What is the construction and purpose of automotive electrical systems?

Automotive electrical systems are a set of components responsible for starting, charging, powering consumers, and controlling vehicle electronics. They include, among others, the battery, alternator, starter, fuses, relays, controllers, and wiring harnesses. These components are located in different parts of the car and work together through connectors and signal buses.

What are automotive electrical systems used for?

Automotive electrical systems are used to supply energy and transmit control signals to vehicle components. Thanks to them, it is possible to start the engine, charge the battery, and operate lights, windows, air conditioning, and safety systems. A fault in one circuit can affect not only comfort but also the correct operation of other modules.

What role does the wiring harness play in a car?

The wiring harness is an organized set of wires, covers, and connectors that connects individual consumers and controllers in the vehicle. It is used to transmit power, ground, and signals between modules. Its construction depends on the body version, equipment, and mounting location, so when replacing it, you must compare the wire routing, plug type, and number of pins.

How to choose an electrical part for a specific car?

The safest way is to compare the OEM number, manufacturer number, connector type, and mounting location. It is also worth considering the engine version, year of manufacture, body type, and equipment, as the same model may have different variants of the alternator, starter, or controller. In practice, verification by VIN is very helpful.

What symptoms indicate a problem with the electrical system?

Typical signals include difficulty starting, flashing warning lights, dimming lights, unstable charging, or the failure of selected consumers. In some cases, controller errors, air conditioning malfunctions, or periodic power outages also occur. Symptoms must always be linked to a specific circuit and cooperating component.

How to take care of automotive electrical systems in daily use?

The basis is regular inspection of the battery condition, terminals, ground wires, and charging. It is also good to check the tightness of housings, the condition of harness insulation, and the cleanliness of contacts exposed to moisture. A quick reaction to the first symptoms of voltage drops or electronic errors makes it easier to avoid a major failure.

Automotive electrical systems

At Global Parts, we offer a wide selection of original used car parts, including automotive electrical systems for many popular car brands such as BMW, Mini, Mercedes, Audi, Volkswagen, and others. Each of our car parts undergoes quality control to ensure you receive a top-quality product.

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Mercedes V177 W247 Body Control Module BCM V2 Unit ECU A2479008109

