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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SAM Module Mercedes W204 Control Unit Electrical Fuse Box Unit A2049060305

€108.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A0009063701

Mercedes W205 Alternator 14V/200A Valeo Diesel Engine M626 A0009063701

€161.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2128203542

Tailgate Module Mercedes W204 W212 Boot Lid Locking ECU Control Unit A2128203542

€56.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A0131549002

Alternator Generator Mercedes W204 W211 OM646 Diesel Bosch 180A A0131549002

€66.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2038202185

Mercedes W203 Door Control Module Rear Left N/S A2038202185

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A4479009808

Mercedes Vito W447 Fuse Box Relay Control Unit Electric Module SAM 4479009808

€237.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A6461502734-1

Mercedes W204 C220 CDI 170HP 646.811 Engine Unit ECU A6461502734 Automatic

€142.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A1669003309

Mercedes W176 W204 W246 Headlight Headlamp Range Control Unit Module A1669003309

€42.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2219009903

Mercedes-Benz S-Class W221 Rear Door N/O/S Control Unit Module A2219009903

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2125400035

Earth Ground Cable Mercedes W204 W207 W212 Battery Starter Wiring A2125400035

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2469052403

Mercedes W156 W176 Battery Cable Negative Lead Terminal Harness A2469052403

€32.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2389053301

Tailgate Trunk Mercedes X117 X156 W205 Boot Rear Control Module Unit A2389053301

€37.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A1779061002

Fuse Box Mercedes W177 Power Distribution Junction Relay Unit A1779061002

€42.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A1715450032

Mercedes SLK R171 PDC Parking Distance Control Unit Module Sensor A1715450032

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2229001408

Module Mercedes S205 Trunk Rear Tuner Digital Radio DAB Control Unit A2229001408

€32.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A9062700060

Mercedes Sprinter W906 Mechatronic Automatic Gearbox Control Unit A9062700060

€522.95

Free delivery: Aug 7 – 11

If paid before 14:00

Part no. A2075401550

Mercedes W204 Battery Fuse Box Positive Distribution Terminal A2075401550

€32.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A6519062400

Starter Motor Mercedes W204 W212 OM651 Diesel Engine Bosch Starter A6519062400

€32.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A1669004302

Mercedes W176 W246 Front Door Module Control Unit Module Right O/S A1669004302

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A0009003310

Mercedes W205 W213 Fuel Pump Module Control Unit ECU A0009003310

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A1698201585

Mercedes W245 ECU Control Unit Sensor Air Module A1698201585

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A1645403132

Mercedes-Benz M-Class ML W164 Wiring Loom Cable Harness Fuel Tank A1645403132

€32.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A1638201675

Mercedes-Benz M-Class ML W163 Roof Antenna A1638201675

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2055404106

Brake Harness Mercedes W205 Rear Left Brake Pad Wear Wire Wiring A2055404106

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2711501920

Engine Wiring Mercedes W204 C207 W212 M271 Harness Loom Cable A2711501920

€132.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2025402373

Mercedes W169 W203 W204 W211 OBD Diagnostic Plug Cover A2025402373

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A9067601204

Mercedes Sprinter W906 Front Left Door N/S Handle Bowden Pull Cable A9067601204

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A1698206726

Mercedes-Benz W245 ECU Control Unit Sensor Module Airbag A1698206726

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A0009006612

Rear Module Mercedes C205 W205 Fuel Pump Control Unit A0009006612

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2025405981-1

Mercedes W164 W204 C207 W212 W221 W906 Wiring Cable Plug OBD Socket A2025405981

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A9065400341

Battery Cable Mercedes Sprinter W906 Negative Lead Wiring Harness A9065400341

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A1775401629

Mercedes W177 Rear Bumper PDC Wiring Loom Parking Sensor A1775401629

€37.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2466200018

Mercedes-Benz A-Class W176 Battery Frame Holder Bracket Mount Plate A2466200018

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2059006923

Air Conditioning Module Mercedes C205 X253 A/C Control Unit ECU A2059006923

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2129000004

SAM Module Mercedes W212 Fuse Box Relay Control Unit A2129000004

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2129004502

Mercedes W204 W207 Front Right Door Control Unit Module A2129004502

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A0015424423

Parktronic Screen Mercedes W207 W212 Front Parking Sensor Display A0015424423

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2059006337

Safety Module Mercedes S205 Airbag Belt Tensioner Control Module SRS A2059006337

€189.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A0009007009

Mercedes Vito W447 Diesel Adblue Module Control Unit ECU A0009007009

€66.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2048982614

Battery Cover Mercedes W204 W207 Trim Lid Panel A2048982614

€32.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A6519003403-3

Mercedes Sprinter W906 OM651.955 163HP Engine Unit Module ECU A6519003403 Manual

€227.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A1665402350

Fuse Box Mercedes GLE W166 C292 W463 Relay Control Unit Module A1665402350

€32.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2049060205-1

Mercedes C204 Rear SAM Module Fuse Box Relay Control Unit A2049060205

€37.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2129007104

Mercedes W212 SAM Module Control Unit Electrical Fuse Box Unit A2129007104

€170.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2059007037

Mercedes W205 W213 Fuse Box Rear SAM Module Electrical Fuse Unit A2059007037

€66.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2139068701

Mercedes W205 W213 Fuse Box Rear SAM Module Electrical Fuse Unit A2139068701

€56.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A9079002407

Mercedes W907 Electronic Ignition Module Control Unit A9079002407

€161.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A9075406749

Mercedes W907 Battery Electrical Ground Line Wire Earth Cable A9075406749

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A0025421319-4

Mercedes W204 Genuine Universal Car Relay 4-Pin Tyco X4 Black A0025421319

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2129001529

