Table of Contents
The second generation Mercedes-Benz A-Class was introduced in 2004. The body of the car was assembled from high-strength steel alloys with special adhesive joints, inheriting the "sandwich" architecture from its predecessor. In 2008, the car underwent a facelift. In this material, we will analyze in detail the Mercedes fuse circuits in the back of the W169 2nd generation A-class (A150, A160, A170) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 release.
The diagrams of the 2nd generation Mercedes A-class (W169 body: A150, A160, A170) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 year release are considered.
In the passenger compartment
Fuse box
Located in the front passenger's footwell. To access it, you must remove the floor cladding.
General form.
| Diagram | ||
|---|---|---|
|
||
| No. | A | Description |
| 1 | 10 | Before 2008 restyling: Brake light switch |
| 5 | code U58 (exterior lighting): Brake light switch | |
| 2 | 25 | Heated rear window |
| 3 | 7.5 | Instrument cluster |
| EZS module | ||
| 4 | 15 | |
| Electronic steering lock control unit | ||
| 5 | 7.5 | HAU panel module |
| Panel module KLA (automatic climate control) | ||
| 6 | 15 | Right horn |
| Left horn | ||
| 7 | 25 | Fuel module with fuel level sensor (fuel pump fuse) |
| 8 | 25 | Ceiling module-control panel |
| 9 | 40 | ESP and BAS system module |
| 10 | 40 | Fan motor |
| 11 | 30 | Engine 266: Relay el. terminal 87 circuits, motor |
| 40 | Engine 640: Relay el. terminal 87 circuits, motor | |
| 12 | 5 | steering column module |
| Multifunction steering wheel | ||
| 13 | 25 | Front left door module |
| 14 | 25 | Front Right Door Module |
| 15 | 25 | ESP and BAS system module |
| 16 | 10 | Diagnostic connector |
| PTS module (parking sensors, dorestyling) | ||
| 17 | 5 | Rotary switch for outdoor lighting |
| 18 | 7.5 | KP 711, 716: Reversing signal switch |
| 19 | 5 | Micromechanical yaw rate sensor AY |
| 20 | 7.5 | Passive safety system control module |
| 21 | 30 | Starter |
| 22 | 7.5 | Instrument cluster |
| 23 | 20 | Engine 640 (from 1.9.08): Fuel filter condensate sensor with heating element |
| 7.5 | Before 2008 restyling: Heated washer nozzles | |
| 24 | 7.5 | Power steering (ES) module |
| 25 | 7.5 | Brake light switch |
| ESP and BAS systems | ||
| 26 | 7.5 | KP 722: electronic selector lever module |
| 27 | 10 | KP 722: CVT (continuously variable automatic transmission) |
| 28 | 5 | Rotary switch for outdoor lighting |
| 29 | 30 | SAM module |
| 30 | 25 | Relay el. circuit terminal 87F |
| 31 | 5 | Rotary switch for outdoor lighting |
| Central interface module (vehicles up to 30.11.05) | ||
| 32 | 7.5 | Engine 266: Module ME |
| 33 | 15 | Audio system |
| Audio module and navigation box | ||
| Control and display unit COMAND | ||
| 34 | 25 | Rear left door |
| 35 | 25 | Rear right door |
| 36 | 10 | After restyling 2008: PTS module (parking sensors) |
| Trailer | ||
| 7.5 | Before 2008 restyling: Trailer | |
| Electrical connector mobile phone chain | ||
| 37 | 7.5 | SRS system |
| Front passenger seat passenger / child seat recognition sensor | ||
| Front passenger seat occupied recognition system | ||
| 38 | 25 | Front cigarette lighter fuse with illumination |
| 39 | 25 | Wiper motor |
| 40 | 25 | Sectional roof: Overhead control panel (sunroof motor) |
| 7.5 | Overhead control panel | |
| 41 | 15 | tailgate wiper motor |
| 42 | 7.5 | Glove compartment lighting with microswitch |
| Vanity mirror lighting left and right | ||
| Pedal depression control sensor (package for driving school) | ||
| Footwell light switch (driving school bag) | ||
| Pluggable connection VICS + ETC power supply (Japan) | ||
| Emergency call system control unit (USA) | ||
