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 Sprinter W907 Module Control Unit Radar Sensor A9079001403

€123.95

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Part no. A1121510001

Mercedes W203 W211 W220 W221 Starter Motor M113 Petrol Engine A1121510001

€23.95

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Part no. A1699000200

Mercedes-Benz A B W169 W245 Front Right Door Control Unit Module A1699000200

€23.95

Free delivery: Sep 23 – 24

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Part no. A6519000603-3

Mercedes W205 C205 OM651.921 170HP Engine Control ECU Kit A6519000603 Manual

€332.95

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Part no. A2044402701

Mercedes W204 Dynamic Suspension Damper Shock Absorber Module ECU A2044402701

€28.95

Free delivery: Sep 23 – 24

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Part no. A0035421019-1

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

€23.95

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Part no. A0005463704

Mercedes C118 Positive Pole Battery Insulating Cap Cover Trim A0005463704

€23.95

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Part no. A2075402013

Door Cable Mercedes W212 Wiring Loom Front Left Right Door N/O/S A2075402013

€23.95

Free delivery: Sep 23 – 24

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Part no. A2044402232

Mercedes W204 W207 Battery Cable Positive Wiring Harness Loom A2044402232

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2135409716

Mercedes W205 W213 OM654 Alternator Starter Wiring Harness Loom A2135409716

€113.95

Free delivery: Sep 23 – 24

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Part no. A2218201259-2

Mercedes W221 Bi-Xenon Headlight Front Right O/S Cable Wire Socket A2218201259

€23.95

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Part no. A2535401401

Mercedes X253 Battery Wiring Harness Cable Tray Clamp A2535401401

€32.95

Free delivery: Sep 23 – 24

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Part no. A6401502579

Mercedes W169 200CDI OM640.941 140HP Engine Control Unit Module ECU A6401502579

€170.95

Free delivery: Sep 23 – 24

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Part no. A2035450301-1

Mercedes SLK R171 Battery Terminal Fuse Box Wiring Cable Adapter A2035450301

€37.95

Free delivery: Sep 23 – 24

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Part no. A0131540902

Mercedes ML W164 W221 W251 OM642 CDI Altenator Generator 14V 220A A0131540902

€113.95

Free delivery: Sep 23 – 24

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Part no. A2128203589

Antenna Amplifier Mercedes W212 Aerial Module Rear Roof Frame Right A2128203589

€23.95

Free delivery: Sep 23 – 24

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Part no. A2055404982

Mercedes W205 Charging Plug Socket Wiring Cable A2055404982

€70.95

Free delivery: Sep 23 – 24

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Part no. A2198203526

Mercedes CLS W219 Door Module Rear Left N/S Control Unit A2198203526

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2535400901

Starter Cable Mercedes W205 GLC X253 M274 Electrical Wiring Harness A2535400901

€47.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1664401332

Mercedes W166 Rear Bumper Parking PDC Sensor Wiring Loom Harness A1664401332

€42.95

Free delivery: Sep 23 – 24

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Part no. A2135403839

Mercedes W213 C238 Power Relay Fuse Box Unit Cover A2135403839

€56.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0015424723-1

Mercedes W204 W207 W221 Parking Sensor Display Control PDC A0015424723

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1645400762

Mercedes W164 W211 C219 Tyre Pressure Monitor Control Unit Module A1645400762

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2055404797

Battery Cable Mercedes GLC X253 Starter Motor Alternator Wiring A2055404797

€47.95

Free delivery: Sep 23 – 24

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Part no. A2118274142

Mercedes W211 Becker Audio Sound Amplifier Module A2118274142

€47.95

Free delivery: Sep 23 – 24

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Part no. A2466200028

Mercedes W176 Battery Support Holder Bracket Mount A2466200028

€23.95

Free delivery: Sep 23 – 24

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Part no. A2135400414

Mercedes W213 C238 Fuse Box Relay Control Unit Module A2135400414

€56.95

Free delivery: Sep 23 – 24

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Part no. A6429060900

Mercedes W204 W207 W212 W221 Starter Motor A6429060900

€37.95

Free delivery: Sep 23 – 24

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Part no. A6519007401-11

Mercedes W212 E250 CDI Engine Control Module ECU 170 HP SET Manual A6519007401

€170.95

Free delivery: Sep 23 – 24

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Part no. A2129005101

Fuse Box Mercedes W212 Rear SAM Relay Fuse Box Control Module A2129005101

€32.95

Free delivery: Sep 23 – 24

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Part no. N000000004325-1

Mercedes W169 W204 W211 C219 Replacement Fuse Kit Set N000000004325

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1185405713

Mercedes CLA C118 Rear Bumper PDC Wiring Parking Sensor Loom Harness A1185405713

