Mercedes 202 fuse and relay

Mercedes 202 is a passenger car of a German auto manufacturer from the C-class series that was produced in 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001 with various engine options (C180, C200, C220 CDI, C230, C240, C280 ) in the w202 sedan and s202 station wagon. During this time, the model has been restyled. In this publication you will find information on the location of all electronic control units, a detailed description of the fuses and relays Mercedes 202 with box diagrams and photo examples. Note the cigarette lighter fuse.

Mercedes 202

The location of the blocks and the purpose of the elements in them may differ from those presented and depend on the year of manufacture and the level of equipment of your car. Check the information against your diagrams on the brochures in or next to the box covers.

Example of a brochure from a box cover

photo of cover

Location

Layout

Location

Assignment

1Air conditioning electronic control unit
2Antenna signal booster – ceiling panel (wagon)
3Anti-theft control unit – right side of the luggage compartment
7Vehicle tilt sensor (anti-theft system)
8Anti-theft horn – behind the front left wheel arch trim
9Volume change sensor (anti-theft system), left – B-pillar
10Volume change sensor (anti-theft system), right – B-pillar
11Audio Output Amplifier – LH Trunk
12Additional heater control unit
13Battery – spare wheel well
14Central locking control unit – functions: Rear window defroster, interior lamp – rear, anti-theft system, trunk lid / rear door lamp, trunk lid / tailgate lock – right side of the luggage compartment
15Diagnostic connector (DLC)
16Door electrical control unit, driver’s side
17Door electrical control unit, passenger side
18Door electrical control unit, driver’s side (rear)
19Door electrical control unit, passenger side (rear)
20Power window control unit / power door mirror control unit – in the center console switch box
21Fuse /Relay Box, Luggage Compartment (spare wheel well)
22Fuse /Relay Box, Engine Compartment 1
23Fuse /Relay Box, Engine Compartment 2
24Headlight range control unit (xenon lamps)
25Horns – behind the front bumper
26Ignition lock control unit
29Multifunctional control unit 1 – functions: Central locking, alarm, rear window defroster, direction indicators, windshield wipers, headlight washers, air conditioning, head restraints (rear), horns
30Multifunctional control unit 2-functions: Interior lamps, sunroof, vanity mirror lamps
31Navigation control unit – spare wheel well
32Ambient temperature sensor
33Parking system control unit – right footwell
34Rain sensor – in the interior rearview mirror
35Rear Wiper/Washer Relay – Behind Tailgate Lower Trim (Wagon)
36Relay Box-Functions: Overload/Surge Protection Relay, Starter Relay, Exhaust Air Pump Relay (Gasoline), Transmission Control System Relay (Diesel)
37Seat heating control unit, front – in the switch block
38Side impact sensor, left – under the front seat
39Side impact sensor, right – under the front seat
40SRS electronic control unit
41Body height sensor, front – headlight control (xenon lamps)
42Body height sensor, rear – headlight control (xenon lamps)
43Phone interface control unit – spare wheel well
44Phone interface control unit – luggage compartment left side (for mobile phone)
45Phone interface control unit – luggage compartment right side (for mobile phone) (station wagon)
46Electronic Transmission Control Module – Front Right Footwell
48Voice Activation Unit – LH Trunk
49Voice activation system unit – right side of the luggage compartment (station wagon)

Engine compartment

Main fuse and relay box

It is located under the hood on the left side of the engine compartment and can consist of two sections (fuses and relays).

Photo of fuse box

Relay

Type 1

Diagram

Relay diagram 0

Designation

  1. Horn relay
  2. Windshield washer pump relay
  3. Windshield wiper motor relay 1
  4. Windshield wiper motor relay 2
  5. Headlight washer pump relay
  6. ABS Pump Motor Relay (TCS/ESP)
Type 2

Diagram

Relay diagram

Allocation

  • A – K3/1 Relay for additional heating of the exhaust turbo line (PSV)
  • B – K20 Pre-fuel pump relay
  • C/D – K9 Auxiliary Fan Relay
  • E – K2 Headlight wiper/washer relay
  • F – K39 Horn relay
  • G – K19/1 Option module relay
  • H – K17 Fan relay
  • K – N10 Combination relay (direction indicators, heated rear window, wiper motor, etc.)
  • L – N7 Lamp control relay

