Mercedes w221: fuses and relays
Content
Mercedes w221 is the fifth generation of Mercedes-Benz S-class cars, produced in 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 and 2013 with various versions of S350, S450, S500, S600, S65 AMG, C63. During this time, the model has been redesigned. Our information will also be useful to owners of the Mercedes-Benz C216 (CL-class), as these cars are produced on a common basis. We will present a detailed description of the Mercedes 221 fuses and relays with block diagrams and their locations. Select the fuses responsible for the cigarette lighter.
The location of the blocks and the purpose of the elements on them may differ from those shown and depend on the year of manufacture and the level of equipment of your car.
Blocks under the hood
Location
The location of the blocks under the hood of the Mercedes 221
Description
- F32 / 3 - power fuse box
- N10/1 - Main fuse and relay box
- K109 (K109 / 1) - Vacuum pump relay
Fuse and relay box
It is located on the left side, next to the stand, and is covered with a protective cover.
Photo - example
scheme
designation
| twenty | 10A CDI system control unit |
| ME control unit | |
| 21 | 20A Electrical cable terminal circuit terminal 87 M1i |
| CDI system control unit | |
| Fuel pump relay | |
| The metering valve | |
| 22 | 15A Electrical cable terminals 87 |
| 23 | 20A Electrical cable terminal circuits 87 |
| Cable terminal Electrical circuit terminal 87 M2e | |
| Cable terminal Electrical circuit terminal 87 M2i | |
| SAM control unit with rear fuse and relay module | |
| 24 | Electrical wire circuit terminals 25A 87M1e |
| CDI system control unit | |
| 25 | 7.5A Instrument cluster |
| 26 | 10A Left headlight |
| 27 | 10A Right headlight |
| 28 | A 7,5 |
| EGS control unit | |
| Control unit integrated in automatic transmission (VGS) | |
| 29 | SAM 5A control unit with rear fuse and relay module |
| 30 | CDI system control unit 7,5 A |
| ME control unit | |
| Fuel pump control unit | |
| 31 | 5A S 400 Hybrid: electric air conditioning compressor |
| 32 | 15A Additional gearbox oil pump control unit |
| 33 | 5A From 1.9.10: ESP control unit |
| Hybrid S400: | |
| System Battery Management Unit | |
| DC/DC converter control unit | |
| Power electronics control unit | |
| 3. 4 | 5A S 400 Hybrid: Brake energy regeneration control unit |
| 35 | 5A Electric parking brake control unit |
| 36 | Diagnostic connector 10A |
| 37 | Control unit 7,5A EZS |
| 38 | 7.5A Central interface control unit |
| 39 | 7.5A Instrument cluster |
| 40 | 7.5A Upper control box |
| 41 | 30A Wiper driven motor |
| 42 | Main wiper motor 30A |
| 43 | 15A Illuminated cigarette lighter, front |
| 44 | To book |
| Four five | 5A C 400 Hybrid: |
| Circulation pump 1 power electronics | |
| 46 | 15A ABC control unit (active body level control) |
| AIRMATIC control unit with ADS | |
| 47 | 15A Electric motor for adjusting the rise and fall of the steering column |
| 48 | 15A Steering column adjustment motor forward and backward |
| 49 | 10A electronic steering column module |
| 50 | Shield 15A OKL |
| 51 | COMMAND Screen 5A |
| SPLIT SCREEN | |
| 52-th | 15A W221: |
| Left horn | |
| right horn | |
| 52б | 15A W221, C216: |
| Left horn | |
| right horn | |
| 53 | To book |
| 54 | Air recirculation unit 40A Clima |
| 55 | 60A petrol engines: electric air pump |
| 56 | Compressor unit AIRmatic 40A |
| 57 | 30A heated wipers |
| 60 | 5A Electro-hydraulic power steering |
| 61 | 7.5A Hold control unit |
| 62 | 5A Night vision control unit |
| 63 | 15A Fuel filter fogging sensor with heating element |
| 64 | 10A W221: |
| NECK-PRO solenoid coil in the headrest behind the driver's seat | |
| NECK-PRO headrest solenoid coil Right front seat backrest | |
| sixty five | 15A Valid from 1.6.09: 12 V plug connection in glove box |
| 66 | Control module 7.5A DTR (Distronic) |
| Relay | |
| BUT | Air pump relay |
| Б | Air suspension compressor relay |
| С | terminal 87 relay, motor |
| Д | Relay terminal 15 |
| Me | Relay, electrical terminal circuit 87 undercarriage |
| Ф | Horn relay |
| GRAM | Relay terminal 15R |
| TIME | Relay terminal 50 circuit, starter |
| J | Relay terminal 15 circuit, starter |
| К | Wiper heating relay |
For the front cigarette lighter, fuse number 43 answers 15A. The rear cigarette lighter is controlled by fuses in the rear fuse and relay box.