€118.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2129001929

Mercedes W176 Keyless Control Module Unit ECU A2129001929

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2059007143

SAM Module Mercedes W205 Trunk Rear SAM Control Module A2059007143

€85.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2058201201

Sunroof Wiring Mercedes C205 C238 Panoramic Motor Cable Harness A2058201201

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2034404432

PDC Wiring Mercedes CL203 Front Bumper Parking Sensor Loom Cable A2034404432

€66.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A9079020303

Mercedes Sprinter W907 W910 AIr Module Sensor Unit ECU A9079020303

€113.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1729008206

Interface Module Mercedes W176 W204 W212 Multimedia Control Unit A1729008206

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2213201058

Mercedes R231 Valve Block Air Suspension Control Unit A2123200358

€203.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2118703485

Mercedes W211 Door Module Rear Right O/S Control Unit ECU A2118703485

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0009006302

Mercedes W176 Automatic Gearbox Transmission Module Control Unit ECU A0009006302

€32.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1715400107

Mercedes SLK R171 Window Lifter Lift Switch Cable Wiring Harness A1715400107

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2469055003-1

Ignition Switch Mercedes W167 W177 W247 Lock Control Unit Module A2469055003

€51.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A6519006401-2

Mercedes W205 C300h 651.921 204HP Engine ECU Kit Key + Ignition A6519006401

€180.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1775405340

Mercedes W177 Door Wiring Harness Cable Loom Front A1775405340

€37.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2038703589

Mercedes W203 CD Player Radio Audio Sat Nav Navigation A2038703589

€146.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A6429004300

Mercedes W221 Engine Control Unit Module ECU A6429004300

€189.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2465407811

Mercedes A45 AMG W176 Door Wiring Loom Harness Wire Rear Left N/S A2465407811

€108.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2035407308

Mercedes-Benz C-Class W203 Rear Left Right Door Wiring Loom Harness A2035407308

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0005456616

Mercedes W212 Automatic Gearbox EGS Control Module Unit ECU A0005456616

€32.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1645401908

Mercedes ML W164 Rear Left Door N/S Ribbon Electrical Cable Wiring

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2518204426

Mercedes V251 W164 Front Lamp Headlight Control Module Unit HELLA A2518204426

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0009063000-1

Alternator Generator Mercedes W204 W212 M271 Engine Valeo 150A 14V A0009063000

€99.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1645453047

Mercedes ML W164 Trunk Tailgate Foam Control Unit Module Bracket A1645453047

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2118202464-1

Mercedes W211 Tail Lamp Rear Light Right O/S Harness Loom Wire Cable A2118202464

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2074402805

Mercedes W207 Head Unit Navigation Media Cable Wiring Harness A2074402805

€32.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2055401510

Mercedes C Class W205 Door Wiring Loom Harness Rear Right O/S A2055401510

€89.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2721533291-1

Mercedes C219 Engine Control ECU Module 272 HP CLS 350 Automatic A2721533291 KIT

€569.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0009050254

Mercedes W212 Negative Battery Cable Terminal Wiring A0009050254

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2465405833

Mercedes W176 W246 Starter Cable Loom Wiring 160 180 CDI Diesel A2465405833

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2135402870

Ground Cable Mercedes C238 Fuse Box Wire Prefuse Box Wiring A2135402870

€32.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2055401604

Mercedes W205 Battery Cable Wiring Harness Loom Petrol Hybrid A2055401604

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A6395480174

Mercedes-Benz Vito W639 Fuse Box Cooling Outlet Pipe Air Duct A6395480174

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1664409735

Mercedes ML W166 Battery Cable Alternator Starter Motor Wiring A1664409735

€32.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1775404910

Cable Wiring Mercedes W177 W247 Fuel Pump Sending Unit Plug Socket A1775404910

€47.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1729058300

Mercedes SLK R172 Pedestrian Protection Impact Crash Sensor Module A1729058300

€32.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1779069505

Mercedes C118 W177 H247 X243 Centre Console Ambient Light Wiring A1779069505

€61.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2059004433

Mercedes W205 Head Unit Radio CD Player Audio Sat Nav Multimedia A2059004433

€237.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2539009309

Mercedes C253 W293 Rain And Light Sensor Control Unit Module ECU A2539009309

€66.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2075403332

Convertible Cable Mercedes A207 C207 Roof Rail Wiring Harness A2075403332

€32.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2118203042

Mercedes E-Class W211 S211 Front Right Door O/S Window Lifter Motor Regulator

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2059009643

Mercedes W205 Telematics Bluetooth Module Control Unit ECU A2059009643

€51.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2049000308

Mercedes C204 Radio Multimedia CD Player Head Unit A2049000308

€165.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2469008819-2

Radio Head Unit Mercedes W176 W246 Audio 20 Media Player Navigation A2469008819

€265.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0009002218

Mercedes C253 Fuel Pump Module Control Unit ECU A0009002218

€70.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2055408542

Mercedes W205 Front Passenger Door Wiring Harness Cable A2055408542

€80.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0005400864

Mercedes C300h W205 Hybrid Negative Battery Ground Earth Cable A0005400864

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2079059702

Mercedes-Benz W207 A207 Radio Aerial Antenna Amplifier Module Unit Right O/S

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2135405044

Mercedes W213 Door Wiring Loom Harness Cable Front Driver's Side A2135405044

€42.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2048200104

Sun Roof Wiring Mercedes W204 Panoramic Roof Motors Drive Harness A2048200104

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2049005908-4

Mercedes W204 Satelite Navigation CD Player Radio Sat Nav Head Unit A2049005908

€132.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2218700992

