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 C205 Audio Amplifier Module Bracket Mount Holder Support A2055459500

€23.95

Free delivery: Sep 14 – 15

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 14 – 15

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 14 – 15

If paid before 14:00

Part no. A4479060400

Mercedes W447 Fuse Relay Box Module Control Unit A4479060400

€61.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2133401900

Mercedes W205 W213 High Voltage Battery Holder Mount Bracket Support A2133401900

€28.95

Free delivery: Sep 14 – 15

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 14 – 15

If paid before 14:00

Part no. A2054404136

Mercedes W205 Battery Lead Wiring Loom Cable Hybrid Cable Harness A2054404136

€47.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2134400200

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

€28.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2125420018-BLA

Mercedes W169 W204 W212 Parking Sensor PDC Front Black A2125420018

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A1765405905

Mercedes W176 Center Console Wiring Loom Electrical Harness A1765405905

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2129010700

Mercedes W212 ECU Control Unit Sensor Module Airbag A2129010700

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A0009051816

Mercedes C118 W167 W177 W206 C247 Front Windscreen Camera Assist A0009051816

€70.95

Free delivery: Sep 14 – 15

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 14 – 15

If paid before 14:00

Part no. A2119820302

Mercedes W211 C219 Prefuse Fuse Distribution Box Electric Unit Front A2119820302

€32.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A1729056500

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

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A1779004215

Mercedes C118 W177 Radio Stereo Satellite Navigation Head Unit A1779004215

€336.95

Free delivery: Sep 14 – 15

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 14 – 15

If paid before 14:00

Part no. A1648220230

Mercedes W164 W212 Alarm Sensor Warning Buzzer Module Unit A1648220230

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A6398201689

Mercedes Vito W639 Sound Audio Amplifier Control Unit Module A6398201689

€284.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A0005400664

Mercedes W205 Battery Cable Wiring Harness Loom Petrol Hybrid A0005400664

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2229001206

Mercedes W205 C300h Drivetrain Control Module Hybrid A2229001206

€89.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A1725405004

Mercedes SLK R172 Wiring Harness Cable Adapter Connector A1725405004

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2188200187

Mercedes W221 Multimedia Interface USB Adapter Port Socket A2188200187

€28.95

Free delivery: Sep 14 – 15

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 11 – 15

If paid before 14:00

Part no. A2049057501

Mercedes W204 W212 Dashboard Light Sun Solar Sensor Unit A2049057501

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A0009827403

Mercedes W205 Energy Distributor Power Electrical Control Unit A0009827403

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A6401540502-1

Mercedes W169 W245 A B 160 180 200 CDI OM640 Alternator Generator A6401540502

€85.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A0009828223

Mercedes W213 Power Relay 4 Pin 12V Hella A0009828223

€23.95

Free delivery: Sep 14 – 15

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 14 – 15

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 14 – 15

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 14 – 15

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 14 – 15

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 14 – 15

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 14 – 15

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 14 – 15

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 14 – 15

If paid before 14:00

Part no. A2749062100

Starter Motor Mercedes W213 C238 C253 Engine A2749062100

€37.95

Free delivery: Sep 14 – 15

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 14 – 15

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 14 – 15

If paid before 14:00

Part no. A2711534591

Mercedes W203 C180 Kompressor M271 Engine Module ECU A2711534591 Automatic

€47.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2188701489

Mercedes W218 Audio Amplifier Harman Kardon Subwoofer Control Unit A2188701489

€56.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A0009008709

Mercedes W213 Tyre Pressure Control Module Unit A0009008709

€28.95

Free delivery: Sep 14 – 15

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 14 – 15

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 14 – 15

If paid before 14:00

Part no. A1769052400-1

Mercedes W176 Pressure Crash Impact Sensor Control Module A1769052400

€37.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2218707385

Mercedes W221 Rear DVD Entertainment System Video Player Unit A2218707385

€370.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2761509875

Mercedes W213 W222 A238 M276 Starter Screening Plate Shield A2761509875

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2049060405

Mercedes W204 Front Fuse Board Box Relay Unit Case A2049060405

€23.95

Free delivery: Sep 14 – 15

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 14 – 15

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 14 – 15

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 14 – 15

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 14 – 15

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 14 – 15

If paid before 14:00

Part no. A2535400701-1

Mercedes A238 M276 Engine Alternator Wiring Loom Cable Harness A2535400701

€37.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2055409231

Mercedes C205 Front Door Wiring Harness Loom Cable Driver Side A2055409231

€32.95

Free delivery: Sep 14 – 15

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 14 – 15

If paid before 14:00

Part no. A2075402308

Mercedes C207 Front Center Console Point Cable Wiring Loom Harness A2075402308

