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 C207 Front Center Console Point Cable Wiring Loom Harness A2075402308

€56.95

Free delivery: Sep 23 – 24

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 23 – 24

If paid before 14:00

Part no. A6561593100

Mercedes W213 OM656 Diesel Engine Wiring Guide Cable Duct A6561593100

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2185409606

Mercedes C218 Parktronic Parking Sensor Wiring Cable Rear PDC A2185409606

€32.95

Free delivery: Sep 23 – 24

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 23 – 24

If paid before 14:00

Part no. A2045400010

Mercedes C207 Cable Wiring Power Steering Rack Loom Harness A2045400010

€23.95

Free delivery: Sep 23 – 24

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 23 – 24

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 23 – 24

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 23 – 24

If paid before 14:00

Part no. A1779009902

Mercedes W177 Front Windscreen Windshield Camera Multi Purpose Unit A1779009902

€66.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2045420423

Mercedes W204 PDC Parktronic Parking Sensor Display Warning Rear A2045420423

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2055451500

Power Connection Mercedes W205 W213 C238 X253 Battery Starter Alternator Wiring

€28.95

Free delivery: Sep 23 – 24

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 23 – 24

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 23 – 24

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 23 – 24

If paid before 14:00

Part no. A2055463100

Retaining Plate Mercedes W205 Relay Fuse Box Holder Bracket A2055463100

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2078201089

Mercedes W207 A207 Radio Aerial Antenna Amplifier Module Unit A2078201089

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2133402600

Mercedes W205 W213 Battery Holder Mounting Bracket Support A2133402600

€32.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2709002900

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

€379.95

Free delivery: Sep 23 – 24

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 23 – 24

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 23 – 24

If paid before 14:00

Part no. A6421508277

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

€208.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1725409010

Mercedes A207 Front Bumper Wiring Harness Cable A1725409010

€222.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0009003039

Mercedes C118 W177 W247 Starter Battery Control Module DC Converter A0009003039

€322.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0025451301

Mercedes W169 W245 W907 W910 Fuse Box Carrier A0025451301

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2465400512

Seat Wiring Mercedes C117 Front Seat Left Wiring Harness a2465400512

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0009054807-2

Mercedes W118 W177 W206 W247 NOX Sensor Electronics Module A0009054807

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1695405545

*Mercedes-Benz A-Class W169 Body Control Unit Module SAM A1695405545

€32.95

Free delivery: Sep 23 – 24

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 23 – 24

If paid before 14:00

Part no. A2229009608

Mercedes W205 BCM Body Control Module Unit ECU A2229009608

€61.95

Free delivery: Sep 23 – 24

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 23 – 24

If paid before 14:00

Part no. A1695402733

Mercedes W169 W245 Cable Loom Wiring Parking Sensors Rear A1695402733

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2059061357-4

Mercedes W205 Saloon Rear Lamp LED Wiring Cable Left N/S Tail Light A2059061357

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2469007307

Mercedes W176 R231 PDC Parking Control Module Parktronic System N62 A2469007307

€23.95

Free delivery: Sep 23 – 24

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 23 – 24

If paid before 14:00

Part no. A0009009114

Mercedes W205 Air Conditioning Climate Control Module ECU A0009009114

€28.95

Free delivery: Sep 23 – 24

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 23 – 24

If paid before 14:00

Part no. A2056105402

Mercedes W205 Battery Recess Trunk Floor Battery Box Base Plate A2056105402

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2045402610

Mercedes W204 Cable Harness Rear Door Panel Card Wiring Loom A2045402610

€23.95

Free delivery: Sep 23 – 24

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 23 – 24

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 23 – 24

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 23 – 24

If paid before 14:00

Part no. A2539059800

Mercedes W205 Lid Boot Trunk Tailgate Smart Opener Control Module A2539059800

€37.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2479006309

Mercedes C118 W177 W247 Dashboard Display Multi Screen Panel A2479006309

€113.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2205400382

Mercedes CL S Class C215 W220 Fuse Box Unit Front Right O/S Cover A2205400382

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0045454140

Mercedes ML W164 W251 Door Wiring Joint Protective Cap Bracket

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2469005010

Mercedes W176 W246 Parktronic Parking Control Unit Module ECU A2469005010

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1775403742

Mercedes W177 Interior Roof Lining Wiring Loom Harness Cable Wire A1775403742

€75.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2218201875

Mercedes W221 Aerial Antenna Control Unit Keyless Go Entry Module A2218201875

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2118210197

Mercedes E-Class W211 Rear Door Wiring Loom Harness Rubber Grommet A2118210197

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2208200475

Mercedes W220 Rear Door Keyless Entry Antenna Right O/S Side A2208200475

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1669003208

Mercedes ML W166 SAM Control Unit Rear Fuse Module A1669003208

€142.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2649001200

Mercedes W177 A35 AMG 306HP M260.920 4-Matic Engine ECU Control Unit A2649001200

€227.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2129005614-2

Mercedes A207 W212 W218 Radio Head Unit Navi CD Player Navigation A2129005614

€203.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2139002817

