAM control module with fuse and relay module part 4 60
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