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 CLS W218 Rear Door Harness Loom Wiring Left Right N/O/S A2185404607

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2055409240

Mercedes W205 Front Door Electric Wiring Harness Loom Cable Left N/S A2055409240

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2055400555

Mercedes W205 Door Electrical Wiring Harness Front Left N/S A2055400555

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2711504879-2

Mercedes W204 C180 271.952 156HP Engine Control Unit ECU A2711504879 Manual

€341.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2055400840

Mercedes W205 W238 Fuse Box Cover Control Unit Holder Bracket A2055400840

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2048702126

Mercedes W204 Door Module Control Unit Module Front Right O/S A2048702126

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2218211251

Mercedes W221 Dashboard Instrument Cluster Panel Button Switch A2218211251

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 4RA007813

Relay Mercedes W204 4-Pin Electrical Relay Black Hella 12V 4RA007813

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A1175450000

Mercedes C117 Keyless GO Control Unit Module Mount Bracket Holder A1175450000

€28.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2059064003-2

Mercedes W205 Front Headlamp Headlight LED Wiring Cable Right O/S A2059064003

€23.95

Free delivery: Sep 11 – 15

If paid before 14:00

Part no. A6429002900-4

Mercedes W204 C350 CDI OM642.830 Engine Module ECU Kit A6429002900 Key Lock

€503.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2118702889

Mercedes W211 Radio Head Unit CD Audio Player Control Unit A2118702889

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A1775405931

Mercedes W177 Engine Compartment Power Distribution Fuse Box Unit A1775405931

€99.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A6395406809

Wiring Loom Mercedes W639 Vito Cable Door Wiring Cable A6395406809

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A6549061500

Starter Mercedes W204 C238 W213 W447 Diesel OM654 Starter Motor A6549061500

€70.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2055407942

Mercedes W205 Front Door Harness Wiring Cable Left Right N/O/S A2055407942

€32.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2205404808

Mercedes W220 Window Lifter Door Cable Harness Passenger Side N/S A2205404808

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. CPLA-14D455-AF

Range Rover L405 Blind Spot Radar Sensor Module Control Unit CPLA-14D455-AF

€142.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2475451001

Mercedes W177 Fuse Box Holder Bracket Support Mount Carrier A2475451001

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A4475402105

Mercedes Vito W447 Battery Cable Starter Alternator Wiring Harness A4475402105

€37.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2429007001

Mercedes W176 W204 W212 Telematics Communication Control Unit Module A2429007001

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2118201526

Mercedes S211 Rear Door Control Module Left N/S A2118201526

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2465402205

Mercedes W246 Front Bumper Parking Sensor Parktronic Wiring Loom A2465402205

€108.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A6261500075

Mercedes W205 Alternator Protective Cover Metal Sheet A6261500075

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A1729006804

Mercedes SLK R172 Sat Nav CD Player Radio Head Unit A1729006804

€336.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A1695458140

Mercedes W169 W245 Relay Control Unit Bracket Mount Holder Cover A1695458140

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2189006806

Mercedes W207 Harman Control Unit Module Amplifier Premium Sound A2189006806

€631.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A9064407409

VW Crafter 2E Mercedes Sprinter W906 Earth Ground Cable Wiring Loom A9064407409

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A1718206026

Mercedes R171 Front Door Control Module Right O/S A1718206026

€137.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2049003509

Mercedes W204 S204 Radio Head Unit Sat Nav CD Player 2049003509

€47.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A0009002010

Transmission Module Mercedes C117 AMG Petrol OM133 Gearbox Control A0009002010

€151.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A1649100075-1

Mercedes ML W164 Lumbar Module Front Seat Lumbar Control Unit A1649100075

€56.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2139007105

Air Module Mercedes W213 S213 W238 SRS Control Unit ECU A2139007105

€32.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2055408040

Mercedes W205 Front Door Electric Wiring Harness Loom Cable Left N/S A2055408040

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A1779006715

Mercedes W177 Wireless Charger Centre Console Phone Charging Module A1779006715

€99.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A0005459812

Mercedes Vito W447 W213 OM654 Power Distribution Relay Unit Module A0005459812

€28.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2215408508

Mercedes W221 Door Harness Wiring Loom Rear Left N/S A2215408508

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A0035420419

Mercedes W177 W205 W247 Relay Fuse Unit Module 4 Pins Black A0035420419

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A1775455100

Mercedes W177 AMG Antenna Amplifier Control Unit Module A1775455100

€32.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A1775408027

Mercedes C118 W177 W247 M282 Battery 48V Wiring Harness Cable Loom A1775408027

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A6394401108

Mercedes Vito W639 Front Bumper PDC Wiring Parking Sensor Harness A6394401108

€75.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A1725452540

Mercedes R172 Battery Holder Bracket Tray Cover Panel A1725452540

€28.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A1175403901

Mercedes C117 X117 Front Bumper Parking Sensor Wiring Loom Harness A1175403901

€70.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2721536091

Mercedes R171 SLK 350 M272.963 272HP Engine Control ECU Starter Kit A2721536091

€365.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A1775406501

Mercedes W177 W247 Door Wiring Driver Side Cable Harness Loom A1775406501

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2711534691-4

Mercedes R171 SLK200 271.944 163HP Engine Control ECU Kit A2711534691 Automatic

€170.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2465401905

Mercedes W176 W246 Rear Bumper Parking Sensor Parktronic Wiring Loom A2465401905

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A0009051910

Battery Cable Mercedes W177 W247 Negative Lead Terminal Harness A0009051910

€37.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A1639200210

Mercedes W163 Rear Bench Shock Absorber Strut A1639200210

€32.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2115452601

Mercedes ML W164 Prefuse Fuse Distribution Box Front A2115452601