€56.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2475457300

Mercedes W177 Fuse Box Relay Cover Lid Control Unit Bracket Trim A2475457300

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A6561593100

Mercedes W213 OM656 Diesel Engine Wiring Guide Cable Duct A6561593100

€28.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2215401205

Mercedes W221 Front Bumper PDC Wiring Parking Sensor Loom Harness A2215401205

€32.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2185409606

Mercedes C218 Parktronic Parking Sensor Wiring Cable Rear PDC A2185409606

€32.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2219050018

Mercedes-Benz S-Class W221 Headlining Alarm Sensor Module Cover Trim A2219050018

€28.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2045400010

Mercedes C207 Cable Wiring Power Steering Rack Loom Harness A2045400010

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2055400182

Mercedes W205 W213 C238 C253 Relay Fuse Box Top Cover Lid Cap A2055400182

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A9075409682

Mercedes Sprinter W907 W910 Fuse Box Relay Box Fuse Box Module A9075409682

€85.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2108208726

Mercedes-Benz W210 S210 Alarm Anti Theft System Control Module Unit A2108208726

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A1779009902

Mercedes W177 Front Windscreen Windshield Camera Multi Purpose Unit A1779009902

€66.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2045420423

Mercedes W204 PDC Parktronic Parking Sensor Display Warning Rear A2045420423

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2055451500

Power Connection Mercedes W205 W213 C238 X253 Battery Starter Alternator Wiring

€28.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A6421501230-2

Mercedes C219 Engine Control ECU 272HP Diesel CLS 350 Automatic A6421501230 KIT

€165.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2059067200

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

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A6519007401-12

Mercedes W204 Engine Control ECU 2.1 Diesel 170HP Manual 651911 A6519007401 Kit

€170.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2055463100

Retaining Plate Mercedes W205 Relay Fuse Box Holder Bracket A2055463100

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2078201089

Mercedes W207 A207 Radio Aerial Antenna Amplifier Module Unit A2078201089

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2133402600

Mercedes W205 W213 Battery Holder Mounting Bracket Support A2133402600

€32.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2709002900

Mercedes X156 GLA200 M270.910 156HP Engine Control ECU A2709002900 Automatic

€379.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A6519009702-7

Mercedes W176 A220d OM651.930 177HP Engine ECU Kit A6519009702 2 Keys Automatic

€284.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2188203015

Mercedes CLS C218 USB Socket 12V Power Outlet Wiring Harness Cable A2188203015

€32.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A6421508277

Mercedes CLS C219 OM642.920 Engine Control ECU Kit A6421508277 Automatic

€208.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A1725409010

Mercedes A207 Front Bumper Wiring Harness Cable A1725409010

€222.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A0009003039

Mercedes C118 W177 W247 Starter Battery Control Module DC Converter A0009003039

€322.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A0025451301

Mercedes W169 W245 W907 W910 Fuse Box Carrier A0025451301

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2465400512

Seat Wiring Mercedes C117 Front Seat Left Wiring Harness a2465400512

€28.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A0009054807-2

Mercedes W118 W177 W206 W247 NOX Sensor Electronics Module A0009054807

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2139005311

Mercedes W213 Head Unit CD Media Player Audio Auto Radio Controller A2139005311

€170.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2229009608

Mercedes W205 BCM Body Control Module Unit ECU A2229009608

€61.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2749000800-7

Mercedes W205 C200 274.920 184HP Engine Control ECU Kit A2749000800 Automatic

€303.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A1695402733

Mercedes W169 W245 Cable Loom Wiring Parking Sensors Rear A1695402733

€28.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2469007307

Mercedes W176 R231 PDC Parking Control Module Parktronic System N62 A2469007307

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A1775402610

Mercedes W177 Fuel Tank Fuel Pump Wiring Loom Harness 282814 Petrol A1775402610

€37.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A0009009114

Mercedes W205 Air Conditioning Climate Control Module ECU A0009009114

€28.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2465406809

Mercedes W176 W246 Wiring Loom Cable Door Rear Left Right N/O/S A2465406809

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2056105402

Mercedes W205 Battery Recess Trunk Floor Battery Box Base Plate A2056105402

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2045402610

Mercedes W204 Cable Harness Rear Door Panel Card Wiring Loom A2045402610

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A0009059300-CVB1

Mercedes W205 W212 W246 Parking Distance Sensor Set x2 Cavansite Blue - 890

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2059064505-2

Mercedes S205 Estate Rear Headlight Wiring Harness Cable Right O/S A2059064505

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2118702926

Mercedes W211 C219 Front Windscreen Rain And Light Sensor Rain-Light A2118702926

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2539059800

Mercedes W205 Lid Boot Trunk Tailgate Smart Opener Control Module A2539059800

€37.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2479006309

Mercedes C118 W177 W247 Dashboard Display Multi Screen Panel A2479006309

€113.95

Free delivery: Sep 14 – 15

If paid before 14:00

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