Table of Contents
The second generation C-Class (W203) appeared in 2000 and was produced in three bodies: sedan, station wagon and coupe, which was a sporty three-door hatchback. The sedan that served as the basis for the C-Class family in this generation differs from its predecessor in a sporty design with a dynamic silhouette. In this material, we will analyze in detail the fuse circuits for the Mercedes C-class of the 2nd generation (W203: C160, C180, C230, C240, C280, C320) 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007 release.
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 engine compartment
Fuse box
The mounting block is located on the left side of the engine compartment.
General form.
| Diagram | ||
|---|---|---|
|
||
| No. | Decoding | A |
| F43a | Horn relay | 15 |
| F43b | 15 | |
| F44 | Telephone | 5 |
| F45 | SRS electronic unit | 7.5 |
| F46 | Windshield wiper motor relay | 40 |
| F47 | Glove box illumination lamp, front cigarette lighter fuse w203 - C160, C180, C230, C240, C280, C320 . | 15 |
| F48 | Brake booster control unit (engine 112) | 15 |
| F49 | SRS electronic unit | 7.5 |
| F50 | Lighting control unit | 5 |
| F51 | Air conditioning system, headlight range control unit, instrument panel, cooling fan motor | 7.5 |
| F52 | Starter | 15 |
| F53 | Engine management system (petrol), multifunction control unit 2 | 15 |
| F54 | Engine management system, air conditioning system (petrol) | 7.5 |
| F55 | Steering wheel position sensor, sequential manual transmission - with manual transmission | 7.5 |
| F56 | Brake light switch (brake pedal position sensor), electronic stability control (ESP) | 5 |
| F57 | Steering wheel position sensor, electronic engine control module (ECM) (engine 112), electronic ignition switch | 5 |
| F58 | Gearbox (sequential manual transmission) | 40 |
| F59 | ESP (Vehicle Stability Support) | 50 |
| F60 | 40 | |
| F61 | Gearbox (sequential manual transmission) | 15 |
| F62 | Diagnostic connector (DLC), lighting control unit, brake light switch (brake pedal position sensor) | 5 |
| F63 | Lighting control unit | 5 |
| F64 | Audio system | 10 |
| F65 | Exhaust air pump motor (if equipped) | 40 |
| No. | Relay | |
| I | Horn | |
| K | Transmission (sequential manual transmission) | |
| L | Windshield wiper motor relay (1st and 2nd speed) | |
| M | Ignition circuit | |
| N | Gearbox pump (sequential manual gearbox) | |
| O | Exhaust air pump (112/113/271 engines) | |
| P | Ignition circuit | |
| Q | Windshield wiper motor (ON / OFF) | |
| R | Engine management system | |
| S | Starter | |
Power fuse panel
Next to the battery is a board consisting of power fuses.
| Diagram | ||
|---|---|---|
|
||
| No. | Description | A |
| 1 | Fuse box in the cabin | 125 |
| 2 | SAM control unit, rear | 200 |
| 3 | Additional fuse box | 125 |
| 4 | SAM control unit, front | 200 |
| 5 | Electric suction fan for engine and air conditioner with integrated regulator | 125 |
| Diesel engines: Preheat output stage | 125 | |
| 6 | SAM control unit, front | 60 |
In the passenger compartment
The fuse box is located in the left end of the dashboard behind a plastic cover.
Access example.
| Diagram | ||
|---|---|---|
|
||
| No. | Description | A |
| F21 | electrical equipment of the left front door | 30 |
| F22 | electrical equipment of the right front door | 30 |
| F23 | Cigarette lighter fuse mercedes w203 - C160, C180, C230, C240, C280, C320. | 15 |
| F24 | - | |
| F25 | Heated rear window | 10 |
| F26 | Audio system output amplifier | 30 |
| F27 | Front left power seat control unit | 30 |
| F28 | - | |
| F29 | Multifunctional control unit (taxi) | 30 |
| F30 | Air conditioner / heater fan motor | 40 |
| F31 | egnition lock | 20 |
| F32 | electrical equipment of the left rear door | 30 |
| F33 | electrical equipment of the right rear door | 30 |
| F34 | Telephone | 7.5 |
| F35 | Additional heater | 30 |
| F36 | - | |
| F37 | Brake booster vacuum pump | 25 |
| F38 | power front right seat | 30 |
| F39 | - | |
| F40 | Multifunctional control unit (taxi) | 30 |
| F41 | Air conditioning / heater, multifunction switch control unit (upper) - center console (^ 05/01) | 7.5 |
| F42 | Instrument cluster | 7.5 |
In the luggage compartment
The unit is located on the left side of the luggage compartment.
