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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Power Relay Control Mercedes W176 W246 Module 4 Pin 12V 20A SET A0035423019

€23.95

Free delivery: Sep 15 – 16

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 15 – 16

If paid before 14:00

Part no. A2124407952

Battery Cable Mercedes W212 W218 Negative Lead Terminal Harness A2124407952

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A1645400850

Mercedes W164 W251 Positive Battery Cable Wiring Loom OM642 Diesel A1645400850

€28.95

Free delivery: Sep 15 – 16

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 15 – 16

If paid before 14:00

Part no. A9075402087

Mercedes W907 Starter Wiring Battery Alternator Cable Harness Loom A9075401305

€61.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2055400972

Mercedes C205 iDrive System Wiring Loom Harness Cable Unit A2055400972

€28.95

Free delivery: Sep 15 – 16

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 15 – 16

If paid before 14:00

Part no. A1175401405

Mercedes C117 Front Door Wiring Harness Cable Driver Side A1175401405

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2123300135

Mercedes W212 Front Axle Suspension Wishbone Ball Joint Mount A2123300135

€23.95

Free delivery: Sep 15 – 16

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 15 – 16

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 15 – 16

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 15 – 16

If paid before 14:00

Part no. A1769980001

Door Wiring Plug Mercedes W176 W246 Cable Lead Connector A1769980001

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A1665404802

Mercedes W166 Front Seat Headrest Wiring Cable Harness A1665404802

€23.95

Free delivery: Sep 15 – 16

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 15 – 16

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 15 – 16

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 15 – 16

If paid before 14:00

Part no. A1729007313

Mercedes SLC R172 PDC Parking Sensor Module Unit ECU A1729007313

€75.95

Free delivery: Sep 15 – 16

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 15 – 16

If paid before 14:00

Part no. A1695400362

Mercedes W169 W245 Parking Sensor Control Module ECU Unit A1695400362

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2469064201

Antenna Amplifier Mercedes X117 W176 W205 Rear Aerial Module A2469064201

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2469009413

Mercedes W176 W246 Control Unit Body Control Module ECU A2469009413

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A0001502780

Mercedes W203 CL203 W204 M272 Petrol Ignition Coil Cable Connector A0001502780

€23.95

Free delivery: Sep 15 – 16

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 15 – 16

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 15 – 16

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 15 – 16

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 15 – 16

If paid before 14:00

Part no. A2469009615

Mercedes W176 W246 PDC Parking Control Module A2469009615

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2115405707

Mercedes C219 Power Steering Rack Pump Wiring Harness Cable A2115405707

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A9065460643

Mercedes Sprinter W906 Fuse Box Relay Bracket Monunt Holder A9065460643

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2189021606

Mercedes W176 CLA C117 Dashboard Display Screen Sat Nav Multimedia A2189021606

€241.95

Free delivery: Sep 15 – 16

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 15 – 16

If paid before 14:00

Part no. A1729060005

Mercedes R172 Rear SAM Fuse Relay Box A1729060005

€51.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2135452840

Mercedes W213 ECU Bracket Control Unit Module Holder Mount A2135452840

€23.95

Free delivery: Sep 15 – 16

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 15 – 16

If paid before 14:00

Part no. A2218705885

Mercedes W221 Night Vision System Camera Module Control Unit A2218705885

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2198203426

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

€28.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A1729003406

Mercedes SLK R172 Roadster Soft Top Folding Roof Control Module A1729003406

€80.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2129003922

Mercedes W212 Fuse Box Rear SAM Relay Control Unit Module A2129003922

€42.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2125407313

Mercedes W212 Front Bumper PDC Wiring Loom Harness A2125407313

€70.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A1645403130

Mercedes W164 Positive Battery Cable Wiring A1645403130

€170.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2038204864-1

Mercedes CL203 Rear Tail Light Lamp Wiring Cable Harness Right O/S A2038204864

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A0018276804

Mercedes W207 Connection Media Interface Cable iPod Wiring Lead A0018276804

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A0009001704

Fuel Pump Module Mercedes W176 W204 C207 W212 W246 Control Unit ECU A0009001704

€80.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2218204189

Mercedes W221 Antenna Amplifier Aerial A2218204189

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2135404953

Mercedes W205 Battery Cable Electrical Wiring Harness Hybrid A2135404953

€94.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A1775408609

Door Wiring Mercedes W177 W247 Front Passenger Side Cable Harness A1775408609

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A9075407160

Mercedes W907 W910 Battery Electrical Wiring Harness Ground Line A9075407160

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2059004013

Mercedes W205 Air Conditioning Control Module A/C ECU Unit A2059004013

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2129060205

SAM Module Mercedes W207 A207 C207 Rear Control Unit ECU A2129060205

€99.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2044402607

Earth Ground Cable Mercedes W204 W207 Battery Wiring Loom Engine A2044402607

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A9105400805

Mercedes Sprinter W910 Fuel Tank Wiring Loom Cable Harness A9105400805

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A1669059302-2

Mercedes W166 Rear View Reversing Camera Trunk Lid Tailgate A1669059302

