Fuses and relays Mercedes-Benz S-Class (W221 / С216; 2005 - 2009)

In autumn 2005, the fifth generation of the Mercedes-Benz S-Class, codenamed W221, was presented at the Frankfurt International Engine Show. The new S-Class is slightly wider, longer and taller than its predecessor, the W220, and also received three new powerful engines (up to 26% more power). In this material, we will analyze in detail the fuse circuits of the fifth generation Mercedes S-class (W221 / C216: S350, S450, S500, S65 AMG, S63) 2005, 2006, 2007, 2008, 2009 model year.

General view of the car
Here you will find the locations and photos of the fuse blocks. Separately, we note the elements responsible for the cigarette lighter and fuel pump.

In the luggage compartment

The location of the fuse box in the luggage compartment of the car
Access is from the cabin. The armrest needs to be folded back. Then remove the trim, and the plastic cover.


Photo - an example of the block execution.

Diagram
No. Relay assignment
M Terminal 15
N Terminal 15R
O Socket Relay
P Heated rear window
Q Charge air cooler circulation pump relay
R Cigarette lighter relay 221 / C216
S Relay for fuel pump Mercedes W221 / C216
No. Purpose of fuses A
115 Heated rear window 50
116 Engine: 275: Charge air cooler circulation pump 10
117 Rear cigarette lighter  15
118 Engine: 272, 273, 642: Non-pump fuse 30
119 Central control panel in the front of the passenger compartment 7.5
120 Not -
121 Audio tuner control unit 10
122 COMAND 7.5
123 Front Right Reversible Seat Belt Pretensioner 40
124 Front Left Reversible Seat Belt Pretensioner 40
125 Not -
126 Overhead control panel 25
127 Multi-circuit seat pneumatic pump 30
Pneumatic pump for dynamic seat adjustment
128 Engine: 275: Fuel pump control module 25
129 Overhead control panel 25
130 C216: Electric parking brake control module 30
131 Antenna amplifier module above rear window 7.5
133 Trailer recognition control module 15
134 Trunk socket 15
135 Radar Sensor Control Module (SGR) 7.5
Front short-range radar sensor module
Rear short-range radar sensor module
136 Not used -
137 -
138 -
139 Refrigerated box in the rear seat back 15
140 12V female connector 15
141 Reversing camera control module 5
142 PTS control module (Parktronic)  7.5
Distronic Plus:  Radar sensor control unit (SGR)
143 Rear seat control module 25
144 25
145 Trailer recognition control module 20
146 25
147 HDS control module (tailgate remote closing) 30
148 UHl Control Module (Universal Mobile Phone Interface) 7.5
149 Voice Control System (SBS) Control Module 5
150 TV Combo Tuner (Analog / Digital) 7.5
151 Electric parking brake control module 25
152 Antenna amplifier module above rear window 7.5

In the passenger compartment

Location of the first fuse box in the passenger compartment
The main fuse box is located on the driver's side at the left end of the instrument panel.

Assigment of fuses in the passenger compartment on the driver's side
No. A Appointment
92 40 Front Left Seat Control Module
93 7.5 Passive safety system control module
Passenger Weight System (WSS) Control Module (USA)
94 - Not
95 - Not
96 5 RDK control module (tire pressure monitoring system (Siemens))
97 7.5 W221: AV Controller Control Unit (Rear Multimedia Entertainment System)
98 - Not
99 - Not
100 - Not
101 10 Display left in the rear of the cabin
Display right in the rear of the passenger compartment
102 40 Front Right Seat Control Module
103 7.5 ESP control module
104 40 Audio Tuner Control Module
105 - Not
106 10 Electronic toll collection (ETC) control unit (Japan)
107 5 C216: SDAR block
108 5 Rear air conditioner control module
109 15 W221: Interconnection plug for electric rear passenger compartment blower
110 7.5 W221 Rear left and right seat backrest control module
111 5 HBF control module
112 5 W221 Front left and right door control module
113 - Not

Location of the second fuse box in the passenger compartment
The additional fuse box is located on the passenger side at the right end of the instrument panel.


Photo is an example of a block from the driver's side.