Mercedes W177 W205 C257 Radar Sensor Front Control Unit Module A2139002817

€189.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2059064405-2

Mercedes S205 Estate Rear Headlight Wiring Harness Cable Left N/S A2059064405

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2059007218-2

Mercedes GLC X253 Rear Trunk Lid Automatic Closing Lock Mechanism A2059007218

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0009827723

Fuse Relay Mercedes W176 W204 W246 4-Pin Unit Black Hella A0009827723

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1698207526

Mercedes-Benz A B Class W169 W245 Door Control Unit Left N/S Rear A1698207526

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0009059300

Mercedes W205 W212 W246 Parking Distance Sensor Parktronic White A0009059300

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2465402306

Mercedes W246 Centre Console Wiring Harness Loom Cable A2465402306

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2118703185

Mercedes W211 Door Module Rear Left N/S Control Unit ECU A2118703185

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0061511001

Starter Motor Mercedes W906 M272 Engine Diesel Bosch A0061511001

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1695406409

Mercedes W169 W245 Battery Earth Negative Cable Wiring Loom A1695406409

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1638900144

Mercedes W163 Spare Wheel Carrier Fixing Plate Bracket Left N/S A1638900144

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2129008007

Mercedes W204 SAM Module Fuse Box Relay Control Unit A2129008007

€80.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2208200375

Mercedes W220 Rear Door Keyless Entry Antenna Left N/S Side A2208200475

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2229001908

Mercedes W205 Door Control Module Unit ECU Front Right O/S A2229001908

€37.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1699007400

Parking Sensor Mercedes W169 W245 PDC Distance Control Unit Module A1699007400

€75.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0009009400

Mercedes A207 Automatic Gearbox Transmission Control Module ECU A0009009400

€284.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2095404010

Mercedes A209 Front Door Cable Wiring Loom Harness Left N/S A2095404010

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2229001712

Door Module Mercedes W205 X253 Front Door Right O/S Control Module A2229001512

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0025450601

Mercedes W906 Fuse Relay Box Module Control Unit A0025450601

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2059008143

Mercedes W205 Front Telephone Wireless Charging Load Wattage Module A2059008143

€56.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2139005220

Mercedes W213 SAM Module Rear Body Comfort Control Unit ECU A2139005220

€32.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2129061803-2

Mercedes S212 Rear Tail Light Lamp Outer Wiring Harness Right O/S A2129061803

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2229001708

Mercedes W205 Door Control Module Front Left N/S A2229001708

€32.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A9109053300

Mercedes Sprinter W910 Battery Sensor Negative Terminal Cable A9109053300

€42.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2229001512

Mercedes W205 X253 Door Module Front Door Left N/S Control Module A2229001512

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2721530392

Mercedes CL203 Engine Control ECU Kit M272.920 204HP A2721530392 Automatic

€237.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2049005015

Mercedes C204 W207 Suspension Damper Adjustment Control Unit Module A2049005015

€189.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1729006609-2

Mercedes SLK R172 Radio CD Player Sat Nav Comand Head Unit A1729006609

€151.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2218101817-1

Mercedes W221 Headlining Interior Mirror Rear Left Right N/O/S A2218101817

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2055401542

Mercedes W205 Rear Door Harness Wiring Cable Left Right N/O/S A2055401542

€61.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2469000616

COMAND Head Unit Mercedes CLA C117 W176 W246 Nav Sat Radio Player A2469000616

€61.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2479003808

Suspension Module Mercedes C118 W177 W247 Control Unit ECU A2479003808

€123.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A4475402231

Mercedes W447 Sliding Door Wiring Loom Harness Right O/S A4475402231

€32.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2229002308

Mercedes W205 S205 W222 Door Control Module ECU Rear Right O/S A2229002308

€47.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1638200456

Mercedes W16 Spare Wheel Carrier Additional Brake Light Stop Lamp A1638200456

€94.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A6461532591-2

Mercedes W639 111 CDI OM646 109HP Engine Unit Module ECU Kit A6461532591 Manual

€664.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2035409213

Mercedes W203 Door Wiring Harness Front Left Right N/O/S Wiring Loom A2035409213

€27.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0131548102

Mercedes W203 Alternator Generator 120A 14V Bosch 2.6 Petrol A0131548102

€37.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1775404107

Mercedes C118 W177 W247 Fuse Box Battery Relay Terminal A1775404107

€70.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2129061703-2

Mercedes S212 Rear Tail Light Lamp Wiring Harness Outer Left N/S A2129061703

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A4475406453

Battery Cable Mercedes Vito W447 Diesel OM651 Alternator Wiring A4475406453

€37.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2218705093

Mercedes W221 Door Control Module Unit ECU Rear Left Right N/O/S A2218705093

€56.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2198200226

Door Module Mercedes C219 Rear Door Left N/S Control Module A2198200226

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2215408809

Mercedes W221 Door Harness Wiring Loom Rear Left N/S A2215408809

€32.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A4474404705

Engine Wiring Mercedes Vito W447 OM651 Engine Harness Cable A4474404705

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

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