€142.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2059007521

Module Mercedes W205 Air Conditioning A/C System Control Module A2059007521

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2055455400

Mercedes W205 Battery Power Connection Wiring Bar Rail Busbar A2055455400

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2661536779-1

Mercedes W245 M266.920 95HP Engine Control Module Kit A2661536779 Automatic

€127.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A7899061600

Mercedes W205 Converter Unit Module Control ECU DCDC48V A7899061600

€232.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2055405626-1

Mercedes C Class W205 C350e Hybrid Battery Wiring Loom A2055405626

€51.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A9069820109-1

Mercedes W907 Positive Battery Terminal Cover Cap Trim Red A9069820109

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A1669003602

Mercedes W204 R172 DAB Receiver Digital Audio Control Unit Module A1669003602

€89.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A1175402601

Mercedes C117 Parking Sensor Wiring Rear Bumper Parktronic Loom Cable Harness

€37.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A0065424220

Mercedes W164 W251 High Tone Horn Signal Right O/S A0065424220

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A1679009611

Mercedes W205 W213 X253 Door Module Rear Right O/S Control Unit ECU A1679009611

€28.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A1685405008

Mercedes A-Class W168 Door Cable Harness Wiring Loom Front Right A1685405008

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2129001806

Mercedes A207 C207 SAM Control Unit Module Fuse Box Rear A2129001806

€142.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A0055461040

Energy Distributor Mercedes W204 W212 W906 Power Block Control Unit A0055461040

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2749060400

Mercedes W204 W212 C207 M274 OM651 Starter Motor Engine Starter A2749060400

€32.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2065406045

Mercedes W206 Rear Door Harness Cable Wiring Loom Left N/S A2065404116

€42.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2117320225

Mercedes W211 Cable Duct Guide Housing Rear Right O/S A2117320225

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2218202910

Mercedes W221 Dashboard Instrument Cluster Panel Switch A2218202910

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A1648200297

Mercedes GL X164 Tailgate Boot Rear View Camera A1648200297

€94.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2055402237

Mercedes W205 Battery Cable Elelctrical Wiring Harness Loom Hybrid A2055402237

€113.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A1775405801

Mercedes W177 W247 Door Wiring Rear Left Right Cable Harness A1775405801

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2465410205

Mercedes W176 W246 Battery Box Trim Housing Cover Support Panel A2465410205

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2056186100

Mercedes W205 W238 Rear Battery Holder Bracket Mount Strap Clamp A2056186100

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A1669005012

Mercedes W166 Front Door Module Left N/S Control Unit ECU A1669005012

€32.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A1688300072

Mercedes-Benz A-Class W168 Intake Temperature Sensor A1688300072

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2205404508

Mercedes W220 Door Wiring Harness Rear Left N/S Cable A2205404508

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A1669001814

Mercedes W166 SAM Body Control Unit Module Fuse Box A1669001814

€47.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A1725408605

Mercedes SLK R172 Sun Visor Wiring Harness Cable Loom A1725408605

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2215407710

Mercedes W221 Battery Negative Terminal Cable Wiring Wire A2215407710

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2215408045

TPM Module Mercedes W221 S500 C216 Tire Pressure System Module RDK A2215408045

€28.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A1694710141

Mercedes W169 W245 Fuel Pump Cable Harness Bracket Mount Trim A1694710141

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A6397600340

Mercedes Vito W639 Door Handle Cable Catch Bowden Cable Rear A6397600340

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A0993200058

Mercedes W205 C219 W222 Valve Block Air Suspension Control Module A0993200058

€51.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A1648207726

Door Module Mercedes ML W164 Front Left N/S Control Unit Module A1648207726

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2055402224

Mercedes S205 X253 Center Console Wiring Loom Electrical Harness A2055402224

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A1698208626

Mercedes-Benz A B W169 W245 Door Control Module Right Rear O/S A1698208626

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2044400638

Mercedes C204 Wiring Cable Harness Front Passenger Door Wiring Loom A2044400638

€28.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2711500391-9

Mercedes R172 BlueEFFICIENCY 271.861 184HP Engine ECU Kit A2711500391 Key + Lock

€398.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2188201926

Mercedes CLS C218 Bi-Xenon Headlight Ballast Module Control Unit A2188201926

€89.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2059000828

Door Module Mercedes GLC X253 Rear Door Left Control Module A2059000828

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A1645400624

Mercedes W164 Fuse Box Relay Housing Cover A1645400624

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A6401500434-1

Mercedes W169 A160 CDI OM640.942 82HP Engine Unit ECU Kit A6401500434 Automatic

€227.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2044400538

Mercedes C204 Wiring Cable Harness Front Driver Door Wiring Loom A2044400538

€32.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A1679006912

Mercedes C118 W177 W247 Keyless Go Module ECU Entry Control Unit A1679006912

€28.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2049005908-3

Mercedes W204 COMAND Navigation CD Player Radio Sat Nav Head Unit A2049005908

€132.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A1729006008

Mercedes W204 W212 W176 Media Interface Control Unit Module A1729006008

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

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