€42.95

Free delivery: Sep 23 – 24

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Part no. A1648207789

Mercedes W164 Aerial Antenna Amplifier A1648207789

€23.95

Free delivery: Sep 23 – 24

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Part no. A2515408635

Mercedes R320 W251 Positive Plus + Battery Wiring Harness Cable A2515408635

€23.95

Free delivery: Sep 23 – 24

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Part no. A2038219751

Mercedes C-Class W203 Roof Alarm Motion Sensor Cover Trim Grey A2038219751

€23.95

Free delivery: Sep 23 – 24

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Part no. A1695403945-1

Mercedes W169 W245 Central Gateway Control Unit Module ECU A1695403945

€23.95

Free delivery: Sep 23 – 24

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Part no. A2741504704

Mercedes X253 Engine Wiring Harness Line Supply Line A2741504704

€113.95

Free delivery: Sep 23 – 24

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Part no. A2128204585

Mercedes-Benz A B W176 W246 Glove Box Aerial Antenna Booster Amplifier

€23.95

Free delivery: Sep 23 – 24

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Part no. A2055407816

Mercedes W205 2.2 Diesel Negative Earth HV Battery Cable Lead Wire A2055407816

€23.95

Free delivery: Sep 23 – 24

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Part no. A2124405933

Door Wiring Mercedes W212 Loom Cable Rear Left Right N/O/S A2124405933

€23.95

Free delivery: Sep 23 – 24

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Part no. A2124401851

Mercedes W212 Door Wiring Loom Cable Rear Left Right N/O/S A2124401851

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1775407732

Mercedes W177 Engine Starter Wiring Loom Harness 2.0 Diesel 654920 A1775407732

€47.95

Free delivery: Sep 23 – 24

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Part no. A2035401113

Mercedes C Class W203 Solenoid SOLV Valve Wiring Harness Diesel A2035401113

€37.95

Free delivery: Sep 23 – 24

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Part no. A9075402605

Mercedes W907 Fuse Box Control Unit Module Q2 A9075402605

€61.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0128206610

Mercedes W204 W207 Roof Panel Alarm Sensor Module Control Unit A0128206610

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1695450003

Mercedes W169 Fuse Box Cover Trim Panel A1695450003

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2208204942-1

Seat Adjustment Motor Mercedes W220 W221 Front Right Actuator O/S A2208204942

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2049060503-1

Mercedes W204 Rear Light Tail Lamp Plug Socket Wiring Right O/S A2115450328

€118.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2719060200

Mercedes W204 W211 W212 S212 Engine Starter Motor A2719060200

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2479000910

Mercedes W177 W247 All Wheel Drive Control Unit Module ECU SG MFA2 A2479000910

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2054406537

Mercedes C-class S205 Seat Wiring Harness Loom Wire Front Right O/S A2054406537

€51.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1725402513

Mercedes SLK R172 Rear Window Heating Cable Loom Heat Wiring Harness A1725402513

€56.95

Free delivery: Sep 23 – 24

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Part no. A2465406909

Mercedes C117 X156 W176 Door Wiring Harness Rear Left Right N/O/S A2465406909

€32.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2139005213

Mercedes W213 Door Control ECU Module Front Left N/S A2139005213

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2055456240

Mercedes C205 Rear Control Unit Module Bracket Mount Holder Support A2055456240

€23.95

Free delivery: Sep 23 – 24

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Part no. A1665450403

Mercedes W166 Junction Fuse Box Cover Housing Positive Terminal A1665450403

€28.95

Free delivery: Sep 23 – 24

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Part no. A2078202910

Seat Control Module Mercedes A207 W207 Cabrio Rear Control Unit ECU A2078202910

€28.95

Free delivery: Sep 23 – 24

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Part no. A1725400340

Mercedes R172 Battery Holder Mount Bracket Support A1725400340

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0009105202-1

Mercedes ML W164 Front Seat Lumbar Module Control Unit Pump A0009105202

€37.95

Free delivery: Sep 23 – 24

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Part no. A2661536679-2

Mercedes W169 A170 M166.940 116HP Engine Unit Module ECU A2661536679 Automatic

€56.95

Free delivery: Sep 23 – 24

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Part no. A2515400341

Mercedes W251 Negative Earth Battery Cable Wiring Harness Lead A2515400341

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A6401508334-1

Engine Control Unit Mercedes W245 B200 CDI OM640.941 140HP ECU A6401508334

€104.95

Free delivery: Sep 23 – 24

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Part no. A1729001906

Mercedes X218 CLS350 Communication Bluetooth Control Module A1729001906

€37.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2389000705

Mercedes C118 W177 W205 Bluetooth Control Module Mobile Phone ECU A2389000705

€94.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2465401205

