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 W177 Remote Car Key Electronic A1779059402

€94.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1638200289

Mercedes-Benz M-Class M W163 Aerial Antenna Amplifier Module Unit A1638200289

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2118703285

Mercedes W211 Door Module Rear Right O/S Control Unit ECU A2118703285

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2118704885

Mercedes W164 W211 Front Passenger Seat Memory Control Unit Module A2118704885

€32.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2218702993

Mercedes CL W216 W221 Air Module Control Unit A2218702993

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A6519009702-4

Mercedes W176 OM651.930 136HP Engine Control ECU Kit A6519009702 Manual

€189.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0005401203

Mercedes GLC 300e X253 Coupe Hybrid Electrical Battery Wire A0005401203

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2185403405

Mercedes CLS C218 Rear Door Wiring Harness Loom Left Right O/S A2185403405

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1669006307

Mercedes GLE C292 ML W166 Door Control Module Rear Left N/S A1669006307

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2135406831

Mercedes W213 Rear Door Wiring Harness Keyless Left Right N/O/S A2135406831

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1695400506

Mercedes W169 Front Bumper Parking Sensor Wiring Loom Cable Harness A1695400506

€47.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2439008400

Mercedes GLC X253 Sound Audio Amplifier Module Rear Harman A2439008400

€56.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0025428319

Mercedes W176 W204 C207 W212 C218 W246 Relay 4-Pin Black Hella 12V A0025428319

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1679008207

Telematics Module Mercedes W177 W247 Communication Control Unit ECU A1679008207

€113.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2469000005

Mercedes W176 PDC Parking Distance Control Module Unit A2469000005

€66.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2465403803-1

Mercedes W117 W156 W176 W242 W246 Electrical Fuse Relay Box A2465403803

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2056200018

Battery Box Bracket Mercedes W205 W213 W238 Trim Holder Right O/S A2056200018

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2579005100

Mercedes Sprinter W907 Telematics Services Communication Module A2579005100

€113.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0115453826

Mercedes W163 Data Connector Link Plug Wire Harness Pigtail A0115453826

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A7899823500

Mercedes EQA H243 Engine Relay 20A ECU A7899823500

€51.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0038202926

Mercedes W164 X164 W221 SRS Airbag Impact Crash Sensor A0038202926

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2168204726

Mercedes W221 Bluetooth Control Module Mobile Phone Interface A2168204726

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2055404834

Mercedes W205 GLC C253 Touch Pad Controler Wiring Harness Loom A2055404834

€47.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2129007324

Mercedes SLK R171 Petrol M271 Fuse Box SAM Relay Control Module A2129007324

€94.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2185403005-1

Mercedes CLS C218 Front Door Wiring Harness Loom Passenger Side A2185403005

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2075405205

Mercedes W207 Door Cable Wiring Loom Front Left Right Door N/O/S A2075405205

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2185403005

Mercedes CLS C218 Front Door Wiring Harness Loom Passenger Side A2185403005

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2469008516

Parking Brake Module Mercedes W176 W246 Electric Control Unit ECU A2469008516

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2208200275

Mercedes W220 Front Door Keyless Entry Antenna Right O/S Side A2208200275

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A6519007600-3

Mercedes W246 B180 CDI 651.901 109HP Engine ECU Kit A6519007600 Ignition + Key

€142.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2216890614

Mercedes W221 PDC Distance Control Holder Bracket A2216890614

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2229001306

Mercedes W910 Gearbox Module Transmission Basic Control Unit A2229001306

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2479002307

Mercedes W177 W247 4Matic Transfer Control Unit Module ECU A2479002307

€137.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2465405933

Battery Cable Mercedes W176 W246 Terminal Starter Wiring Harness A2465405933

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2049002013

W204 Mercedes Sat Nav CD Player Radio Stereo Head Unit A2049002013 W204

€99.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A6549001300-1

Mercedes W213 C238 Glow Plug Relay Diesel OM654 Preglow Module A6549001300

€32.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2711504979-1

Mercedes W204 156HP Engine Control Unit ECU KIT SET Petrol Automatic A2711504979

€560.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2465406432

Battery Cable Mercedes W176 W246 Negative Lead Wiring Harness A2465406432

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2124405833

Door Wiring Mercedes W212 Loom Cable Rear Left Right N/O/S A2124405833

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0009056001

Battery Cable Mercedes W213 S213 Negative Lead Wiring Harness A0009056001

€32.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2185402605

Mercedes CLS C218 Front Door Wiring Harness Loom Driver Side A2185402605

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0009060803

Alternator Mercedes W176 C117 X156 X117 Petrol Engine Generator A0009060803

€118.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1765400103

Battery Cable Mercedes C117 W176 Starter Alternator Wiring Harness A1765400103

€75.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1775402111

Mercedes W177 Door Harness Loom Cable Wiring Rear Left Right N/O/S A1775402111

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1768200704

Sunroof Wiring Mercedes C117 W176 Panoramic Motor Cable Harness A1768200704

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2139005628

Mercedes W205 W213 Ignition Central Lock Control Unit Module ECU A2139005628