Fuses

Type 1

Diagram

Diagram 1

Appointment

F1(5A) Seat heating control unit (front), seat belt drive (comfort)
F2(5A) Passenger seat sensor, side impact sensors, seat belt pretensioner control unit
F3(15A) Audio system, telephone, voice activation system unit
F4(5A) Instrument cluster
F5(15A) Accessory power connector (station wagon), navigation system, sunblind
F6(7.5A) Folding door mirrors
F7(7.5A) Power door mirrors, power windows, rheostat for dimming the illumination of the instrument cluster, reversing light switch, rear door / trunk lid lock, navigation system, telephone (06/98), control unit (in case of accident) (06/98-05/99)
F8(30A) Door electrical control module, driver’s side
F9(25A) Sunroof, interior lamps, rain sensor, full door lock, instrument cluster illumination rheostat, auto-dimming mirrors, remote central locking system
F10(15A) Audio system, telephone
F11(20A) Seat heater
F12(25 A) Audio system
F13(15A) Reversing lamp(s) (06/98), headlight range control unit (xenon lamps)
F14(5A) Parking system control unit
F15(15A) Rear window wiper/washer (station wagon)
F16(5A) Stability Program
F17(30A) Door electrical control unit, driver’s side (rear)
F18(25A) Turn signal repeaters (^05/98), trailer electrical connector
F19(10A) Instrument cluster, lamp health monitoring unit, daytime lighting control unit
F20(15A) Air conditioning system, heating / ventilation
F21
F22(10A) Combination Switch (Wiper/Windshield Washer, Turn Signals, Low/High Beams, Headlight Washers)
F23(15 A) Cigarette lighter fuse, glove box light
F24(15A) Front/rear markers (right), trailer electrical connector (rear left marker), instrument cluster, license plate lamps, cigarette lighter lamp, headlight washers
F25(7.5A) Front / rear markers (right), trailer electrical connector (rear right marker)
F26(7.5A) Fog lights, trailer electrical connector (fog lights)
F27(15A) Steering column adjustment actuator
F28(10A) Cigarette lighter, minibar
F29(30A) A/C/heater fan motor
F30(10A) Instrument cluster, air conditioning system, heating/ventilation
F31(7.5A / 15A) Right headlight – dipped beam
F32(7.5A/15A) Left headlight – low beam
F33(7.5A) Right headlight – high beam
F34(7.5A) Left headlight – high beam
F35(15A) Fog lights
F36
F37
F38(30A/40A/60A) Air conditioner
F39
F40(10A) Sound signals
F41(15A) Direction indicators, instrument cluster lamps – indicators, horns, windshield wiper/washer, rain sensor, rear window defroster, cooling fan motor, auxiliary heating/air conditioning system, headlight washers, hazard warning lights
F42(7.5A) Windshield washer fluid heater
F43(7.5A) Windshield washer pump motor
F44(40A) Windshield wipers, rain sensor
F45(15A) Headlight washers

The number 23 fuse is responsible for the cigarette lighter.

Type 2

Diagram

Diagram 2

Decoding

F1(7.5A) Direction indicators
F2(15A) Horns, heater control unit
F3(15A) Brake lights, instrument cluster, lamp health monitor, windshield washer jet heaters
F4(7.5A) Dipped beam – right headlight
F5(7.5A) Dipped beam – left headlight
F6(7.5A) High beam – right headlight
F7(7.5A) High beam – left headlight, high beam indicator
F8(10A) Fog lights
F9(30A) Heater fan motor
F10(15A) Instrument cluster and alarm
F11(40A) Rear window heater
F12(10A) Air conditioning system, heater
F13(40A) Windshield wiper motor, windshield washers, headlight high beam switch
F14(15A) Cigarette lighter, glove box light
F15(15A) Front marker – right, rear marker – right, instrument cluster illumination, license plate lamps
F16(7.5A) Front marker – left, rear marker – left
F17(7.5A) Rear fog lamp
F18(7.5A) Heater fan motor control unit, air conditioner condenser fan motor
F19(15A) Trailer electrical connector
F20(7.5A) SRS indicator
F21(15A) Audio system, telephone, seat heating control unit
F22(10A) Rear window blinds
F23(15A) Interior lamps, anti-theft system, rear seat head restraints, rear window wiper/washer
F24(15A) Reversing lights, electric door mirrors
F25(20A) Seat heater
F26(15A) Audio system, telephone
F27(15A) Interior lamps, luggage compartment lamps, central locking, anti-theft system
F28
F29(30A) Air conditioning condenser fan

The number 14 fuse is responsible for the cigarette lighter.