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A1669051702

Mercedes-Benz A C M W166 W176 W205 Aerial Antenna Amplifier Unit A1669051702

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A6549007900-1

Mercedes W205 C300de OM654.920 306HP Engine Unit ECU Kit A6549007900 Automatic

€560.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A1645400750

Mercedes ML W164 Battery Fuse Box Power Distribution A1645400750

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2719000700

Mercedes R171 SLK200 Kompressor M271.954 Engine Control Unit ECU A2719000700

€180.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A1331500120

Mercedes C117 W176 Temperature Sensor Adapter Wiring Harness Loom A1331500120

€32.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A6429002900-5

Mercedes C207 C350 CDI BE OM642.836 Engine Control ECU Kit A6429002900 Automatic

€379.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A1569057900

Mercedes W176 Aerial Antenna Amplifier A1569057900

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A6421505526-1

Mercedes C219 CLS 320 CDI 224HP OM642.920 Engine ECU Kit A6421505526 Automatic

€132.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A6549003200-2

Mercedes W213 E220d OM654 194HP Engine Control ECU Kit A6549003200 Automatic

€208.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2098209610

Mercedes CLK W209 Convertible Alarm Anti Theft System Control Unit A2098209610

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A9078280000

Mercedes W906 W907 Radio Antenna Rod Roof Antenna A9078280000

€28.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2059007615

Module Mercedes W205 Air Conditioning Control Module A2059007615

€28.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2514401909

Mercedes W164 W251 Wiring Loom Cable Harness Door Front Left Right A2514401909

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A1185402504

Mercedes C118 Door Harness Rear Left N/S Door Wiring Loom A1185402504

€37.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A6394405009

Wiring Loom Mercedes W639 Vito Cable Door Wiring Cable A6394405009

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2048208526

Mercedes W204 Parking Sensor Parktronic Display Control A2048208526

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2469007314-1

Mercedes CLA C117 Central Display Screen Multimedia Sat Nav Unit A2469007314

€66.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2129005401

Mercedes W207 Fuse Junction Box Relay Control Unit Module SAM A2129005401

€51.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A6461509777-2

Mercedes C209 Engine Control ECU 2.1 Diesel 150 HP A6461509777 Automatic KIT

€142.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A0009008718

Climate Control Module Mercedes W205 W213 Air Conditioning A/C Unit A0009008718

€28.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A0495453128

Steering Lock Cable Mercedes W169 W204 Connector Plug Wiring Loom A0495453128

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A1725403405

Mercedes R172 OM651 Diesel Alternator Wiring Harness Cable Loom A1725403405

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2129060005-1

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

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A1715400406

Mercedes SLK R171 Window Lifter Lift Mechanism Cable Wiring Harness A1715400406

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2129004901

Fuse Box Mercedes W212 Rear SAM Relay Control Unit Module A2129004901

€28.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A6519004500

Mercedes W205 Engine Control ECU Unit 204HP Diesel Automatic Gearbox A6519004500

€42.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A1669003903

Mercedes GLE W166 GLS X166 Air Module Unit Control ECU SRS A1669003903

€113.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2036901430

Mercedes C CLC Class CL203 W203 Rear SAM Unit Fuse Box Trim Cover A2036901430

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2469004313

Gearbox Module Mercedes W176 Automatic Transmission Unit ECU A2469004313

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2465452840

Mercedes-Benz A B W176 W246 Control Module Housing Bracket Mount A2465452840

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2188205061-1

Mercedes C218 Front Headlight Wiring Harness Cable Right O/S A2188205061

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2118705726

Air Module Mercedes W211 C219 Air System Control Unit ECU A2118705726

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2125406250-1

Mercedes W212 SAM Fuse Prefuse Box Relay Junction Control Unit A2125406250

€51.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2513200158

Mercedes W251 W906 Valve Block Air Suspension Control Unit Module A2513200158

€56.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2198203626

Mercedes CLS W219 Door Module Rear Right O/S Control Unit A2198203626

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A1645460461

Mercedes ML W164 Cable Duct Wiring Guide Bracket Trim Right O/S A1645460461

€28.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A1679005218

Mercedes W167 W177 Radio Stereo Nav Navigation Head Unit High A1679005218

€450.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2075451740

Mercedes-Benz A207 W207 Cabrio Control Unit Module Bracket Holder A2075451740

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2059009230

Air Conditioning Module Mercedes W205 C253 A/C Control Unit ECU A2059009230

€23.95

Free delivery: Sep 14 – 15

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Part no. A2115455232

Mercedes W211 Front Fuse Box SAM SRB Module Relay Control Unit A2115455232

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A1669052102

Mercedes W166 Battery Cable Wire Negative Minus Battery Sensor A1669052102

€66.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A1635409108

Mercedes-Benz M ML W163 Rear Window Heater Cable Harness Wiring A1635409108

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A1131533479

Mercedes W163 W211 W220 Engine Control Unit ECU 279HP S430 Automatic A1131533479

€180.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A1779061302

Mercedes EQA H243 W247 Fuse Box Relay Control Unit Module A1779061302

€80.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2465403505

Door Wiring Mercedes W176 W246 Front Passenger Side Cable Harness A2465403505

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2055406621

Starter Cable Mercedes W205 GLC X253 Electrical Wiring Harness A2055406621

€28.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2218702086

Mercedes W221 Rear Seat Control Module Unit ECU A2218702086

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2055408709

Mercedes W205 Door Wiring Harness Loom Cable Front Driver's Side A2055408709

€47.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A0061519801

Mercedes W204 W212 W251 Starter Motor 642872 Diesel Engine Starter A0061519801

€56.95

Free delivery: Sep 14 – 15

If paid before 14:00

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