Power fuse box
Located on the right side of the engine compartment, next to the battery.
Option 1
scheme
Goal
- F32f1 — starter 400A
- F32f2 - except engine 642: generator 150 A / engine 642: generator 200 A
- F32f3 - 150
- F32f4 - Electric exhaust fan for engine and air conditioning with built-in regulator 150A
- F32f5 - Engine 642: Additional heater PTC 200A
- F32f6 - SAM control unit with 200A front fuse and relay module
- F32f7 - ESP 40A control unit
- F32f8 - ESP 25A control unit
- F32f9 - SAM control unit with 20A front fuse and relay module
- F32f10 - Onboard power supply control unit 7,5A
Option 2
Photo
scheme
designation
| 3 | SAM 150A control unit with rear fuse and relay module |
| 4 | Start-Stop Relay 150A ECO |
| S 400 Hybrid: DC/DC converter control unit | |
| Windshield heating control unit | |
| 5 | 125A Multifunction control unit for special vehicles (MCC) |
| 40A S 400 Hybrid: vacuum pump | |
| 6 | 80A Right front fuse box |
| 7 | 150A Multifunction control unit for special vehicles (MCC) |
| 629, 642, 651 Engine: PTC auxiliary heater | |
| eight | 80A SAM front control box with fuse and relay module |
| nine | 80A Left front panel fuse box |
| ten | SAM 150A control unit with rear fuse and relay module |
Blocks in the salon
Location
The location of the blocks in the cabin of the Mercedes 221
transcribed
- F1 / 6 - Fuse box in the instrument panel on the right
- F1 / 7 - Fuse box in the instrument panel, left
- F32 / 4 - power fuse box
- F38 - Battery emergency fuse
- N10/2 - Rear fuse and relay box
Fuse box in the panel on the left
This fuse box is located on the far left of the dashboard on the left, behind a protective cover.
scheme
transcribed
| 92 | 40A Left front seat control unit |
| 93 | SRS control unit 7.5A |
| Passenger Weight System (WSS) Control Unit (USA) | |
| 94 | Not used |
| 95 | Not used |
| 96 | 5A RDK control unit (tire pressure monitoring system (Siemens)) |
| 97 | 7.5A W221: AV driver control unit (rear multimedia entertainment system) |
| 98 | Not used |
| 99 | Not used |
| 100 | Not used |
| 101 | 10A Left rear window |
| Right rear window | |
| 102 | 40A Right front seat control unit |
| 103 | Switchboard ESP 7,5A |
| 104 | 40A Audio tuner control unit |
| 105 | Not used |
| 106 | Electronic Toll Control (ETC) (Japan) |
| 107 | 5A C216: SDAR control unit |
| 108 | 5A Rear air conditioner control unit |
| 109 | 15A W221: Rear blower intermediate connector |
| 110 | 7,5 A W221: |
| Multi-contour backrest control unit, rear left | |
| Multi-contour backrest control unit, rear right seat | |
| 111 | Control unit 5A HBF |
| 112 | 5A W221: |
| Left front door control unit | |
| Right front door control unit | |
| 113 | Not used |
Fuse box in the panel on the right
This fuse box is located in the far right corner of the left instrument panel behind a protective cover.
