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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Relay Mercedes W176 W246 4-Pin Black Hella 12V A0025428419

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2038201385

Door Module Mercedes CL203 W203 Front Left N/S Control Unit A2038201385

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2048205189

Mercedes-Benz C-Class W204 Aerial Antenna Amplifier Unit A2048205189

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2479002613

Mercedes CLA C118 W177 W205 W213 Telematics Control Unit Module A2479002613

€80.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2055401492

Mercedes W205 Door Wiring Harness Door Control Loom Front Left N/S A2055401492

€104.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0061514501-2

Starter Motor Mercedes W204 W212 Sprinter W906 OM651 Diesel Engine A0061514501

€66.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A6421500326

Mercedes W204 OM642 224HP Engine Control ECU A6421500326 Automatic

€165.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1725401209

Mercedes R172 Teleaid Monitoring Sensors Wiring Harness Cable Loom A1725401209

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2465408111

Mercedes W246 Door Wiring Loom Cable Front Right A2465408111

€32.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A4144460116

Mercedes W414 Central Locking Lock Alarm Control Module ECU A4144460116

€47.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2055404767

Mercedes C205 Front Door Harness Wiring Loom Driver's Side A2055404767

€37.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2125400072

Mercedes W212 Fuse Box Housing Relay Unit Module A2125400072

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2118705526

Mercedes W219 Motorola Telephone Control Module DC UHI MOST A2118705526

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2139004009

Mercedes W213 Door Module Front Left N/S Control Unit A2139004009

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2055400292

Mercedes W205 Door Wiring Harness Door Control Loom Front Right O/S A2055400292

€66.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2218208202

Mercedes W221 Front Centre Dashboard Tweeter Speaker A2218208202

€33.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2215408401

Mercedes W221 Air Suspension Control Unit Module A2215408401

€37.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A6395400044

Mercedes Vito W639 Anti Theft Alarm Switch Loom Cable A6395400044

€32.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A6549009600-3

Mercedes GLC 220d X253 654.920 194HP 4Matic Engine Control Unit A6549009600

€189.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2135409616

Mercedes Sprinter W910 Battery Sensor Negative Terminal Cable Wiring A2135409616

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1725404105

Mercedes R172 Rain Sensor Wiring Harness Cable Loom A1725404105

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2469008113

Mercedes GLE X156 4Matic Transfer Control Unit Module ECU A2469008113

€61.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2118701585-1

Rain Sensor Mercedes W211 W219 Windscreen Control Unit Module A2118701585

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1669001709

Mercedes ML W166 SRS System Air Module Control Unit ECU A1669001709

€42.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2218207389

Mercedes W221 Seat Headrest Display Monitor Rear Entertainment Unit A2218207389

€218.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1775406401

Mercedes W177 Door Wiring Loom Harness Cable Front Right O/S A1775406401

€37.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2515401830

Mercedes W251 Starter Motor Alternator Wiring Harness Cable Loom A2515401830

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2661538979-2

Mercedes W169 B150 M266.920 95HP Engine Control ECU A2661538979 Manual

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1175450800

Negative Battery Terminal Mercedes C117 W176 W246 Lead Connector A1175450800

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A6291501779

ECU Mercedes X164 Diesel OM629.912 Engine Control Module 306 HP Automatic

€104.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2125406905

Mercedes W212 Door Wire Wiring Loom Front Left N/S A2125406905

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A4475411200

Mercedes Vito W447 Battery Support Holder Bracket Mount Tray A4475411200

€32.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2198200764-2

Mercedes CLS C219 Rear Lamp Tail Light Wiring Cable Left N/S A2198200764

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2709002100-15

Mercedes C117 CLA 180 270.910 122HP Engine ECU Kit A2709002100 Automatic

€503.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0035453501

Mercedes Vaneo W414 Sprinter W901 W902 W903 Fuse Box Battery A0035453501

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2125406805

Mercedes W212 Door Wiring Cable Front Right O/S A2125406805

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2048204326

Mercedes W204 Interior Roof Cabin Light Panel Sensor Control Unit A2048204326

€94.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1729004004

Mercedes W204 Display Screen Multifunction Navigation Dashboard A1729004004

€66.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A6421508900-12

Mercedes V251 Engine Control ECU 3.0 CDI 265HP R350 A6421508900 KIT Automatic

€379.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2053401800

Mercedes W205 Pipe Line Piping Side Battery A2053401800

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2049005503

Mercedes C207 Complete Damper Adjustment Control Module ECU A2049005503

€70.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1679009011

Mercedes W205 C213 X253 Rear Door Control Module Unit ECU Left N/S A1679009011

€42.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1728200526

Mercedes R172 SLK Air Module SRS Control Unit ECU A1728200526

€80.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2046190048

Mercedes-Benz C W204 Rear Battery Support Holder Mount Bracket A2046190048

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1569005100

Mercedes C204 C63 AMG Engine ECU 156.985 487HP Key Lock Set Auto A1569005100

€854.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A4159007503

Mercedes Citan W415 Body Control Module Unit BCM ECU A4159007503 284B18276R

€237.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2049004406

Mercedes W204 Radio Stereo CD Player Head Unit A2049004406

€108.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2125406105

Mercedes W212 Rear LED Wiring Cable Harness Loom A2125406105

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A6519007500-18

Mercedes W212 E220 CDI 651.924 170HP Engine Unit ECU Kit A6519007500 Automatic

€313.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2128270128-IRS

