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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Seat Module Mercedes W204 W212 Control Unit Front Left Right N/O/S A1729007003

€104.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2125406250

Mercedes-Benz W212 SAM Fuse Prefuse Box Relay Control Unit A2125406250

€51.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2059006615

Mercedes W205 Windscreen Rain Sensor Front Control Unit A2059006615

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A1669063801

Mercedes ML W166 Relay Box Engine Compartment Relay Module A1669063801

€42.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A1779005509

Door Module Mercedes C118 W177 H243 Rear Left N/S Door Control A1779005509

€70.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2095451101

Fuse Box Mercedes W203 W209 Front Relay Control Unit Module SAM A2095451101

€89.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A1648205389

Mercedes ML W164 Aerial Antenna Amplifier Unit Module A1648205389

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2115457001

Mercedes C219 Fuse Box Control Unit SAM Module A2115457001

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2124405533

Mercedes W212 Wiring Loom Cable Door Front Left Right N/O/S A2124405533

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A0009051811

Mercedes W206 Negative Batery Cable Wiring Harness Minus Pole A0009051811

€42.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2054400534

Mercedes C205 Bumper PDC Wiring Loom Rear Parking Sensor A2054400534

€66.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2055407412

Mercedes W205 Alternator Ground Cable Wiring Loom A2055407412

€42.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A1775402500

Mercedes W177 W247 Battery Cable Negative Lead Terminal Harness A1775402500

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2475451000

Mercedes W177 W247 Battery Bracket Battery Mount Holder Trim A2475451000

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A1775405329

Mercedes W177 Positive Battery Cable Wiring A1775405329

€47.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2054403136

Mercedes C300h W205 Prefuse Box Cable Harness Loom Cable A2054403136

€47.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A1695403905

Mercedes-Benz A B W169 W245 Door Cable Harness Wiring Loom Rear Left Right

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2129003922-1

Mercedes W212 Fuse Box Rear SAM Relay Control Unit Module A2129003922

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2669000200

Mercedes W245 B180 266.940 Engine Control Module ECU A2669000200 Automatic

€222.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 30610-ELC-60025-AA

Mercedes W639 Wheel Steering Control Module 30610-ELC-60025-AA

€70.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2055404045

Mercedes S205 Rear Parking PDC Wiring Harness Loom A2055404045

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2709000900-9

Mercedes W176 A45 4Matic M133.980 381HP Engine Control ECU A2709000900 Automatic

€427.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2049001913

Mercedes W204 Head Unit Radio CD Player Audio Sat Nav Control A2049001913

€66.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2048703996

Mercedes W204 Multimedia Audio CD Player Radio Head Unit A2048703996

€322.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A0055461340-1

Mercedes Vito W447 Energy Distributor Plug Module A0055461340

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 9G9T14B533AC

Mercedes W204 Front Door Control Unit Module Right O/S 9G9T-14B533-AC

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A0009003500-1

Mercedes W204 W212 Fuel Pump Module Control Unit ECU AMG C63 A0009003500

€42.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A0128206610-3

Mercedes W204 W207 Roof Panel Reading Light Alarm Sensor Control A0128206610

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A1698201085

Mercedes W245 ECU Control Unit Sensor Air Module A1698201085

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A1779007716

Mercedes W177 Front Door Control Module Left Right N/O/S Unit ECU A1779007716

€61.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A1765405508

Mercedes-Benz A-Class W176 Front Door Cable Wiring Loom Harness A1765405508

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2059002011

Mercedes W205 Rear Door Control Module Unit Right O/S ECU A2059002011

€47.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A1669061202

Mercedes W221 Fuse Box Control Unit Module Relay A1669061202

€32.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2479004111

Mercedes W177 Multimedia Radio Control Module Unit ECU A2479004111

€232.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2769004901

Mercedes A238 Convertible E450 M276.823 Engine ECU Unit A2769004901 Automatic

€474.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2469005515

Mercedes W176 Rain Light Sensor Control Unit Front Windscreen Camera A2469005515

€37.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2049012604

Mercedes W204 Parking Control Unit Module ECU A2049012604

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2135409616-1

Mercedes Sprinter W910 Battery Sensor Negative Terminal Cable Wiring A2135409616

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A6429004201

Mercedes W221 BlueTec Exhaust Gas Aftertreatment Control Unit Module A6429004201

€151.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A1664408836

Mercedes W166 Dashboard Cockpit Cable Electric Wiring Harness Loom A1664408836

€42.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2055408987

Mercedes W205 Exhaust Wiring Harness Cable A2055408987

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2115458601-2

Mercedes C219 Rear SAM Module Fuse Box Relay Control Unit A2115458601

€61.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A4145401130

Mercedes Vaneo W414 Starter Wiring Harness Battery Ground Cable A4145401130

€37.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2059001611

Mercedes W205 Door Module Front Right O/S Control Unit ECU A2059001611

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2515400524

Mercedes W251 Fuse Relay Electrical Box Housing Cover A2515400524

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A1698100212

Mercedes W169 W245 Electrical Wiring Sun Visor Wiring Loom Harness A1698100212

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2059007339

Mercedes W205 BCM Body Control Module Unit ECU A2059007339

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2518202064-2

Mercedes W251 Tail Light Lamp Side Panel Harness Loom Rear Right O/S A2518202064

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2135406631

Mercedes W213 Rear Door Wiring Harness Cable Left N/S A2135406631

€32.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2469002318-2