Type 3

Diagram

Diagram 3

Assignment

F1(7.5A) Dipped beam – right headlight
F2(10A/15A) Cigarette lighter, glove box light, audio system
F3(10A) Audio system, heater control, air conditioning
F4(15A) Direction indicators, alarm, clock
F5(20 A) Sound signals, heater control unit, air conditioning
F6(7.5A) Direction indicators – left
F7(7.5A) Dipped beam – left headlight
F8(7.5A) Rear window heater, interior rear view mirrors
F9(7.5A) Cigarette lighter lamp, license plate lamps, instrument cluster
F10Spare
F11(7.5A) Air conditioner
F12(10A) Stop lights, instrument cluster, lamp health monitor
F13(30A) auxiliary heater fan motor
F14(30A) Heater fan motor
F15(30A) Windshield wiper motor
F16(30A) Rear window heater
F17(40A) Air outlet pump motor
F18(7.5A) Front marker – left, rear marker – left
F19(7.5A) High beam – right headlight
F20(10A/15A) Seat heaters, audio system, telephone, sunblind – rear
F21(7.5A) Antenna
F22(10A) Fog lights
F23(15A) Diagnostic connector, overload protection, EVAP valve, exhaust gas recirculation (EGR) valve, variable valve timing actuator, glow plug relay
F24(10A) Front marker – left, rear marker – left
F25(7.5A) High beam – left headlight, high beam indicator
F26(7.5A) SRS indicator, power window control unit, telephone
F27(7.5A) Local lighting lamps Interior lighting lamp
F28(7.5A) Rear fog lights
F29(15A) Reversing lights, power door mirrors, door mirror heaters, windshield washer jet heaters, gear selector position sensor
F30(10A) Washer/headlight cleaner
F31Spare
F32(7.5A) Diagnostic unit
F33(15A) Interior lamps, trunk lamp, vanity mirror lamps, central locking
F34(7.5A) Electric headrest adjustment motors, daytime lighting system
F35(7.5A) Interior lamp – front, anti-theft system, trailer electrical control unit

The number 2 fuse is responsible for the cigarette lighter.

Additional fuse and relay box

It is installed in the pave part of the engine compartment.

Photo right side

Diagram

Diagram 4

Designation

1Electronic engine control unit
2ABS/ESP electronic control unit
3Relay Box – Includes: Overload/Surge Protection Relay, Starter Relay, Exhaust Air Pump Relay – Gasoline
4Starter relay
5Diagnostic connector (DLC)
F1(7.5A) Diagnostic connector (DLC)
F2(10A) ABS/ESP-petrol
F3(10A/25A) Automatic transmission
F4(15A) Mercedes 202 engine management system – gasoline
F5(20A) Engine management system – gasoline
F6(15A) Engine management system – gasoline
F7(40A) Exhaust air pump – petrol

Luggage compartment

There is another fuse box in the luggage compartment next to the battery. Next to it is the fuel pump relay.

Photo LC

Type 1

Photo LC 1

Diagram

Diagram 5

Allocation

F125A Audio system
F27.5A Multifunctional control box
F320A Anti-theft system
F47.5A Antenna
F57.5A Interior lamps
F625A Trailer electrical equipment
F730A Power windows – rear
F830A Power windows – front
F920A Luke
F1030A Power seat – left
F1120A Power seat – left
F1220A Power seat – right
F1320A Power seat – right

Type 2

Diagram

Diagram 6

Appointment

F125A Fuel pump
F230A Central locking control unit
F330A Power window (driver’s door)
F440A Central locking control unit
F530A Power window, driver’s side (rear)
F65A Interior lamp – rear, rear door / trunk lid illumination lamp, power seats
F75A Anti-theft system
F8
F9
F1025A Electric drive of the left front seat
F1125A Electric drive of the left front seat
F1225A Power right front seat
F1325A Power right front seat
F14
F15
F16
F17

Type 3

Diagram

Diagram 7

Decoding

F125A Power seat (left)
F225A Power seat (right)
F325A Power seat (left)
F425A Power seat (right)
F525A Audio system
F67.5A CD changer
F730A Power windows – rear
F87.5A Anti-theft system control unit
F97.5A Multifunctional control box
F1030A Power windows – front
F1120A Anti-theft system, horns
F1220A Seat heater
F1320A Luke
F1425A Anti-theft system
F15Spare
F16Spare
F1730A Telephone
F1825A Trailer electrical equipment
F19Spare

 

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