Roof Antenna Mercedes W212 Shark Trim Panel Iridium Silver - 775 A2128270128

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2038301613

Mercedes C CLK Class W203 C209 Engine Bay Fuse Box Right O/S Cover A2038301613

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2229004619

Mercedes W205 W213 C238 Bluetooth Hermes LTE Control Unit Module A2139002210

€113.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2385452700

Mercedes C238 Rear Control Unit Module Bracket Holder Trim Panel A2385452700

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2045402710

Mercedes W204 Wiring Loom Cable Door Rear Left Right N/O/S A2045402710

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2469009212

Mercedes X117 Tailgate Boot Control Rear Module Unit A2469009212

€80.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2125406505

Mercedes W212 Door Wire Wiring Loom Front Right O/S A2125406505

€37.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1645451840

Mercedes W164 ECU Control Unit Bracket Holder A1645451840

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2059007437

Sam Module Mercedes S205 Relay Fuse Box Rear Control Module In Trunk A2059007437

€99.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2075406233

Mercedes A207 Front Seat Wiring Harness Cable Left Right N/O/S A2075406233

€56.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2059001811

Mercedes W205 Rear Door Control Module Unit Left N/S ECU A2059001811

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2055401900

Mercedes W205 Parking Sensor Wiring Rear Bumper PDC Loom Cable A2055401900

€47.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2429004101

Mercedes W204 W212 Telephone Control Unit Module ECU A2429004101

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A6421507100

Mercedes W164 ML350 OM642 4-Matic 224HP Engine Control ECU A6421507100 Automatic

€146.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2059007539

Fuse Box Mercedes S205 Interior Front Relay Fuse Box Sam Module A2059007539

€108.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2711508033

Mercedes W204 Engine Wiring Harness Cable Loom A2711508033

€313.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2055409995

Mercedes C205 Pressure Sensor Wiring Loom A2055409995

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A6401504034-1

Mercedes W245 B200 OM640.941 140HP Engine Control ECU Kit A6401504034 Automatic

€189.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2048200089

Mercedes-Benz C E Class W204 W207 Aerial Antenna Amplifier Unit A2048200089

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0009069905

Mercedes W205 W213 Engine Alternator Generator M264 Petrol A0009067703

€161.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2079002800

Mercedes W207 Convertible Door Module Front Right O/S Control Unit A2079002800

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2215408507

Mercedes W221 Door Wiring Harness Cable Front Left Right N/O/S A2215408507

€32.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2465404300

Mercedes W176 Door Harness Loom Cable Wiring Rear Right A2465404300

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1664401709

Mercedes W166 Centre Console Wiring Electric Harness Loom Wire A1664401709

€37.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0009058000

Windscreen Camera Mercedes W207 W221 Front Windshield Module Unit A0009058000

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2465400140

Mercedes-Benz A-Class W176 Equipment Electrical Cover Fuse Box A2465400140

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A6397601804

Mercedes Vito W639 Door Handle Bowden Cable Catch Rear Wire A6397601804

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2219001201

Mercedes W221 Door Control Module Unit Rear Left Right N/O/S A2219001201

€42.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2479002908

Mercedes W205 W213 Camera Module Front Windscreen Windshield Unit A2479002908

€113.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1729007103

Mercedes R172 SLK Roof Control Module ECU A1729007103

€213.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0048273745

iPod Interface Mercedes W204 W207 W212 Module Control Unit ECU A0048273745

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2038700426

Door Module Mercedes CL203 Front Right O/S Control Unit A2038700426

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2215408609

Mercedes W221 Rear Door Wiring Harness Cable Left N/S A2215408609

€32.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2215450801

Mercedes W221 Fuse Box Control Unit SAM Module Relay A2215450801

€227.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2711535391-2

Mercedes R171 SLK 200K 184HP M271.944 Engine ECU Kit A2711535391 Key Lock

€275.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A9079001605

Mercedes W907 Central Gateway Control Unit Module Relay ECU A9079001605

€465.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0005456786

Mercedes W205 W213 Fuse Box Protective Bracket Cover A0005456786

€23.95

Free delivery: Sep 22 – 24

If paid before 14:00

Part no. A1178200661-1

Mercedes C117 Front Headlight Light Lamp Harness Cable Right O/S A1178200661

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1688200289

Mercedes W168 Antenna Amplifier Unit Roof Rear Rail A1688200289

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0465456628

Mercedes W203 W204 W218 Front Seat Wiring Loom Plug Connector A0465456628

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2044400938

Mercedes C204 Electric Wire Harness Loom Cable Connector A2044400938

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0015456403

Mercedes Sprinter W906 Fuse Box Relay Cover Box Cap A0015456403

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0025451201

Mercedes W169 W245 W906 Fuse Box Carrier A0025451201

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2215408908

Mercedes W221 Door Harness Wiring Loom Rear Right O/S A2215408908

€32.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1698702210

Mercedes-Benz A B W169 W245 Tow Protection Switch Button Control Unit Module

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A6519007500-27

Mercedes SLK R172 250CDI OM651.980 Engine Control ECU Kit A6519007500 Automatic

€313.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2078202810

Mercedes W207 Convertible Anti Theft Roof ITS TPS Sensor Module Unit A2078202810

€37.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2469008610

Mercedes W176 Stereo Audio Radio CD Head Unit Control Panel A2469008610

€42.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2465400308-1

Mercedes W176 W246 OM651 Alternator Cable Battery Prefuse Box A2465400308

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1648209226

Mercedes ML W164 Keyless Go Module ECU Door Lock Control Unit A1648209226

€37.95

Free delivery: Sep 23 – 24

If paid before 14:00

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