Mercedes W176 W246 Radio Head Unit Media Player Navigation A2469002318

€327.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A1775402711

Mercedes-Benz W177 Rear Door Wiring Loom Wire Harness Left N/S A1775402711

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2465404309

Mercedes W176 W246 Passenger's Seat Wiring Loom Harness Cabling A2465404514

€32.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2465400308

Alternator Cable Mercedes W176 W246 OM651 Battery Prefuse Box A2465400308

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2518201964-2

Mercedes W251 Tail Light Lamp Side Panel Harness Loom Rear Left N/S A2518201964

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A1715400407

Mercedes R171 Door Courtesy Lamp Light Wiring Loom Harness Cable A1715400407

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2075452540

Mercedes-Benz E W207 Cabrio A207 Auxilliary Battery Bracket A2075452540

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A0008208305

Mercedes C118 Seat Inflation Occupancy Sensor A0008208305

€104.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2045409433

Mercedes W204 Front Door Wiring Loom Harness Cable Right O/S A2045409433

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2469002603-1

Mercedes W176 W246 W166 Windscreen Windshield Rain Sensor Unit A2469002603

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. N000000004325

Mercedes W169 W204 W211 C219 Replacement Fuse Kit Set N000000004325

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2049009907-2

Mercedes W204 Navigation Radio Player Head Unit Computer A2049009907

€227.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2059001513

Mercedes W205 S205 C205 Air Conditioning Control Module unit ECU A2059001513

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A1679008309

Mercedes W177 W247 Telematics Module Communication Control Unit A1679008309

€42.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2095450901

Mercedes CLK W209 Convertible Fuse Box Rear SAM Module Control Unit A2095450901

€151.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2075453840

Mercedes-Benz E W207 Cabrio A207 Exhaust BlueTec Control Unit Module Bracket

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2465400340-2

Mercedes W176 Fuse Relay Box Control Unit A2465400340 A2465400140

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A1679001520

Mercedes C118 W167 W177 W247 Ignition Control Module Unit ECU A1679001520

€80.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2219002802

Mercedes W221 Radio Control Operating Unit Card Reader CD Player A2219002802

€360.95

Free delivery: Nov 10 – 13

If paid before 14:00

Part no. A2078200075

Antenna Mercedes W212 Keyless Go Comfort Access Antenna Module Unit A2078200075

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2465450840

Mercedes GLA 250 X156 Battery Holder Bracket Support Batteries Box A2465450840

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2205401124-1

Fuse Box Unit Mercedes CL S C215 W220 1 Front Right O/S ECU A2205401124

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2208300272

Mercedes W203 C209 W211 W220 Light Solar Sun Sensor Module A2208300272

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2055403335

Mercedes W205 C253 X253 Footwell Light Wiring Cable Front Left N/S A2055403335

€66.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A1775401758

Mercedes W118 W177 W247 Starter Alternator Wiring Loom Harness Cable A1775401758

€80.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2219005300

Mercedes W221 Parktronic System Control Unit Module A2219005300

€32.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A1669001410

Mercedes ML W166 SAM Control Signal Acquisition Module ECU A1669001410

€222.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2139068701-1

Mercedes W205 W213 Fuse Box Rear SAM Module Electrical Unit A2139068701

€32.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A1698204515

Media Plug Mercedes W169 W245 Multimedia Connection Cable Wire A1698204515

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2124401251

Door Cable Mercedes W212 Wiring Loom Front Right O/S Driver Side A2124401251

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2059051106

Mercedes W205 Antenna Aerial Amplifier Module Receiver AMP Unit A2059051106

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2229003413

Mercedes W205 W222 W253 Air Conditioning A/C Module Control Unit A2229003413

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2129060005

Fuse Box Mercedes W212 Rear Relay Control Unit Electric Module SAM A2129060005

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2535400601

Mercedes X253 Starter Motor Wiring Harness Cable A2535400601

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2124401651

Door Cable Mercedes W212 Wiring Loom Front Left N/S Passenger Side A2124401651

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2074401208

Mercedes W207 Parking Sensor Wiring Loom Cable Harness Rear PDC

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2469008115

Mercedes W176 W246 Gearbox Transfer Case Control Module Unit ECU A2469008115

€42.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2124402206

Mercedes W212 E250 CDI Auxiliary Battery Cable Wiring A2124402206

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A1121510001

Mercedes W203 W211 W220 W221 Starter Motor M113 Petrol Engine A1121510001

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A1699000200

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

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2711538579

Mercedes R171 SLK 200 163HP 271.944 Kompressor Engine ECU A2711538579 Manual

€113.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A6519000603-3

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

€332.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2044402701

Mercedes W204 Dynamic Suspension Damper Shock Absorber Module ECU A2044402701

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A0035421019-1

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

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A0005463704

Mercedes C118 Positive Pole Battery Insulating Cap Cover Trim A0005463704

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2075402013

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

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2044402232

Mercedes W204 W207 Battery Cable Positive Wiring Harness Loom A2044402232

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2218201259-2

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

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2535401401

Mercedes X253 Battery Wiring Harness Cable Tray Clamp A2535401401

€32.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A6401502579

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

€170.95

Free delivery: Nov 12 – 13

If paid before 14:00

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