Mercedes w220 represents the fourth generation of Mercedes-Benz S-class cars which were produced in 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005 in various additions S280, S320, S350, S430, S500, S600, S55 AMG, S63 AMG, S65 AMG, S320 CDI, S400 CDI. During this time, the model has been restyled. In our article you will find a description of the fuses and relays Mercedes 220 with box diagrams, photo examples and their locations. We will note the cigarette lighter fuse.
The design of the boxes and the purpose of their elements may differ from those presented and depend on the year of manufacture, the level of equipment and the region where your car was delivered.
Contents
Engine compartment
Box on the left side
One fuse and relay box is located on the left side of the engine compartment.
Photo – example
Diagram
Assignment
Fuses
| 1 | 40A Wiper heater relay (K40/6kA) |
| 2 | 50A Supply/exhaust pump relay (K40/6kF) |
| 3 | 15A Horizontal steering column adjustment: |
| • Relay 1 for longitudinal steering column adjustment (K40/6kD) | |
| • Relay 2 for longitudinal steering column adjustment (K40/6kE) | |
| 4 | 15A Vertical steering column adjustment: |
| • Tilt steering relay 1 (K40/6kI) | |
| • Relay 2 for steering angle adjustment (K40/6kJ) | |
| 5 | 40A Relay ON/OFF Wiper (K40/6kH) |
| 6 | 7,5A Auxiliary switch heater (S4/3) / (since 09.2002 – absent) |
| 7 | — |
| 8 | — |
| 9 | 30A With air suspension: |
| • Airmatic system control unit with ADS (N51) | |
| with Active Body Level Control (ABC): | |
| • ABC system control unit (N51/2) | |
| 10 | 15A Washer pump (M5/1) |
| 11 | 5/15A Cigarette lighter with front ashtray illumination (R3) / (from 09.2002 – VISC power split point X137/1) (from 09.2002 – only on Japanese models) |
| 12 | 7.5A Dynamic locking of the seat belt band (A60) / (since 09.2002 – no longer available) |
| 13 | 40A Front left door control unit (N69/1) |
| 14 | — |
| 15 | — |
| 16 | 7.5A Brake light switch (S9/1) |
| 17 | — |
| 18 | 5A With a GSM mobile phone (D2B) (basic equipment) (code 317): |
| • mobile phone plug (X39/39) | |
| If you have an MB GSM (D2B) phone (code 316): | |
| • D2B interface for landline phone (A59) | |
| If you have an MB GSM (D2B) telephone (code 316) with an emergency call system Tele Aid (code 347): | |
| • Tele Aid system control unit (A35/8) | |
| If you have an MB GSM (D2B) telephone (code 316) with an emergency call system E-Call (code 349) via the cable connector of terminal 15R (Z3/12): | |
| • D2B interface for landline phone (A59) | |
| • range control unit (N96) | |
| • E-Call system control unit (A35/8) (from 09.2002 – With MB GSM (D2B) telephone (code 854): | |
| • via connector 15R(Z3/1) of circuit 2: – frequency selection control unit (N96) – E-Call control unit (A35/8) – D2B interface for mobile phone (A59/1) | |
| 19 | 5A from 09.2002 – front left (A76) and right (A76 / 1) reversible emergency tensioners |
| 20 | 5A Dashboard (A1) Diagnostic socket (X11/4) / (since 09.2002 – no longer available) |
| 21 | 5A Dashboard (A1) / (since 09.2002 – no longer available) |
| 22 | 5/1A Dashboard (A1) / (since 09.2002 – Radio (A2) control panel with COMAND system display (A40/3)) |
| 23 | 10A Via cable connector terminal 30 KLA (Z7/21): |
| • KLA control panel (N22) | |
| • circulation pump (A31/1m1) | |
| • left double valve (A31/1y1) | |
| • Right double valve (A31/1y2) (from 09.2002 – With TV tuner (Code 860): TV tuner (A2/10) With TV tuner (Code 860): Via connector (Z4/3) chain 30 models for Japan: – TV tuner (A2/10) – radio with CD changer (A2/16)) | |
| 24 | 10A Diagnostic socket (X11/4) / (from 09.2002 – 20A audio input control unit) |
| 25 | 25A since 09.2002 – Sound amplifier (A2/13) |
| 26 | 10A Upper control panel (N72/1) / (since 09.2002 – no longer available) |
| 27 | — |
Fuse number 11 is responsible for the cigarette lighter, one more in the box in the cabin in the instrument panel.