€237.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2535407830

Mercedes C253 AMG Rear Bumper PDC Wiring Parking Sensor Loom Harness A2535407830

€37.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1718701410

Mercedes SLK R171 Alarm Anti Theft System Control Module Unit Roof A1718701410

€94.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0005405624

Fan Wiring Mercedes W639 W906 Heater Blower Unit Motor Cable Harness A0005405624

€56.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2055402750

Mercedes W205 C253 Hybrid Fuse Control Unit Module Distribution Box A2055402750

€37.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1639320314

Mercedes W163 Fuel Tank Filler Flap Cover Cap A1639320314

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2185404607

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

€23.95

Free delivery: Sep 23 – 24

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 23 – 24

If paid before 14:00

Part no. A2055400555

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

€23.95

Free delivery: Sep 23 – 24

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 23 – 24

If paid before 14:00

Part no. A2055400840

Mercedes W205 W238 Fuse Box Cover Control Unit Holder Bracket A2055400840

€23.95

Free delivery: Sep 23 – 24

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 23 – 24

If paid before 14:00

Part no. A2218211251

Mercedes W221 Dashboard Instrument Cluster Panel Button Switch A2218211251

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 4RA007813

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

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1175450000

Mercedes C117 Keyless GO Control Unit Module Mount Bracket Holder A1175450000

€28.95

Free delivery: Sep 23 – 24

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 22 – 24

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 23 – 24

If paid before 14:00

Part no. A2118702889

Mercedes W211 Radio Head Unit CD Audio Player Control Unit A2118702889

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1775405931

Mercedes W177 Engine Compartment Power Distribution Fuse Box Unit A1775405931

€99.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A6395406809

Wiring Loom Mercedes W639 Vito Cable Door Wiring Cable A6395406809

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A6549061500

Starter Mercedes W204 C238 W213 W447 Diesel OM654 Starter Motor A6549061500

€70.95

Free delivery: Sep 23 – 24

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 23 – 24

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 23 – 24

If paid before 14:00

Part no. A2129004611

Mercedes W204 Front SAM Unit Fuse Box Control Power Distribution A2129004611

€99.95

Free delivery: Sep 23 – 24

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 23 – 24

If paid before 14:00

Part no. A2475451001

Mercedes W177 Fuse Box Holder Bracket Support Mount Carrier A2475451001

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A4475402105

Mercedes Vito W447 Battery Cable Starter Alternator Wiring Harness A4475402105

€37.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2429007001

Mercedes W176 W204 W212 Telematics Communication Control Unit Module A2429007001

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2118201526

Mercedes S211 Rear Door Control Module Left N/S A2118201526

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2465402205

Mercedes W246 Front Bumper Parking Sensor Parktronic Wiring Loom A2465402205

€108.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A6261500075

Mercedes W205 Alternator Protective Cover Metal Sheet A6261500075

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1729006804

Mercedes SLK R172 Sat Nav CD Player Radio Head Unit A1729006804

€336.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1695458140

Mercedes W169 W245 Relay Control Unit Bracket Mount Holder Cover A1695458140

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2189006806

Mercedes W207 Harman Control Unit Module Amplifier Premium Sound A2189006806

€631.95

Free delivery: Sep 23 – 24

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 23 – 24

If paid before 14:00

Part no. A1718206026

Mercedes R171 Front Door Control Module Right O/S A1718206026

€137.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2049003509

Mercedes W204 S204 Radio Head Unit Sat Nav CD Player 2049003509

€47.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0009002010

Transmission Module Mercedes C117 AMG Petrol OM133 Gearbox Control A0009002010

€151.95

Free delivery: Sep 23 – 24

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 23 – 24

If paid before 14:00

Part no. A2139007105

Air Module Mercedes W213 S213 W238 SRS Control Unit ECU A2139007105

€32.95

Free delivery: Sep 23 – 24

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 23 – 24

If paid before 14:00

Part no. A1779006715

Mercedes W177 Wireless Charger Centre Console Phone Charging Module A1779006715

€99.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0005459812

Mercedes Vito W447 W213 OM654 Power Distribution Relay Unit Module A0005459812

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2215408508

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

€23.95

Free delivery: Sep 23 – 24

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 23 – 24

If paid before 14:00

Part no. A1775455100

Mercedes W177 AMG Antenna Amplifier Control Unit Module A1775455100

€32.95

Free delivery: Sep 23 – 24

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 23 – 24

If paid before 14:00

Part no. A6394401108

Mercedes Vito W639 Front Bumper PDC Wiring Parking Sensor Harness A6394401108

€61.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1725452540

Mercedes R172 Battery Holder Bracket Tray Cover Panel A1725452540

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1175403901

Mercedes C117 X117 Front Bumper Parking Sensor Wiring Loom Harness A1175403901

€70.95

Free delivery: Sep 23 – 24

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 23 – 24

If paid before 14:00

Part no. A1775406501

Mercedes W177 W247 Door Wiring Driver Side Cable Harness Loom A1775406501

€23.95

Free delivery: Sep 23 – 24

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 23 – 24

If paid before 14:00

Part no. A2465401905

Mercedes W176 W246 Rear Bumper Parking Sensor Parktronic Wiring Loom A2465401905

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

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