Diagram
No. A Description
70 40 C216:  Door block, left
W221:  Front door block right
71 15 Keyless-Go block
72 - Not used
73 5 Control module COMAND (Japan)
74 30 HDS control unit (tailgate remote closing)
75-78 - Not
79 7.5 Alarm siren with additional battery
80 40 C216:  Left door module 
W221:  Front left door block
81 30 Fund control module
40 Rear block a lion. doors
82 30 Fund control module
40 Rear block a lion. doors
83 30 Automatic transmission servo module for DIRECT SELECT (A80)
84-89 - Not
90 20 C216:  Heater STH (auxiliary heater)
W221:  Heater STH or ZUH (auxiliary heater)
91 5 Radio remote control receiving unit for autonomous heater STH

In the engine compartment

Location of the fuse box in the engine compartment of the car
The main motor fuse box is at the top right. 


Photo - general view.

Diagram
No. Relay assignment
A Air pump
B Air suspension compressor
C Terminal 87 relay, Engine
D Terminal 15 relay
E Relay el. circuit terminal 87 chassis
F Horn
G Terminal 15R
H Relay el. terminal 50 circuits, starter
J Relay el. terminal 15 circuits, starter
K Preheating the wiper blades
No. A Purpose of fuses
20 10 Engine: 642: CDI system control unit
Engine: 272, 273, 275: ME control unit
21 20 Engine: 272, 273, 275: Electr. circuit terminal 87 M1i
22 15 Engine: 272, 273: Cable lug electr. terminal 87 circuit
23 20 Cable lug electr. terminal 87 circuit
Engine: 275 (C216): Cable lug electr. circuit terminal 87 M1i
Engine: 273 (C216): Cable lug electr. circuit terminal 87 M2e
Engine: 272, 273 (W221): Ferrule electr. circuit terminal 87M2i
Engine: 642: Cable lug electr. terminal 87 circuit
24 25 Engine: 272, 273: Cable lug electr. circuit terminal 87M1e
Engine: 642: CDI system control unit
25 7.5 Instrument cluster
26 10 Front left headlight block
27 10 Front right headlamp block
28 7.5 Engine: 275: EGS control unit
Except for engine 275 (W221): Automatic transmission control unit (VGS)
29 5 Rear SAM control unit with fuse and relay module
30 7.5 Engine: 642: CDI system control unit
Engine: 272, 273: ME control unit
Engine: 275:
   ME block 
   Fuel pump fuse
31 - Not
32 - Not
33 - Not
34 - Not
35 5 Electric parking brake control module
36 10 Diagnostic connector
37 7.5 EZS block
38 7.5 Central interface control unit
39 7.5 Instrument cluster
40 7.5 Upper control panel
41 30 Slave wiper Engine
42 30 Wiper drive Engine
43 15 Front cigarette lighter fuse Mercedes w221 / c216
44 - Not used
45 - Not used
46 15 ABC system module (active body level control system)
AIRmatic system module with ADS system (W221, without ABC (Active Body Level Control))
47 15 SAM module with fuse and relay module, front
48 15
49 10 Steering column electronics
50 15 KLA module
51 7.5 COMAND display
52a - Not
52b 15 Horn left
Sound signal right
53 30 AKP servo module for DIRECT SELECT
54 40 Air recirculation unit for air conditioning of the passenger compartment
55 60 Engine: 272, 273: Electric air pump
56 40 Compressor module AIRmatic (W221, without ABC (active body level control))
57 40 Heating the zone of the initial position of the brushes cleans the glass.
60 - Not used
61 7.5
10
C216:  Restraint systems module
10 W221:  Module of passive safety systems
62 5 Night vision system module
63 - Not used
64 7.5 W221 from 1.9.06:
   Magnetic coil headrest NECK-PRO driver's seat
   Front passenger seat NECK-PRO headrest magnet coil
65 - Not
66 7.5 DTR module (Distronic, Distronic Plus)


The power unit is located near the battery.

Power block elements
No. A Decryption
F32f1 400 Starter
F32f2 150 Except Engine 642: Generator
200 Engine 642: Generator
F32f3 150 -
F32f4 150 Electric suction fan for engine and air conditioning with integrated regulator
F32f5 200 Engine 642: PTC Auxiliary Heater
F32f6 200 SAM with fuse and relay module, front
F32f7 40 ESP
F32f8 25
F32f9 20 SAM with fuse and relay module, front
F32f10 7.5 Onboard supply control unit
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