scheme
Description
| 70 | 40A C216 : Right door control unit |
| W221: right front door control unit | |
| 71 | Switchboard KEYLESS-GO 15А |
| 72 | 7.5AS 400 Hybrid: pyrotechnic switch |
| 73 | Control unit 5А COMAND (Japan) |
| Emergency call system control unit | |
| 74 | 30A HDS control unit (remote closing of the tailgate) |
| 75 | 10A S 400 Hybrid: |
| System Battery Management Unit | |
| Power electronics control unit | |
| 76 | Engine 642.8: AdBlue relay |
| 15A S 400 Hybrid: Vacuum pump relay (+) | |
| 77 | Acoustic amplifier 50A |
| 78 | 25A S 65 AMG with 275 engine: Auxiliary fan relay |
| Engine 642.8: AdBlue relay | |
| 15A Engine 157, 278; S 400 Hybrid, CL 63 AMG: intercooler circulation pump | |
| 79 | 7,5A alarm siren |
| 80 | 40A C216: Left door control unit |
| W221 : left front door control unit | |
| 81 | 30A C216: Rear compartment systems control unit |
| 40A W221: Left rear door control unit | |
| 82 | 30A C216: Rear compartment systems control unit |
| 40A W221: Rear right door control unit | |
| 83 | 30A Automatic transmission servo module for DIRECT SELECT system |
| 84 | 20A digital sound processor |
| 85 | 10A AMG: Illuminated running boards |
| 86 | To book |
| 87 | To book |
| 88 | To book |
| 89 | To book |
| 90 | 20A C216: STH heater (additional heating system) |
| W221: Heater STH (independent) or ZUH (additional) | |
| 91 | 5A STH Radio remote control receiver for auxiliary heater |
| S 400 Hybrid: Front SAM control unit with fuse and relay module |
Rear fuse and relay box
This unit is installed in the trunk, behind the rear seat armrest. To access, lower the armrest and remove the protective cover.
scheme
designation
| 115 | 50A rear window heating |
| 116 | 10A Engine 157, 275, 278: Charge air cooler circulation pump |
| Engine 156 - Engine Oil Cooler Circulation Pump | |
| S 400 Hybrid: electronic circulation pump 2 | |
| 117 | 15A rear cigarette lighter |
| 118 | 30A Engine 629, 642: fuel pump |
| 15A S 400 Hybrid: circulation pump 1 power electronics | |
| 15A Engine 642.8, 651 from 1.6.11: Refrigerant compressor with magnetic clutch | |
| 119 | 7,5A Front central control panel |
| 120 | To book |
| 121 | 10A audio tuner control unit |
| 122 | 7.5A COMMAND control box |
| 123 | 40A W221: Front right reversible seat belt pretensioner |
| 124 | 40A W221: Front left reversible seat belt pretensioner |
| 125 | 5A Voice control unit (SBS) |
| 126 | 25A roof control panel |
| 127 | 30A Lower seat back pump |
| Pneumatic multi-circuit saddle pump | |
| Air pump for dynamic seat adjustment | |
| 128 | 25A Engine 156, 157, 272, 273, 275, 276, 278, 642: Fuel pump control unit |
| 129 | 25A UHI (Universal Cell Phone Interface) Control Box / Ceiling Control Box |
| 130 | 30A Electric parking brake control unit |
| 131 | Antenna amplifier module 7,5A above the rear window |
| 133 | 15A Trailer recognition control unit |
| 5A rear view camera | |
| 134 | 15A socket in the trunk |
| 135 | 7.5A Radar control unit (SGR) |
| PTS control unit (PARKTRONIK) | |
| 136 | 7.5A Engine 642.8: AdBlue control unit |
| 137 | 7.5A From 1.9.10: Rear view camera |
| 138 | Navigation Processor 5A (Taiwan, before 31.08.10/XNUMX/XNUMX) |
| Emergency call system control unit | |
| TV tuner/connector (Japan) | |
| 139 | 15A Refrigerated box in the back of the rear seat |
| 140 | 15A Cigarette lighter socket with rear ashtray light |
| 115V socket | |
| 141 | 5A Rear view camera control unit |
| Rear view camera power supply | |
| 142 | Control unit 7,5A VTS (PARKTRON) |
| Radar sensors control unit (SGR) | |
| Control unit for video sensors and radar sensors (since 1.9.10) | |