| 43 | 7.5 | Engine 266: handpiece electr. circuit terminal 87M1e |
| 15 | Engine 640: handpiece electr. circuit terminal 87M1e | |
| Dual-fuel gas-petrol Engine: electric tip. circuit terminal 87M1e | ||
| 44 | 15 | Engine 266: handpiece electr. circuit terminal 87M2e |
| 20 | Engine 640: handpiece electr. circuit terminal 87M2e | |
| 45 | 25 | Engine 640: CDI system |
| 46 | 25 | Woofer (Japan, restyled 2008) |
| 40 | Speaker amplifier (after restyling 2008) | |
| 7.5 | UHI (Universal Mobile Phone Interface) module (before restyling) | |
| GSM 1800 network compensator (before restyling) | ||
| Phone (Japan, before restyling) | ||
| 47 | 7.5 | Electrical connector mobile phone chain |
| UHI Module (Universal Mobile Phone Interface) | ||
| Voice control system module (dorestyling) | ||
| Phone module (Japan, do-styling) | ||
| 48 | 7.5 | EDW / Towing Protection / Interior Protection System |
| Alarm siren | ||
| 49 | 25 | Upper control panel |
| pre-styling : heated cushion and backrest of the front left and right seats | ||
| 50 | 7.5 | multimedia interface (restyling) |
| Digital TV tuner (restyling) | ||
| Digital sound broadcasting system unit (restyling) | ||
| CD changer (dorestyling) | ||
| Pluggable connection VICS + ETC power supply (Japan, do-styling) | ||
| 30 | Service vehicles: Roof beam | |
| tip electr. terminal 30 circuits | ||
| 51 | 10 | Passenger Weight System (WSS) Module (Canada) |
| Control panel for special signaling system (service vehicles) | ||
| 52 | 7.5 | Emergency call system (vehicles up to 31.5.06) |
| 5 | VICS + ETC power supply connector (Japan, vehicles up to 31.5.06) | |
| 53 | 30 | Interior socket 12V |
| Rear cigarette lighter fuse Mercedes A150, A160, A170 with illumination | ||
| 54 | 15 | Service vehicles : 2-pin 12V socket |
| 25 | pre-styling : Speaker amplifier / Woofer | |
| 55 | 7.5 | Dorestyling and restyling with code 614: Front left and right headlight |
| 10 | Restyling: Front left headlight | |
| 56 | 10 | Restyling: Front right headlight |
| 57 | 15 | restyling: AHV towing hitch plug, 13-pin |
| 20 | Audio interface control unit (Japan pre-styling) | |
| 7.5 | Emergency call system control unit | |
| SDAR module | ||
| 58 | 25 | Trailer module |
| 59 | 20 | AHV trailer coupling, 13-pin |
| Trailer control module (vehicles up to 31.5.05) | ||
| 60 | 20 | Driver's seat contact strip |
| 61 | 20 | Front passenger seat contact strip |
| 62 | 40 | Restyling: Relay el. terminal 15 (2) circuits (accessories: xenon headlights, mobile phone) |
| 25 | Dorestyling: Relay el. terminal 15 (2) circuits (accessories: xenon headlights, mobile phone) | |
| 63 | 7.5 | SDAR module (Canada) |
| 25 | Roof beam (company cars) | |
| 64 | 40 | Engine 266: Air Pump Relay |
| 80 | Engine 640: End of glow plug time | |
| 65 | 80 | Power steering module (ES) |
| 66 | 60 | SAM module |
| 67 | 50 | Relay el. terminal 15R (2) circuits (accessory) |
| 68 | 50 | Standard equipment (restyling): Suction electric fan of the engine and air conditioner with integrated regulator ( Dorestyling: (valid for engines 266.920 and 266.940 with gearbox 722)) |
| 60 | Special equipment (restyling): Dorestyling: (valid for engines 640.940, 640.941, 266.960, 266.980 and for engines 266.920, 266.940 with code (550): Trailer coupling)) | |
| 69 | 50 | Relay el. terminal 15R circuits (1) |
| 70 | 60 | Relay el. terminal 15 circuits (1) |
| 71 | 150 | Engine 640 : PTC heater |
| 72 | 60 | Dorestyling : electric tip terminal 30 circuits |
| Service vehicles : | ||
| Fuse 7 (F7f7) | ||
| Fuse 10 (F7f10) | ||
| Taxi : | ||
| Multifunctional unit (MSS) | ||
Relay box
An additional mounting block with relay modules is located behind the passenger side trim (K100).
