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 W177 Head Unit Media Player Audio Radio Controller A1679004209

€189.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A6549001400-1

Mercedes W213 E220 CDI 654.920 194HP Engine ECU Kit A6549001400 Automatic

€455.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0075420418

Yaw Module Mercedes W204 Rotation Rate Acceleration Sensor A0075420418

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2045420323

PDC Display Mercedes W204 Front Parking Sensor Screen Control Unit A2045420323

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2055403742

Mercedes W205 Front Driver's Door Wiring Harness Cable A2055403742

€94.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2115455332

Mercedes C219 SAM Module Comfort Control Unit A2115455332

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2218207510

Mercedes W221 Anti Theft Roof Alarm Ultrasonic Motion Sensor Unit A2218207510

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2309050639

Mercedes X164 W221 Ignition Key Remote Control Unit Fob A2309050639

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2465409611

Mercedes-Benz A B Class W176 W246 Battery Surround Trim Box Bracket A2465409611

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1775408340

Mercedes W177 W247 Electrical Wiring Harness Left Right N/O/S A1775408340

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A6229000700

Mercedes W447 Bosch Glow Plug Relay Controller Unit Control Module A6229000700

€75.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2128202289

Mercedes W212 Aerial Antenna Module Amplifier Rear Window Top Left A2128202289

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2465405733

Wiring Harness Mercedes X156 W176 Petrol Battery To Starter Cable A2465405733

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1648200564-2

Mercedes GL X164 Rear Lamp Side Panel Light Plug Socket Left N/S A1648200564

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2045461080

Mercedes W204 W212 Rear Door Wiring Loom Harness Left N/S A2045461080

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2229002112

Door Module Mercedes W205 GLC C253 Control Unit Rear Right O/S A2229002112

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2059002922

Door Module Mercedes W205 W253 C253 Front Left N/S Control Unit ECU A2059002922

€32.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2475451101

Mercedes C118 W177 C247 Fuse Box Module Cover Cap Trim Housing M282 A2475451101

€32.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0005400564

Mercedes W205 Negative Cable Battery Lead Minus Pole Wiring A0005400564

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2139065706-1

Fuse Box Mercedes W205 W213 Front Engine Compatment Relay Module A2139065706

€51.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2135400329

Mercedes X253 Electrical Wiring Harness Cable Hybrid A2135400329

€89.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A6541592501

Mercedes W213 OM654 Engine Wiring Cable Cover Duct Bracket Channel A6541592225

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2514404213

Mercedes V251 Front Bumper PDC Wiring Harness A2514404213

€75.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2469068100-2

Mercedes W246 Rear Lamp Tail Light Side Panel LED Wiring Left N/S A2469068100

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2218210197

Mercedes W221 Cover Wiring Cable Front Door Protection Seal Sleeve A2218210197

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1568200089

Mercedes W176 W246 Tailgate Aerial Antenna Amplifier Unit A1568200089

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2135401217

Mercedes W213 OM642 Diesel Engine Alternator Wiring Loom Harness A2135401217

€47.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2465403005

Mercedes W176 W245 Front Right Door Wiring Loom Harness A2465403005

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0009828323

Mercedes W176 W246 Power Relay Control Module 5 Pin 12V A0009828323

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1698201185

Mercedes W169 W245 Front Door Control Unit Module Left N/S A1698201185

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A6269010000-1

Mercedes W205 C200d 626.951 136HP Engine Unit ECU Kit A6269000000 Automatic

€427.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A6541592200

Mercedes X253 Engine Wiring Cable Cover Duct Bracket Channel OM654 A6541592200

€42.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2118700026

Bluetooth Module Mercedes W203 W211 W219 Control Unit Hands Free A2118700026

€32.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A6079002000

Mercedes W176 A180 CDI 607.951 109HP Engine Control Unit ECU A6079002000 Manual

€94.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1698207526-1

Mercedes W169 W245 Door Control Unit Left N/S Rear A1698207526

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1697220180

Mercedes-Benz A-Class W169 Door Plug Cover Trim Insert Blank Seal A1697220180

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0009001705

Mercedes C117 PDC Parking Sensor Control Module Unit ECU A0009001705

€61.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1698201285

Mercedes W169 W245 Front Door Control Unit Module Right O/S A1698201285

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2465400213

Mercedes W242 W246 Multifunction Camera Wiring Loom Harness Cable A2465400213

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2229008811

Mercedes W205 C300h Heater Control Module Unit ECU A2229008811

€51.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2133401800

Mercedes W205 W213 High Voltage Battery Holder Mount Bracket Support A2133401800

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2059003222

Door Module Mercedes W205 W253 Control Unit Module Front Right O/S A2059003222

€37.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2055459500

Mercedes C205 Audio Amplifier Module Bracket Mount Holder Support A2055459500

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0025428919-1

Mercedes W176 W246 Relay 5-Pin Yellow Hella 12V SET X2 A0025428919

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2045407435

Earth Ground Cable Mercedes W204 C207 W212 Line Strap Battery Lead A2045407435

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A4479060400

Mercedes W447 Fuse Relay Box Module Control Unit A4479060400

€61.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2133401900

Mercedes W205 W213 High Voltage Battery Holder Mount Bracket Support A2133401900

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1729060105

Mercedes SLK R172 Rear Fuse Box SAM Relay Control Unit Module A1729060105

€89.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2054404136

Mercedes W205 Battery Lead Wiring Loom Cable Hybrid Cable Harness A2054404136

€47.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2134400200

Mercedes GLC 300e X253 Electric Drive Ground Earth Line Wire A2134400200