| 143 | 25A Rear seat control unit |
| 144 | 25A Rear seat control unit |
| 145 | Drawbar connector AHV 20A, 13-pin |
| 146 | 25A Trailer detection control unit |
| 147 | To book |
| 148 | 25A Terminal sleeve 30 Panoramic sunroof |
| 149 | 25A Panoramic sunroof control module |
| 150 | Combined TV tuner 7,5 A (analogue/digital) |
| TV tuner/connector (Japan) | |
| 151 | 20A Trailer sensor control module 25A Electric parking brake control module |
| 152 | 25 A DC/AC converter control unit 7,5 A Antenna amplifier module above the rear window |
| Relay | |
| METER | Terminal 15 relay (2) / reserve 1 (reversing relay) |
| TIME | Relay terminal 15R |
| OR | Relay socket |
| П | Heated rear window relay |
| Question | Engine 156, 157, 275, 278, 629: Circulation pump relay |
| S 400 Hybrid: Circulation pump relay 2, power electronics | |
| Р | cigarette lighter relay |
| Yes | Engine 642 except 642.8: Fuel pump relay |
| Engine 642.8, 651 from 1.6.11: refrigerant compressor magnetic clutch | |
| S 400 Hybrid: circulation pump relay 1 power electronics |
Fuses 117 and 134 are responsible for the cigarette lighter.
Power fuse box
In the cabin, on the right side of the passenger side, another power fuse box is attached.
Photo - example
scheme
Goal
| two | Generator 400A (G2) |
| 3 | Electro-hydraulic power steering 150A |
| Engine 629, 642: end of time for glow plugs | |
| 4 | Fuse box in salon F32/4 |
| 5 | 100A Electric exhaust fan for engine and air conditioner with built-in regulator |
| 6 | 150A SAM front control box with fuse and relay module |
| 7 | Switchboard ESP 40A |
| S 400 Hybrid: Brake energy regeneration control unit | |
| eight | Switchboard ESP 25A |
| S 400 Hybrid: Brake energy regeneration control unit | |
| nine | 25A Front SAM control box with fuse and relay module |
| ten | To book |
| Relay | |
| F32/4k2 | Relay for quiescent current interruption |
Additional fuses and relays for the Adblue system can also be installed in the trunk.
That's all, if you have something to add, write in the comments.
8 comments
Mario
Hello good afternoon and the radio and cd fuse I can not locate it thanks
Salah
Hello I would like to know where is the electronic ignition switch on mercedes s500 w221 thank you
Salah
Hello I have an s500 w221 mot v8 435hp but does not start the key turns the meter comes on but does not start do you have any idea where it could come from, a little info the car has remained 3 years without turning
Send
genre
I have such a problem, the generator sometimes charges, sometimes it doesn't charge, it seems that something is overheating, does it have a relay somewhere? I have a 2000a 320s water-cooled generator. The generator has been repaired twice, but it works. Can anyone help? if you can, you could write to an email ritsu19@mail.ee
Emad
Peace be upon you. I have a problem with the fuse box circuit inside the front cap next to the front battery. The question is: Why is the back battery charging and the front one not charging? I constantly renew the front battery.
Hamad
My problem is that the front battery does not charge when I install a new battery, which lasts a month or more depending on operation.
Emad
I have a problem with the front battery and it does not charge when I change the front battery within ten. Or a month, the operation process does not occur during it, but the rear battery is doing well in terms of charging
Emad
I have a problem with charging the front battery, and it does not receive a charge. I checked and changed the box next to the battery, to no avail. I checked the dynamo, which is excellent, and the charging process with the back battery is excellent.