Relay
| A | Wiper heater relay (K40/6kA) |
| B | Relay circuit 15 (K40/KB) |
| C | Relay circuit 15 (K40/KC) |
| D | Longitudinal steering column adjustment relay 1 (K40/6kD) |
| E | Longitudinal steering column adjustment relay 2 (K40/6kE) |
| F | Pressure/exhaust pump relay (K40/6kF) |
| G | Wiper position relay 1 and 2 (K40/6kG) |
| H | Relay ON/OFF Wiper (K40/6kH) |
| I | Tilt steering relay 1 (K40/6kI) |
| J | Tilt steering relay 2 (K40/6kJ) |
| K | Relay for electronic engine and chassis control systems (K40/7kK) |
| L | Starter relay (K40/7kL) |
| M | Diesel models only: CDI relay (K40/7kM) |
| N | Air pump relay (K40/7kN) |
| O | Air compressor relay (K40/7kO) |
| P | Horn relay (K40/7kP) |
| Q | Rear window blind relay (K40/5kQ) |
| R | Towing protection relay (K40/5kR) |
| S | Relay circuit 15 (K40/5kP) |
| T | Fuel pump relay (K40/5kP) |
| U | Rear defroster relay (K40/5kU) |
| V | Relay Motronic (K40/8kV) |
| W | Air boost relay (K40/8kW) |
| X | In-tank fuel pump relay (AMG only) (K40/8kX) |
Box on the right side
The second fuse and relay box is located on the right side of the engine compartment.
Diagram
Designation
| 28 | 15A Horn relay (K40/7kP) |
| 29 | 20A Relay for electronic engine and chassis control systems (K40/7kK) |
| 30 | 20A Relay for electronic engine and chassis control systems (K40/7kK) |
| 31 | 40A Air pump relay (K40/7kN) |
| 32 | 40A Air compressor relay (K40/7kO) |
| 33 | 40A Heating air circulation unit (A32) |
| 34 | 5A Traction control control unit (N47) |
| 35 | 15A from 09.2002 – With steering wheel heater (Code 443): Steering wheel heater (R22/4) |
| 36 | 7.5A With Distronic (Code 219a): DTR system control unit (N63/1) |
| 37 | 15A Cable connector cl. 87 (Z7/5): |
| • control unit of the electronic module of the control lever АТ (N15/5) | |
| • EGS system control unit (N15/3) | |
| 38 | 5A Interior boot lid button (KIT) |
| 39 | 40A Front right door control unit (N69/2) |
| 40 | 10A If available xenon. headlights (code 612b): |
| headlight range control unit (N71) | |
| 41 | 20A With auxiliary heating system (code 228): via cable connector terminal 30 (brazed sleeve in wiring harness) (Z7/26): |
| • auxiliary heater (STH) or add. Heater (ZUH) (A6) | |
| • radio remote control receiver STH (A6/1) | |
| 42 | 20A • via cable plug cl. 87 (Z7/24) (until 09.2002): |
| #ИМЯ? | |
| 43 | 25A For diesel engines only: |
| • Via cable connector terminal 87 (Z7/47) (until 09.2002): – CDI control unit (N3/9) – starter relay (K40/kL) in the front right relay and fuse box (K40/7) | |
| 44 | 7.5A Diesel engines only: |
| • CDI control unit (N3/9) | |
| • heating of the inlet pipeline, in the front right box of relays and fuses (K40/7) | |
| 44 | 10A Via cable connector terminal 87D2 (Z7/48) (until 09.2002): |
| • CDI control unit (N3/9) | |
| • starter relay (K40/kL) in the front right relay and fuse box (K40/7) | |
| • electric fan-supercharger of the engine and air conditioner with built-in regulator (M4/7) | |
| • low temperature circuit circulation pump (M44) | |
| 45 | — |
| 46 | 5A With Active Level Control (ABC): |
| • ABC system control unit (N51/2) With air suspension: | |
| • Airmatic system control unit with ADS (N51) | |
| 47 | 10A Multifunction sensor KLA (B31/1) |
| Fan motor in electrical protection box (M2/2) | |
| Multifunction sensor KLA (B31/1) (until 09.2002) | |
| relay control fan unit of the engine cooling system or AT oil (K25) via plug connector (X22/3) (until 09.2002) | |
| Via cable electric fan circuit (Z5/1) (until 09.2002) | |
| • multifunction sensor KLA (B31/1) (until 09.2002) | |
| • relay control add. fan unit of the engine cooling system or oil in AT (K25) via plug connector (X22/3) (up to 09.2002) | |
| • fan electric motor in a protective box for electrical equipment ( M2/2) (until 09.2002) | |
| 48 | 7.5A Blower fan control unit (N65/2) / (since 09.2002 – no longer available) |
| 48 | 7.5A Electric fan-supercharger for engine and air conditioning with built-in regulator (M4/7) / (from 09.2002 – absent) |
| 49 | 15A Via cable connector on protected terminal 15 (Z3/29): |
| • ignition coils (T1/1) – (T1/8) | |
| • radio interference suppression capacitor (C4), for Japan and USA |
Additional box
Another additional box is installed under the hood on the right side.
