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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Door Module Mercedes R231 Front Door Right O/S Control Module A2319009106

€47.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2475450001

Mercedes W177 48V Additional Battery Holder Mounting Bracket A2475450001

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2319014702

Mercedes R231 Air Module Control Unit ECU SRS Module A2319014702

€284.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0009058100

Mercedes ML W166 GL X166 SL R231 C292 Crash Impact Sensor A0009058100

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2055406921

Battery Wiring Mercedes X253 Diesel OM651 Alternator Harness Cable A2055406921

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2075405105

Mercedes W204 C207 W212 Panoramic Sunroof Wiring Cable Harness A2075405105

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A6421507391-1

Mercedes W221 OM642.930 235HP Engine Control ECU Kit A6421507391 Automatic

€127.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2075406932

Mercedes A207 Boot Tailgate Wiring Loom Harness Cable A2075406932

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1698202561

Mercedes W245 Headlight Headlamp Lamp Light Wiring Front Left N/S A1698202561

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A9075409482

Fuse Box Mercedes Sprinter W907 Prefuse Box Module Relay Holder A9075409482

€47.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2124407038

Negative Cable Mercedes W212 Battery Earth Wiring Loom A2124407038

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2535402128

Mercedes X253 Starter Motor Wiring Harness Cable A2535402128

€66.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2038205185

Mercedes W203 W209 C215 Phone Control Module A2038205185

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0009050238

Windscreen Camera Mercedes W204 W212 Front Windshield Camera Unit A0009050238

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1665402102

Battery Cable Mercedes W166 C292 Starter Alternator Wiring Harness A1665402102

€47.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1765401505

Mercedes C117 W176 Interior Centre Console Cable Wiring Loom A1765401505

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2045403750

Mercedes W204 SAM Module Control Unit Electrical Fuse Box Unit A2045403750

€89.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2198201604

Mercedes C219 Seat Harness Wire Loom Electric Line Front Left N/S A2198201604

€32.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2055406304

Mercedes W205 Hybrid Battery Cable Starter Wiring Loom Harness A2055406304

€32.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2661501233

Engine Wiring Mercedes W169 W245 M266 Petrol Cable Loom Harness A2661501233

€56.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2058200704

Sunroof Wiring Mercedes W205 X253 Panoramic Roof Motor Cable Harness A2058200704

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2711502879-1

Mercedes W204 C200 M271.950 184HP Engine ECU Kit A2711502879 Ignition + Key Lock

€569.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2229001814

Door Module Mercedes W205 X253 Rear Left N/S Control Unit A1698209126

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2079011800

Mercedes W204 W207 Control Unit ECU Sensor Module Air SRS Bag A2079011800

€56.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2059006147

Mercedes W205 Front Headlight LED Control Unit Module Left N/S A2059006147

€123.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2044409734-1

Mercedes C204 Front Bumper PDC Wiring Parking Sensor Loom Harness A2044409734

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2319059900

Mercedes C253 Rear Bumper Switch Tailgate Opener Sensor Module A2319059900

€56.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2128206513

Mercedes W212 Seat Adjustment Wiring Harness Wire Front left N/S 2128206513

€56.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A6421508100-3

Mercedes V251 642.950 4-Matic 224HP Engine Control ECU A6421508100 Automatic

€279.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2219000801

Mercedes W221 Front Door Control Module Unit Left N/S A2219000801

€132.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2761508800

Starter Cover Mercedes W205 W212 W213 M276 Heat Plate Motor Shield A2761508800

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2709002100-12

Mercedes W176 M270.910 122HP Engine Control ECU Kit A2709002100 Automatic

€332.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2098209810

Mercedes CLK A209 Cabrio Alarm Anti Theft System Control Module Unit A2098209810

€32.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2465403803

Mercedes-Benz A-Class W176 Cover Equipment Electrical Fuse Box A2465403803

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2701590042

Ignition Coil Mercedes W176 M270 Petrol Ignition Cable Connector A2701590042

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2059008543

Mercedes W205 X235 BCM Body Control Unit Module ECU A2059008543

€42.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A4475406777

Alternator Wire Mercedes Vito W447 Battery Alternator Cable A4475406777

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2115400131

Mercedes C219 Battery Starter Alternator Ground Earth Cable A2115400131

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1775455800

Mercedes W177 AMG Control Unit Bracket Module Holder Mount A1775455800

€23.95

Free delivery: Sep 23 – 24

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: Sep 23 – 24

If paid before 14:00

Part no. A1665402450-1

Mercedes ML W166 Fuse Box Front Relay Control Unit Module A1665402450

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2135405542

Mercedes W205 Electrical Wire From Transmission To Body Ground Cable A2135405542

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2229002108

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

€47.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1679008311

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

€42.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0025428019

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

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0005400902

Mercedes W212 Vito W447 Adblue Injector Nozzle Wiring Harness Cable A0005400902

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0009821012