Photo is an example.
| Diagram | ||
|---|---|---|
|
||
| No. | Circuit breakers | A |
| F1 | power front left seat | 30 |
| F2 | electric seat, right front. power seat relay (front) | 30 |
| F3 | tire pressure monitoring system, interior lamp (rear) | 7.5 |
| F4 | Fuel pump fuse w203 (gasoline engines) | 20 |
| F5 | - | |
| F6 | - | |
| F7 | - | |
| F8 | Antenna signal amplifier, anti-theft alarm horn, vehicle tilt sensor (anti-theft system) | 7.5 |
| F9 | electric sunroof | 25 |
| F10 | Heated rear window | 40 |
| F11 | - | |
| F12 | Accessory power connector (rear cigarette lighter) | 15 |
| F13 | Lumbar support pump, spotlights (rear), telephone | 5 |
| F14 | Rear window wiper motor (station wagon) | 10 |
| F15 | Relay 1 of the drive of the lock of the fuel filler neck | 10 |
| F16 | Telephone | 20 |
| F17 | Trailer control unit | 20 |
| F18 | Trailer electrical connector | 20 |
| F19 | Lumbar support pump | 20 |
| F20 | Rear window blind relay | 7.5 |
| No. | Relay modules | |
| A | Fuel pump relay | |
| B | Ignition circuit | |
| C | - | |
| D | - | |
| E | heated rear window | |
| F | Ignition circuit | |
| G | Actuators 1 and 2 of the fuel filler neck lock | |
| H | ||
General arrangement
Location of the electrical equipment.
|
|
| No. | Element |
| 1 | Air conditioning / heater control module - in the heater control panel |
| 2 | A / C / Heater Fan Control Module - Near Fan Motor |
| 3 | Air purity sensor (air conditioning system) |
| 4 | Sunlight sensor (air conditioning system) |
| 5 | Antenna amplifier - 1, upper part of rear window |
| 7 | Anti-theft control module (combined with the multifunction control unit) - left side of the luggage compartment |
| 8 | Vehicle tilt sensor (anti-theft system) - left side of luggage compartment |
| 9 | Anti-theft alarm sound - behind the wheel arch trim |
| 10 | Volume change sensors (anti-theft system) |
| 11 | Audio module - in the navigation system |
| 12 | Audio Output Amplifier (If Equipped) -Right Luggage Compartment |
| 13 | Additional heater control unit |
| 14 | Additional heater remote control receiver - under dash (rear luggage compartment) |
| 15 | Battery |
| 16 | Brake booster vacuum pump control unit |
| 17 | Central locking signal sensor (infrared) - in the driver's door handle |
| 18 | Diagnostic connector (DLC) |
| 19 | Driver's door control module |
| 20 | Rear left door electrical control module |
| 21 | Passenger door electrical control module |
| 22 | Rear right door electrical control module |
| 23 | Fuse / relay box, engine compartment 1 |
| 24 | Passenger compartment fuse box |
| 25 | Fuse / Relay Box, Luggage Compartment |
| 26 | Headlamp control module, left (models with xenon headlights) |
| 27 | Headlamp control module, right (models with xenon headlights) |
| 28 | Sound signals 1 / 2- behind the grille |
| 29 | Ignition switch control module |
| 30 | Electronic immobilizer control module - (combined with the ignition switch control unit) |
| 31 | Turn signal / alarm relay - in multifunction control unit 2 |
| 32 | Lighting control module - behind the headlight switch |
| 34 | Multifunction control unit 1 - Attached to engine compartment fuse / relay box - Functions: Interior lamps, headlights, horns, windscreen wipers, air conditioning pressure monitoring, headlight washers, coolant level, brake fluid level, thermometer, electric drive door mirrors |
| 35 | Multifunctional control unit 2 - interconnected by fuse / relay box, luggage compartment-functions: Central locking, fuel level, anti-theft system, alarm, rear window defogger, taillights, tailgate opening drive, rear window wiper (station wagon) |
| 36 | Navigation control module |
| 37 | Ambient temperature sensor |
| 38 | Parking system control module - under the dash, in the rear of the luggage compartment |
| 39 | Rain Sensor - Windshield Upper Center |
| 40 | Seat power control module (with memory), front left - under the seat |
| 41 | Seat power control module (with memory), front right - under the seat |
| 42 | Seat heating control module, front -in the block of switches |
| 43 | Electronic control unit for gearbox - sequential manual gearbox |
| 44 | Side impact sensor, left - under the rear seat |
| 45 | Side impact sensor, right-under the rear seat |
| 46 | SRS electronic control unit |
| 47 | Steering column control module - behind the steering wheel |
| 48 | Steering column lock control module - integrated in the ignition lock control unit |
| 49 | Sunroof control module |
| 50 | Height sensor, front (models with xenon headlights) - front anti-roll bar |
| 51 | Height sensor, rear (models with xenon headlights) - rear axle |
| 52 | Telephone connection module - under the panel, in the rear of the luggage compartment |
| 53 | Phone interface control module - under the dash, in the rear of the luggage compartment |
| 54 | Telephone transceiver - under the dash, in the rear of the luggage compartment |
| 55 | Trailer electrical control module - under the panel, in the rear of the luggage compartment |
| 56 | gearbox control unit |
| 57 | Gear Shift Control Module - Automatic Transmission Selector |
| 59 | Voice activation system module - under the dash, in the rear of the luggage compartment |
| 60 | Fuse box, engine compartment 2 |
merci