Diagram
Allocation
- V – Motronic system relay
- W – Charge air relay
- X – Fuel module relay in the tank (fuel pump relay)
- 87 – 20A Motronic (K40/8kV), M275/M113 E55 AMG
- 88 – 20A Motronic (K40/8kV), M275/M113 E55 AMG
- 89 – Reserve
- 90 – 10A Charge air relay (K40/8kW), M275/M113 E55 AMG
- 91 – Reserve
Passenger compartment
Box in the dashboard
In the instrument panel on the right side, behind a protective cover, there is a fuse box.
Diagram
Appointment
- 7.5A Steering column control unit, Engine control unit, EIS control unit, Alarm clock
- 5A Instrument panel
- 10A Top control panel module
- 10A Diagnostic Connector (DLC)
- 10A Climate control, Air conditioning control unit
- 10A Center console
- 5A Diagnostic connector (DLC)
- 5A Instrument panel
- 15A Cigarette lighter fuse (front), Ashtray light
The fuse number 9 at 15A is responsible for the operation of the cigarette lighter.
Box under rear seat
Under the rear passenger seat is another box with fuses and relays.
Diagram
Decoding
| 1 | 10A Rear window blind relay |
| 2 | 5A Slip sensor |
| 3 | 30A Fuel pump relay |
| Auxiliary relay, fuel pump | |
| 4 | 50A Heated rear window relay |
| 5 | 10A Trailer control unit |
| 6 | 25A Trailer connector |
| 7 | 30A Trailer control unit |
| 8 | 25A Closing the luggage compartment |
| Luggage compartment open relay | |
| 9 | 7.5A keyless go control unit |
| 10 | 30A Control unit (for taxi) |
| 11 | Reserve |
| 12 | 15A Voice control unit |
| Hands free telephone | |
| 13 | 20A Pneumatic System Equipment (PSE) |
| 14 | 7.5A Telephone |
| 15 | 7.5A Multifunctional control box |
| Antenna amplifier | |
| 16 | Reserve |
| 17 | 25A Sound Amplifier |
| 18 | 25A Power rear seats |
| 19 | 15A Rear air conditioner |
| coolant circulation pump | |
| 20 | 15A Rear air conditioner |
| 21 | 10A Tire pressure monitoring control unit |
| 22 | 25A Seat belt pretensioner front left |
| 23 | 40A Door control unit, rear left |
| 24 | 25A Seat belt pretensioner front right |
| 25 | 40A Door control unit, rear right |
| 26 | 10A Parktronic system |
| 27 | 15A Refrigerator (in the back of the rear seat) |
| 28 | 40A Upper console (in the ceiling) |
| R1 | Rear blind relay |
| R2 | Slip sensor relay |
| R3 | Terminal 15 relay |
| R4 | Fuel pump relay |
| Auxiliary relay, fuel pump | |
| R5 | Heated rear window relay |
That’s all. And if you have something to add – write in the comments.
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Regards
Ash
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