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2125420018-BLA

Mercedes W169 W204 W212 Parking Sensor PDC Front Black A2125420018

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1765405905

Mercedes W176 Center Console Wiring Loom Electrical Harness A1765405905

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2129010700

Mercedes W212 ECU Control Unit Sensor Module Airbag A2129010700

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0009051816

Mercedes C118 W167 W177 W206 C247 Front Windscreen Camera Assist A0009051816

€70.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1569007402

Mercedes W176 W246 Body Control Module Unit Fuse Box BCM ECU A1569007402

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2119820302

Mercedes W211 C219 Prefuse Fuse Distribution Box Electric Unit Front A2119820302

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1729056500

Mercedes-Benz A B Class W176 W246 Aerial Antenna Cable A1729056500

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1779004215

Mercedes C118 W177 Radio Stereo Satellite Navigation Head Unit A1779004215

€336.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0035421019

Relay Mercedes C117 GLA X156 ML W166 W176 W246 5 Pins Yellow A0035421019

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1648220230

Mercedes W164 W212 Alarm Sensor Warning Buzzer Module Unit A1648220230

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A6398201689

Mercedes Vito W639 Sound Audio Amplifier Control Unit Module A6398201689

€284.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0005400664

Mercedes W205 Battery Cable Wiring Harness Loom Petrol Hybrid A0005400664

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2229001206

Mercedes W205 C300h Drivetrain Control Module Hybrid A2229001206

€89.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1725405004

Mercedes SLK R172 Wiring Harness Cable Adapter Connector A1725405004

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2188200187

Mercedes W221 Multimedia Interface USB Adapter Port Socket A2188200187

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2215402350-1

Mercedes W221 W216 Fuse Box Junction Control Unit Relay Module A2215402350

€28.95

Free delivery: Sep 22 – 24

If paid before 14:00

Part no. A2049057501

Mercedes W204 W212 Dashboard Light Sun Solar Sensor Unit A2049057501

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0009827403

Mercedes W205 Energy Distributor Power Electrical Control Unit A0009827403

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0009828223

Mercedes W213 Power Relay 4 Pin 12V Hella A0009828223

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A6401503434-1

Mercedes W169 A160 CDI OM640.942 82HP Engine ECU Kit A640150363 Automatic

€237.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2059067200-1

Mercedes W205 S205 W213 Fuse Box Front Relay Control Unit Module A2059067200

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2119060700-1

Mercedes CLS W219 Head Unit CD Player Navigation Radio Audio Unit A2119060700

€379.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1131531091

Mercedes CLS500 C219 5.0 306HP M113.967 Engine ECU Kit A1131538679 Automatic

€313.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A6519007401-10

Mercedes A207 E250CDI Blue Efficiency 651911 204HP Engine Module ECU A6519007401

€89.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2649000700-6

Mercedes W177 A250 264960 264.960 224HP Engine ECU Module A2649000700 Automatic

€237.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1175401605

Mercedes C117 Door Wiring Harness Control Module Front Left N/S A1175401605

€37.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2044401705

Mercedes S204 Door Wiring Loom Cable Rear Left Right N/O/S A2044401705

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2749062100

Starter Motor Mercedes W213 C238 C253 Engine A2749062100

€37.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2059060104-2

Mercedes W205 Front Headlight Headlamp Wiring Harness Cable Left N/S A2059060104

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A6519007401-2

Mercedes W204 C250CDI Blue Efficiency OM651.911 204HP Engine ECU A6519007401 Key

€189.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2711534591

Mercedes W203 C180 Kompressor M271 Engine Module ECU A2711534591 Automatic

€47.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2188701489

Mercedes W218 Audio Amplifier Harman Kardon Subwoofer Control Unit A2188701489

€56.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2129060017

Mercedes W212 Hybrid Engine Bay Fuse Relay Box Housing A2129060017

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0009008709

Mercedes W213 Tyre Pressure Control Module Unit A0009008709

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1669005612

Door Module Mercedes ML W166 Rear Right O/S Door Control Unit A1669005612

€66.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2038202286

Mercedes-Benz C-Class W203 CD Player Audio Stereo Radio Head Unit A2038202286

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1769052400-1

Mercedes W176 Pressure Crash Impact Sensor Control Module A1769052400

€37.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1765406602-1

Mercedes W176 Front Bumper Electrical Wiring Harness Parktronic A1765406602

€56.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2218707385

Mercedes W221 Rear DVD Entertainment System Video Player Unit A2218707385

€370.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2761509875

Mercedes W213 W222 A238 M276 Starter Screening Plate Shield A2761509875

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2049060405

Mercedes W204 Front Fuse Board Box Relay Unit Case A2049060405

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2711535679

Mercedes S203 Engine Control Unit ECU 1.8 Petrol 163 HP A2711535679 Automatic

€66.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2059065105-2

Mercedes S205 Estate Rear Lamp Inner Wiring Harness Cable RIght O/S A2059065105

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 2049060205-1

Mercedes C-Class C204 Rear SAM Fuse Box Relay Control Module 2049060205

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2139003920

Mercedes W213 C238 Stereo Radio Player Sat Nav GPS Control Unit A2139003920

€123.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0009059101

Mercedes-Benz E-Class W207 W212 ESP Yaw Rotation Rate Sensor A0009059101

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2535400701-1

Mercedes A238 M276 Engine Alternator Wiring Loom Cable Harness A2535400701

€37.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2055409231

Mercedes C205 Front Door Wiring Harness Loom Cable Driver Side A2055409231

€32.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0009007126

Air Conditioning Module Mercedes W205 W213 C253 A/C Control Unit ECU A0009007126

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

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