Mercedes-Benz C E Class W204 W207 W212 Front Left Door N/S Control Unit Module

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A0051517401

Starter Motor Mercedes W169 W245 Diesel Engine A0051517401

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A0009820112

Mercedes W177 W207 Power Energy Distribution Unit Module A0009820112

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A0009821923-1

Mercedes W205 Interior Trunk Fuse Box Automotive Pink Relays Set A0009821923

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A0009001017

Mercedes S205 W205 Air Conditioning Control Module A/C ECU Unit A0009001017

€33.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2189000104

Mercedes CLS X218 Parktronic PDC Parking Assist Control Module A2189000104

€32.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A1729000302

Mercedes R172 PDC Parking Distance Sensor Control Module Unit A1729000302

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 0390203255

Seat Adjustment Motor Mercedes W221 Front Seat Motor Actuator 0390203255

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A0038201926

Mercedes W221 Door Crash Impact Sensor Rear Left Right N/O/S A0038201926

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2475400600

Mercedes W177 Rear Axle Wheel RPM Speed Right Sensor Wire Harness A2475400600

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A1779001304

Door Module Mercedes C118 W177 W247 Front Left N/S Control Unit A1779001304

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. B67875846-1

Mercedes W203 Bluetooth Hands Free Mobile Phone Adapter Bracket Holder B67875846

€37.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2049006003

Radio Player Mercedes W204 Audio 20 Navi CD Player Head Unit A2049006003

€218.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A1729060205-1

Mercedes SLK R172 Rear SAM Fuse Relay Box Control Unit Module A1729060205

€89.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A0028201326

Mercedes SLK R171 Crash Sensor Air Bag Impact Module Control Unit A0028201326

€113.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2078201989

Mercedes-Benz W207 A207 Radio Aerial Antenna Amplifier Module Unit A2078201989

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A1669008009

Mercedes GLE W166 Rear Door Wiring Control Module Right O/S Unit ECU A1669008009

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2469003114

Transmission Module Mercedes W176 W246 Control Unit ECU A2469003114

€42.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2465400508

Battery Cable Mercedes C117 W176 W246 Alternator Wiring Harness A2465400508

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A0009008004

Parking Module Mercedes W207 W212 PDC Distance Control Unit ECU A0009008004

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2218201811-2

Mercedes W221 Bluetooth Hands Free Mobile Phone Adapter Connector A2218201811

€56.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2711541402-1

Alternator Generator Mercedes W203 W204 M271 Engine Valeo 120A 14V A2711541402

€85.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2035450803-1

Mercedes CL203 W203 Battery Terminal Fuse Box Control Unit Module A2035450803

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2054402834

Mercedes W205 Parking Sensor Wiring Rear Bumper PDC Loom Cable A2054402834

€56.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A6519007500-4

Mercedes W204 C250 CDI BlueEFFICIENCY OM651.911 Engine ECU A6519007500 Automatic

€108.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A1776204201

Mercedes C118 W177 W247 Battery Box Trim Housing Cover Support A1776204201

€37.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2044401005

Mercedes-Benz C W204 Rear Left N/O/S Right Door Wiring Loom Harness A2045407609

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2195404505

Mercedes C219 Coupe Front Bumper Parking Sensor PDC Wiring Harness A2195404505

€94.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2229000016

Entry Module Mercedes C253 W205 W213 C238 Keyless Go Control Unit A2229000016

€56.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2118705390

Mercedes ML W164 SLK R171 W211 C219 CD Changer 6 Disc Player Unit A2118705390

€47.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2229003210

Mercedes W205 Head Unit Audio Player Radio Sat Nav Module A2229003210

€37.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A1179001801

Mercedes W176 Air Module System Control Unit Module ECU A1179001801

€85.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A1679004712

Bluetooth Module Mercedes W205 W213 W222 W238 Control Unit ECU A1679004712

€37.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2057200522

Mercedes GLC X253 Front Door Trim Cover Panel Strip Left N/S Black A2057200522

€66.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2229003308

Mercedes W222 W205 S205 Keyless Entry Control Module ECU A2229003308

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2079003700

Mercedes C207 Door Module Rear Left N/S Control Unit ECU A2079003700

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A9069006503

Door Module Mercedes W906 Front Left Right N/O/S Control Unit ECU A9069006503

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2469008510

Body Control Module Mercedes W117 W176 W242 W246 Fuse Box Sam A2469008510

€33.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A0009009213

Mercedes W447 Fuel Pump Control Module A0009009213

€85.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2649060400

Mercedes W205 W257 Starter Engine Motor A2649060400

€113.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A0009820912

Mercedes W176 W222 W246 Voltage Converter Power Distributor Fuse A0009820912

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2129004206

Door Module Mercedes W212 E-Class Rear Right O/S Control Unit A2129004206

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2118705026

Passenger Seat Module Mercedes W164 W203 W211 Memory Control Unit A2118705026

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2049060205

Mercedes W204 Rear SAM Module Fuse Box Relay Control Unit A2049060205

€37.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A0994644206

Mercedes X253 Steering Wheel Contact Switch Control Plate A0994644206

€32.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2115457301

Mercedes C219 Front Fuse Box SAM Relay Control Module A2115457301

€51.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2469003417

Parking Brake Module Mercedes W176 W231 W246 Electric Control Unit A2469003417

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A6429002700

Mercedes W203 W204 W212 OM642 Glow Plug Relay Unit Control Module A6429002700

€47.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2049001206

Mercedes W204 Coupe Door Module Front Left N/S Control Unit A2049001206

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2079052800

Mercedes-Benz E-Class W207 Cabrio A207 Anti Theft Alarm Module Control Unit ECU

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

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