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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Alternator Wire Mercedes Vito W447 Battery Alternator Cable A4475406777

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2115400131

Mercedes C219 Battery Starter Alternator Ground Earth Cable A2115400131

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A1775455800

Mercedes W177 AMG Control Unit Bracket Module Holder Mount A1775455800

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A4155401005

Mercedes Citan W415 Renault Kangoo Front Door Wiring Loom Left N/S 8200809160

€37.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A1665402450-1

Mercedes ML W166 Fuse Box Front Relay Control Unit Module A1665402450

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2135405542

Mercedes W205 Electrical Wire From Transmission To Body Ground Cable A2135405542

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2059008917

Mercedes W205 Head Unit Radio CD Player Audio Sat Nav Control A2059008917

€85.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2229002108

Mercedes W205 S205 Rear Door Control Module Left N/S A2229002108

€47.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A1679008311

Mercedes C238 Door Control Unit Module ECU Front Left N/S A1679008311

€42.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A0025428019

Relay Mercedes W176 W246 4-Pin Black Hella 12V A0025428019

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A0018209726

Mercedes-Benz C CLK Class W203 W209 Airbag Control Unit Module ECU A0018209726

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2129060605-1

Mercedes W212 Fuse Box Rear Relay Control Unit Electric Module SAM A2129060605

€80.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A0005400902

Mercedes W212 Vito W447 Adblue Injector Nozzle Wiring Harness Cable A0005400902

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A0009821012

Mercedes W166 W213 C238 Power Distribution Plate Control Unit Module A0009821012

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2055400428

Battery Wiring Mercedes GLC X253 C253 Diesel OM651 Starter Cable A2055400428

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2129007024

Mercedes CLS C218 Front Fuse Relay Box On Board Supply A2129007024

€75.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A0014460340

Mercedes W245 B150 CDI OM266.920 Engine Control Unit Module ECU A0014460340

€32.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A6461503378

Mercedes W639 Engine Control Unit ECU 88HP 2.1 Diesel 109 CDI Manual A6461503378

€237.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A1698209926

Mercedes W169 W245 ECU Air Control Unit Sensor Module A1698209926

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A0005468502

Battery Cover Mercedes W205 W212 Battery Positive Pole Cover Red A0005468502

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2229052705

Mercedes W205 Rear Switch Unit Tailgate Trunk Boot Lid Control ECU A2229052705

€113.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A1635407505

Mercedes W163 Electric Seat Adjuster Motor Wiring Harness Cable A1635407505

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A1664402406

Mercedes ML W166 Front Door Wiring Harness Cable Driver Side A1664402406

€32.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A0035423019-1

Power Relay Control Mercedes W176 W246 Module 4 Pin 12V 20A SET A0035423019

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A1718300272

Mercedes A B ML Class W166 W169 W245 Interior Temperature Sensor A1718300272

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2124407952

Battery Cable Mercedes W212 W218 Negative Lead Terminal Harness A2124407952

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A1645400850

Mercedes W164 W251 Positive Battery Cable Wiring Loom OM642 Diesel A1645400850

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A1131531579

Mercedes W215 W220 S 55 AMG 113.986 360HP Engine ECU Control Unit A1131531579

€184.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2489054201

Antenna Amplifier Mercedes X117 W176 W205 Rear Aerial Module A2489054201

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A9075402087

Mercedes W907 Starter Wiring Battery Alternator Cable Harness Loom A9075401305

€32.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2055400972

Mercedes C205 iDrive System Wiring Loom Harness Cable Unit A2055400972

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A6421507991-1

Mercedes C219 320 CDI 224HP OM642.920 Engine Unit ECU Kit A6421507991 Automatic

€275.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2123300135

Mercedes W212 Front Axle Suspension Wishbone Ball Joint Mount A2123300135

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A0555452928

Mercedes W204 C207 C209 W212 W222 Engine Wiring Loom Harness Cable A0555452928

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2114404705

Fan Wiring Mercedes W204 W211 Heater Blower Unit Motor Cable Harness A2114404705

€51.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2118704026

Mercedes W211 Door Module Rear Left N/S Control Unit ECU A2118704026

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A1769980001

Door Wiring Plug Mercedes W176 W246 Cable Lead Connector A1769980001

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A1665404802

Mercedes W166 Front Seat Headrest Wiring Cable Harness A1665404802

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A1175402605

Mercedes C117 Rear Door Wiring Loom Harness Cable Left N/S A1175402605

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2478207502

Mercedes C118 W177 W243 W247 Centre Console Dual USB-C Socket Ports A2478207502

€32.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A6429007401-1

Mercedes W213 350D OM642.873 Diesel Engine Unit ECU A6429007401 Automatic

€75.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A1664401606

Mercedes W166 Rear Door Wiring Harness Cable Loom Left Right N/O/S A1664401606

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A1729007313

Mercedes SLC R172 PDC Parking Sensor Module Unit ECU A1729007313

€75.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2049007408

Mercedes W204 Display Screen Information Navigation Dashboard A2049007408

€66.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2514402409

Mercedes W251 V251 Rear Door Wiring Loom Harness Cable Right O/S A2514402409

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A1695400362

Mercedes W169 W245 Parking Sensor Control Module ECU Unit A1695400362

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2469064201

Antenna Amplifier Mercedes X117 W176 W205 Rear Aerial Module A2469064201

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A0001502780

Mercedes W203 CL203 W204 M272 Petrol Ignition Coil Cable Connector A0001502780

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2124400414

Mercedes C207 W207 W212 Fuel Pump Module Diesel Control Unit ECU A2124400414

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A1779069601