Mercedes W221 Rear Seat Bench Module Control Unit Controller A2218700992

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1715409606

Mercedes R171 Wiring Cable Harness Front Passenger Door Wiring Loom A1715409606

€42.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A6402002770-1

Alternator Belt Tensioner Mercedes W169 W245 OM640 Diesel Holder Mounting Panel

€32.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1664409708

Mercedes ML GLE W166 Starter Wiring Loom Harness Cable OM651 Diesel A1664409708

€70.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2054406633

Mercedes C205 Door Wiring Front Door Left N/S wiring Harness A2054406633

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A6429002900-10

Mercedes W164 ML350 CDI 642.820 231HP Engine ECU Kit A6429002900 Ignition + Key

€332.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1635400382

Mercedes ML W163 Fuse Relay Box ECU Cover Trim A1635400382

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A6569000200-1

Mercedes W213 E400d OM656.929 Diesel Engine ECU Kit A6569000200 Automatic

€569.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1178207061-2

Mercedes CLA C117 LED Headlight Lamp Front Driver's Side Wire Loom A1178207061

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2761591125

Mercedes W205 Engine Wire Wiring Loom Harness C43 M276 Petrol A2761591125

€208.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A6519007401-1

Mercedes W212 E250CDI Blue Efficiency OM651 204HP Engine ECU A6519007401 Key

€303.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2139001710

Keyless Go Mercedes W213 W222 Keyless Entry Control Unit Module A2139001710

€32.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2056102702

Mercedes W205 Battery B Engine Compartment Terminal Point A2056102702

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2469006816

Mercedes W176 W231 W246 Electric Parking Brake Control Unit Module A2469006816

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0005405950

Mercedes W906 Starter Wiring Fuse Box Terminal Block Cable Harness A0005405950

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2055406292

Mercedes C205 Rear Parking PDC Sensor Loom Wiring Harness Cable A2055406292

€56.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2135407044

Mercedes W213 Door Wiring Loom Harness Cable Front Passenger's Side A2135407044

€42.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A6401500734

Mercedes W169 W245 A200 B200 CDI OM640.941 140HP Engine Module ECU A6401500734

€113.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1729000102

Mercedes SLK R172 GPS Navigation System Screen Display A1729000102

€118.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2129002401

Mercedes S212 Air Suspension Control Module A2129002401

€189.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2469050201

Mercedes C117 X156 Antenna Amplifier Control Unit Module A2469050201

€32.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1635450716

Mercedes W163 FBS Switch Keyless Entry Module Control Unit ECU A1635450716

€47.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2514401409

Mercedes ML W164 Door Wiring Harness Front Left Right N/O/S Loom A2514401409

€37.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0009058112

Mercedes C118 W177 W247 Negative Battery Terminal Cable Lead A0009058112

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1775408312

Door Wiring Mercedes W177 W247 Driver Side Cable Harness Loom A1775408312

€32.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1648205685

Air Module Mercedes ML W164 W251 SRS Control Unit ECU A1648205685

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1779002207

Mercedes W177 Rear Left Right N/O/S Door Control Module A1779002207

€42.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0015424523

Parktronic Display Mercedes W207 W212 PDC System Parking Sensor A0015424523

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2129063001-1

Radio Head Unit Mercedes W212 Command Navi CD DVD Player Navigation A2129063001m

€161.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1648701089

Mercedes GL X164 Antenna Amplifier Control Unit Module A1648701089

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2829006700

Mercedes W177 A200 M282.814 163HP Engine Control Unit ECU A2829006700 Automatic

€284.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2519062200-1

Mercedes W251 COMAND Navigation Head Unit Radio Sat Nav Screen A2519062200

€332.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2218210006

Door Cable Mercedes W221 W216 Front Wiring Loom Seat Control Switch A2218210006

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0025428719-1

Mercedes W176 W204 W207 W166 Relay 4 Pin Grey Hella SET X2 A0025428719

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1644406910

Mercedes ML W164 Door Wiring Harness Rear Left Right N/O/S Loom A1644406910

€37.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2479052503

Mercedes Sprinter W910 Remote Key Control Unit A2479052503

€94.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A4475406353

Mercedes Vito W447 Battery Cable Diesel OM651 Alternator Wiring A4475406353

€47.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1648204164-2

Mercedes GL X164 Rear Lamp Light Side Panel Wiring Cable Left N/S A1648200564

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A6519002803-3

Mercedes Vito W447 114 CDI OM651.950 Engine ECU Kit Ignition + 2 Key A6519002803

€474.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2535400701

Mercedes A238 M276 Engine Alternator Wiring Loom Harness A2535400701

€61.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2055407616

Wiring Mercedes W205 Electrical Cable Transmission To Body A2055407616

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0005440456

Mercedes W163 Green Relay 2-Pin ML350 112970 3.7 Petrol 245HP A0005440456

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2139001726

Mercedes W205 W247 W253 Distronic Radar Sensor Control Unit Module A2139001726

€237.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2475464000

Mercedes C118 W177 C247 Positive Battery Cable Cover Trim Tray A2475464000

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2055405203

Mercedes W205 Negative Cable Battery Lead Minus Pole Wiring A2055405203

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0009820512

Energy Distributor Mercedes W177 W212 Power Control Unit Module A0009820512

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2205408110

Mercedes W220 Battery Wire Starter Alternator Cable 55 AMG 113986 A2205408110

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2118704126

Mercedes W221 Door Control Module Right Rear O/S A2118704126

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2469000012-2

Mercedes W176 W246 Radio Head Unit COMAND Navi Player Control Unit A2469000012

€170.95

Free delivery: Sep 23 – 24

If paid before 14:00

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