For access:
1. Remove the lining under the glove compartment.
2. Dismantle the panel near the door.
3. Move the floor sheathing to the side.
| K100 block diagram | ||
|---|---|---|
|
||
| No. | Relay description | |
| A | Relay, circuit 15R (2) (SA) | |
| B | Circuit 15R relay (1) | |
| C | Horn | |
| D | heated rear window | |
| E | 1/2 wiper speed | |
| F | on / off wiper | |
| G | circuit 15 (1) | |
| H | Reserve | |
| I | Air pump | |
| K | Fuel module (fuel pump relay) | |
| L | Engine circuit 87 relay | |
| M | Starter | |
| N | Chain 87F | |
| O | Circuit 15 (2) (SA: xenon, cell phone) | |
| No. | Appointment | A |
| 80 | Taxi | 30 |
| 81 | 30 | |
| 82 | 30 | |
| 83 | 30 | |
General arrangement
Location of the electrical equipment.
|
|
| No. | Component |
| 1 | ABS module |
| 2 | Air conditioner control unit - in the heater control panel |
| 3 | Antenna signal amplifiers |
| 4 | |
| 5 | Left shock sensor |
| 6 | Right shock sensor |
| 7 | Anti-theft control module |
| 8 | Vehicle tilt sensor (anti-theft system) |
| 9 | Anti-theft system horn - on the resonator of the intake system |
| 10 | Volume change sensors (anti-theft system) |
| 11 | Audio system |
| 12 | Additional heater |
| 13 | Battery |
| 14 | CAN data bus, gateway control unit |
| 15 | Central locking signal sensor (infrared) - in the driver's door handle |
| 16 | Diagnostic connector (DLC) |
| 17 | Left front door module |
| 18 | Left rear door module |
| 19 | Right front door module |
| 20 | Right rear door module |
| 21 | Dashboard relay box |
| 22 | Fuse box, footwell |
| 23 | Klaxon - behind the front bumper |
| 24 | Ignition switch control module |
| 25 | Immobilizer - (combined with the ignition switch control unit) |
| 26 | immobilizer antenna |
| 27 | Turn signal / alarm relay - in multifunction control box |
| 28 | Lighting unit |
| 29 | Multifunction control module - connected to the footwell fuse / relay box -functions: Interior lights, exterior lights, horns, windshield wipers, central locking, power windows, direction indicators, anti-theft system, sunroof, seat heaters, immobilizer |
| 30 | Multifunction steering wheel controls |
| 31 | Multi-function switch control unit |
| 32 | Navigation module |
| 33 | Outdoor air temperature sensor |
| 34 | Parktronic module |
| 35 | Power steering control unit |
| 36 | Rain sensor - inside rearview mirror |
| 37 | Seat heating module |
| 38 | Seat occupant sensor |
| 39 | Steering column electronics control unit |
| 40 | SRS system |
| 41 | Telephone connection module |
| 42 | Phone interface |
| 43 | Trailer electrical equipment |
| 44 | Gearbox module - in the gearbox |
| 45 | Relay for intermittent operation of the windshield wiper |