Mercedes W177 W247 Fuse Box Front Relay Engine Control Unit Module A1779069601

€42.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2465401350

Fuse Box Mercedes W156 W176 W246 Front Relay Control Unit Module A2465401350

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2829003300-1

Mercedes W177 A180 282.914 136HP Petrol ECU Kit A2829003300 Key BCM Automatic

€246.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2469009615

Mercedes W176 W246 PDC Parking Control Module A2469009615

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A9065460643

Mercedes Sprinter W906 Fuse Box Relay Bracket Monunt Holder A9065460643

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2189021606

Mercedes W176 CLA C117 Dashboard Display Screen Sat Nav Multimedia A2189021606

€241.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2218707786

Mercedes W221 Seat Module Control Unit Front Left Right N/O/S A2218707786

€37.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2215401633

Mercedes W221 Door Harness Cable Loom Wire Wiring Rear Left N/S A2215401633

€42.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A1729060005

Mercedes R172 Rear SAM Fuse Relay Box A1729060005

€51.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2135452840

Mercedes W213 ECU Bracket Control Unit Module Holder Mount A2135452840

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2045455640

Mercedes Benz C E W204 W207 Control Unit Module SAM Bracket Mount A2045455640

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2218705885

Mercedes W221 Night Vision System Camera Module Control Unit A2218705885

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2198203426

Mercedes C219 Rear Door Control Module Unit Left N/S A2198203426

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A1729003406

Mercedes SLK R172 Roadster Soft Top Folding Roof Control Module A1729003406

€80.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2129003922

Mercedes W212 Fuse Box Rear SAM Relay Control Unit Module A2129003922

€42.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2125407313

Mercedes W212 Front Bumper PDC Wiring Loom Harness A2125407313

€70.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A1645403130

Mercedes W164 Positive Battery Cable Wiring A1645403130

€170.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2038204864-1

Mercedes CL203 Rear Tail Light Lamp Wiring Cable Harness Right O/S A2038204864

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A0018276804

Mercedes W207 Connection Media Interface Cable iPod Wiring Lead A0018276804

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A0009001704

Fuel Pump Module Mercedes W176 W204 C207 W212 W246 Control Unit ECU A0009001704

€80.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2218204189

Mercedes W221 Antenna Amplifier Aerial A2218204189

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2135404953

Mercedes W205 Battery Cable Electrical Wiring Harness Hybrid A2135404953

€94.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A1775408609

Door Wiring Mercedes W177 W247 Front Passenger Side Cable Harness A1775408609

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A9075407160

Mercedes W907 W910 Battery Electrical Wiring Harness Ground Line A9075407160

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2059004013

Mercedes W205 Air Conditioning Control Module A/C ECU Unit A2059004013

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2129060205

SAM Module Mercedes W207 A207 C207 Rear Control Unit ECU A2129060205

€99.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2044402607

Earth Ground Cable Mercedes W204 W207 Battery Wiring Loom Engine A2044402607

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A9105400805

Mercedes Sprinter W910 Fuel Tank Wiring Loom Cable Harness A9105400805

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A0009058912

Mercedes W205 W213 C253 Battery Cable Negative Lead Wiring Harness A0009058912

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2059007521

Module Mercedes W205 Air Conditioning A/C System Control Module A2059007521

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2055455400

Mercedes W205 Battery Power Connection Wiring Bar Rail Busbar A2055455400

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2661536779-1

Mercedes W245 M266.920 95HP Engine Control Module Kit A2661536779 Automatic

€127.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A7899061600

Mercedes W205 Converter Unit Module Control ECU DCDC48V A7899061600

€232.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2055405626-1

Mercedes C Class W205 C350e Hybrid Battery Wiring Loom A2055405626

€51.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A9069820109-1

Mercedes W907 Positive Battery Terminal Cover Cap Trim Red A9069820109

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A1175402601

Mercedes C117 Parking Sensor Wiring Rear Bumper Parktronic Loom Cable Harness

€37.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A6395432327

Mercedes Vito Viano W639 Interior Wiring Loom Harness Adapter A6395432327

€51.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A0065424220

Mercedes W164 W251 High Tone Horn Signal Right O/S A0065424220

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A1679009611

Mercedes W205 W213 X253 Door Module Rear Right O/S Control Unit ECU A1679009611

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A1685405008

Mercedes A-Class W168 Door Cable Harness Wiring Loom Front Right A1685405008

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2129001806

Mercedes A207 C207 SAM Control Unit Module Fuse Box Rear A2129001806

€142.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A0055461040

Energy Distributor Mercedes W204 W212 W906 Power Block Control Unit A0055461040

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2749060400

Mercedes W204 W212 C207 M274 OM651 Starter Motor Engine Starter A2749060400

€32.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2117320225

Mercedes W211 Cable Duct Guide Housing Rear Right O/S A2117320225

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2218202910

Mercedes W221 Dashboard Instrument Cluster Panel Switch A2218202910

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2055402237

Mercedes W205 Battery Cable Elelctrical Wiring Harness Loom Hybrid A2055402237

€113.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A1775405801

Mercedes W177 W247 Door Wiring Rear Left Right Cable Harness A1775405801

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2465410205

Mercedes W176 W246 Battery Box Trim Housing Cover Support Panel A2465410205

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2056186100

Mercedes W205 W238 Rear Battery Holder Bracket Mount Strap Clamp A2056186100

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A1669005012

Mercedes W166 Front Door Module Left N/S Control Unit ECU A1669005012

€32.95

Free delivery: Nov 12 – 13

If paid before 14:00

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