Mercedes W166 W213 C238 Power Distribution Plate Control Unit Module A0009821012

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2055400428

Battery Wiring Mercedes GLC X253 C253 Diesel OM651 Starter Cable A2055400428

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1175401805

Mercedes C117 Front Door Wiring Harness Cable Passenger Side A1175401805

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2129007024

Mercedes CLS C218 Front Fuse Relay Box On Board Supply A2129007024

€75.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0014460340

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

€32.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A6461503378

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

€289.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A6461501077-2

Mercedes Vito W639 OM646.980 116HP Engine ECU Control Set A6461501077 Manual

€450.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1698209926

Mercedes W169 W245 ECU Air Control Unit Sensor Module A1698209926

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0005468502

Battery Cover Mercedes W205 W212 Battery Positive Pole Cover Red A0005468502

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2229052705

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

€113.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1635407505

Mercedes W163 Electric Seat Adjuster Motor Wiring Harness Cable A1635407505

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1664402406

Mercedes ML W166 Front Door Wiring Harness Cable Driver Side A1664402406

€32.95

Free delivery: Sep 23 – 24

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: Sep 23 – 24

If paid before 14:00

Part no. A1718300272

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

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2124407952

Battery Cable Mercedes W212 W218 Negative Lead Terminal Harness A2124407952

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1645400850

Mercedes W164 W251 Positive Battery Cable Wiring Loom OM642 Diesel A1645400850

€28.95

Free delivery: Sep 23 – 24

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: Sep 23 – 24

If paid before 14:00

Part no. A9075402087

Mercedes W907 Starter Wiring Battery Alternator Cable Harness Loom A9075401305

€61.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2055400972

Mercedes C205 iDrive System Wiring Loom Harness Cable Unit A2055400972

€28.95

Free delivery: Sep 23 – 24

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: Sep 23 – 24

If paid before 14:00

Part no. A1175401405

Mercedes C117 Front Door Wiring Harness Cable Driver Side A1175401405

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2123300135

Mercedes W212 Front Axle Suspension Wishbone Ball Joint Mount A2123300135

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0555452928

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

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2114404705

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

€51.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2118704026

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

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1769980001

Door Wiring Plug Mercedes W176 W246 Cable Lead Connector A1769980001

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1665404802

Mercedes W166 Front Seat Headrest Wiring Cable Harness A1665404802

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1175402605

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

€23.95

Free delivery: Sep 23 – 24

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: Sep 23 – 24

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: Sep 23 – 24

If paid before 14:00

Part no. A1729007313

Mercedes SLC R172 PDC Parking Sensor Module Unit ECU A1729007313

€75.95

Free delivery: Sep 23 – 24

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: Sep 23 – 24

If paid before 14:00

Part no. A1695400362

Mercedes W169 W245 Parking Sensor Control Module ECU Unit A1695400362

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2469064201

Antenna Amplifier Mercedes X117 W176 W205 Rear Aerial Module A2469064201

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2469009413

Mercedes W176 W246 Control Unit Body Control Module ECU A2469009413

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0001502780

Mercedes W203 CL203 W204 M272 Petrol Ignition Coil Cable Connector A0001502780

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2124400414

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

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1779069601

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

€42.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2465401350

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

€28.95

Free delivery: Sep 23 – 24

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: Sep 23 – 24

If paid before 14:00

Part no. A2469009615

Mercedes W176 W246 PDC Parking Control Module A2469009615

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2115405707

Mercedes C219 Power Steering Rack Pump Wiring Harness Cable A2115405707

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A9065460643

Mercedes Sprinter W906 Fuse Box Relay Bracket Monunt Holder A9065460643

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2189021606

Mercedes W176 CLA C117 Dashboard Display Screen Sat Nav Multimedia A2189021606

€241.95

Free delivery: Sep 23 – 24

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: Sep 23 – 24

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: Sep 23 – 24

If paid before 14:00

Part no. A1729060005

Mercedes R172 Rear SAM Fuse Relay Box A1729060005

€51.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2135452840

Mercedes W213 ECU Bracket Control Unit Module Holder Mount A2135452840

€23.95

Free delivery: Sep 23 – 24

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: Sep 23 – 24

If paid before 14:00

Part no. A2218705885

Mercedes W221 Night Vision System Camera Module Control Unit A2218705885

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2198203426

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

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1729003406

Mercedes SLK R172 Roadster Soft Top Folding Roof Control Module A1729003406

€80.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2129003922

Mercedes W212 Fuse Box Rear SAM Relay Control Unit Module A2129003922

€42.95

Free delivery: Sep 23 – 24

If paid before 14:00

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