Mercedes-Benz A B W176 W246 Left N/S Parking Brake Electrical Wiring Cable

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2709002100

Mercedes W176 W246 A180 B180 BlueEFFICIENCY 270.910 122HP Engine ECU A2709002100

€80.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0038202826

Mercedes W164 W216 W221 W251 W639 W906 Crash Sensor Impact Control A0038202826

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2049060205-5

Mercedes W204 Rear SAM Module Fuse Box Relay Control Unit A2049060205

€28.95

Free delivery: Sep 23 – 24

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Part no. A6395406609

Wiring Loom Vito Mercedes W639 Front Door Cable Left Right N/O/S A6395406609

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2055450700

Mercedes W205 W213 C253 Battery Busbar Cap Cover Trim Left N/S A2055450700

€23.95

Free delivery: Sep 23 – 24

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Part no. A2711500391-1

Mercedes W212 E200 BlueEFFICIENCY M271.860 184HP Engine ECU A2711500391

€284.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2479002216

Mercedes C118 W177 W247 W907 Bluetooth Control Unit Module ECU A2479002216

€47.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A9078209600

Mercedes W907 L2H2 Electric Radio Player Head Unit A9078209600

€218.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1725400035

Electrical Cable Mercedes R172 Transmission To Body Wiring Harness A1725400035

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2055456300

Mercedes C205 Rear Control Unit Module Bracket Mount Holder Support A2055456300

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2115451528

Mercedes W204 Cable Connector Plug Wiring Loom A2115451528

€32.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2046280218

Mercedes W204 Battery Bracket Mount Support Holder A2046280218

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0009004639

Mercedes W177 Rear Blind Spot Control Module Unit Left Right N/O/S A0009004639

€61.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0131541702

Alternator Mercedes W638 OM611 Engine Alternator Generator A0131541702

€85.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2709060500

Ignition Coil Mercedes W176 W204 C207 W212 Petrol Cable Connector A2709060500

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2208100112

Mercedes W220 Sun Visor Mount Loom Harness Wire Cable A2208100112

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2465408109

Door Wiring Mercedes W176 Loom Cable Rear Left Right N/O/S A2465408109

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2215403108

Mercedes W221 Door Wiring Front Right O/S Harness Loom Cable A2215403108

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2475402228

Mercedes W177 Recirculation Pump Wiring Loom Cable Harness A2475402228

€42.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2045400017

Mercedes W164 X164 Distronic Radar Sensor Cruise Control A2045400017

€374.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2049055902

Mercedes-Benz W204 W212 W221 Radio Remote Control Keyless Key Button A2049055902

€42.95

Free delivery: Sep 23 – 24

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Part no. A2055407112

Mercedes W205 Battery Wiring Loom Harness Cable A2055407112

€51.95

Free delivery: Sep 23 – 24

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Part no. A2515401730

Mercedes V251 Positive Battery Cable Wiring Loom Harness A2515401730

€28.95

Free delivery: Sep 23 – 24

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Part no. A2229063202-1

Fuse Box Mercedes W205 W222 Electrical Relay Box Module Unit A2229063202

€23.95

Free delivery: Sep 23 – 24

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Part no. A2124400706

Wiring Harness Mercedes W212 LED Lighting Air Nozzle Cable A2124400706

€23.95

Free delivery: Sep 23 – 24

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Part no. A2038219751-1

Mercedes-Benz C-Class W203 Alarm Sensor Module Unit A2038219751

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2189058500

Mercedes CLS X218 Antenna Amplifier Rear Aerial Control Module A2189058500

€32.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1569009100-1

Mercedes W204 C63 AMG 457HP M156.985 Engine ECU Kit Lock Barrel Keys A1569009100

€854.95

Free delivery: Sep 23 – 24

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Part no. A1729007408

Mercedes SLK R172 Player Radio Audio Navi Head Unit CD A1729007408

€218.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2669000300-2

Mercedes W169 W245 M266.920 95HP Engine Control ECU Kit A2669000300 Automatic

€237.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2479002513

Telematic Control Module Mercedes W447 W907 W910 Telematics Unit A2479002513

€113.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2048704626

Door Module Mercedes W204 Rear Right O/S Control Unit Module A2048704626

€23.95

Free delivery: Sep 23 – 24

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Part no. A2105450703

Mercedes CL203 W210 R170 Wiring Loom Harness Plug Connector A2105450703

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0009062103

Mercedes W205 Alternator Generator Petrol Engine Valeo 150A 14V A0009062103

€47.95

Free delivery: Sep 23 – 24

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