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 W205 GLC X253 Centre Console Wiring Harness Cable Loom A2055401724

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A0005465402

Mercedes C117 W176 W246 Positive Battery Terminal Cover Cap Trim Red A0005465402

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2709060026-1

Starter Motor Mercedes W176 W246 Engine Starter Unit 12V Denso A6459060300

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2469067100-1

Mercedes W176 W246 C117 Fuse Relay Box Unit Cables Wiring Loom A2469067100

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A7899061200

Mercedes C205 Control Unit Module A7899061200

€208.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A1698209226

Door Control Module Mercedes W169 W245 Relay Unit Right Rear O/S A1698209226

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A1718200015

Mercedes SLK R171 Rear Window Heating Cable Loom Heat Wiring Harness A1718200015

€32.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A0009006318

PDC Module Mercedes W205 W213 W247 Parking Assistant Parktronic Unit A0009006318

€99.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2048202275

Mercedes W204 W212 C218 Bluetooth Antenna Amplifier Wiring Cable A2048202275

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A1775401858

Mercedes W118 W177 W247 Starter Alternator Wiring Loom Harness Cable A1775401858

€66.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2079012500

Air Module Mercedes C204 C207 Sensor Control Unit ECU A2079012500

€37.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A1331420500

Mercedes W176 C117 A45 CLA45 Engine Sound Generator Control Unit A1331420500

€61.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2045401434

Mercedes W204 OM642 Alternator Starter Wiring Harness Cable A2045401434

€42.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2205400507

Mercedes W220 Door Wiring Harness Rear Right Left N/O/S Keyless Go A2205400507

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2479007709

Front Camera Module Mercedes C118 W177 W247 Lane Assist Control Unit A2479007709

€94.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2055407067

Mercedes W205 Front Door Harness Wiring Loom Passenger Side A2055407167

€37.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A6549009400-3

Mercedes W907 315CDI OM654.920 Engine Unit Module ECU Kit A6549009400 BCM + Key

€474.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A1725402209

Mercedes R172 Glove Box Wiring Loom A1725402209

€32.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A1330901500

Mercedes W176 A45 C117 CLA45 Engine Sound Generator Valve A1330901500

€142.95

Free delivery: Sep 14 – 16

If paid before 14:00

Part no. A1695450046

Mercedes-Benz A C W169 W204 Battery Relay Module Box A1695450046 A0035422619

€32.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2215400210

Mercedes W221 Door Wiring Cable Rear Right O/S Door Loom Harness A2215400210

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A1729002301

Mercedes SLK R172 Door Control Unit Module Front Left N/S A1729002301

€32.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2514402009

Mercedes W164 Front Left Right N/O/S Door Wiring Loom Harness A2514402009

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2198203326

Mercedes C219 Rear Door Control Module Unit Left N/S A2198203326

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A1715409506

Mercedes R171 Window Control Switch Wiring Cable Driver Side A1715409506

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A6519000603-1

Mercedes W205 C205 BlueTec OM651.921 Engine Control Unit ECU Kit A6519000603 Key

€284.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2465406607

Positive Cable Mercedes W176 W246 Battery Lead Plus Pole Red A2465406607

€28.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A1729001506

Mercedes R172 Convertible Roof Control Module ECU A1729001506

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A6401503634-2

Mercedes W169 W245 OM640.940 109HP Engine Control ECU Kit A6401503634 Automatic

€227.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2218702286

Mercedes W221 Front Seat Heater Control Unit Module ECU A2218702286

€28.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A1695450140

Mercedes A B Class W169 W245 Holder Bracket Engine Control Unit A1695450140

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A0005400502

Mercedes W212 W221 W447 W906 Adblue Injector Wiring Cable Loom A0005400502

€32.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A0038212751

Mercedes-Benz M S W221 ML W164 Airbag Impact Crash Sensor Door A0038212751

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2079001100

Door Module Mercedes C207 W207 Front Left N/S Control Unit ECU A2079001100

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A1775400358

Mercedes W177 Ground Line Cable Wire A1775400358

€51.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A1695457740

Mercedes-Benz A B W169 W245 Bracket Starter Alternator Control Unit A1695457740

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2095453140

Fuse Box Holder Mercedes W209 Control Unit Mount Bracket CLK A2095453140

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A1635407405

Mercedes ML W163 Front Electric Seat Adjust Wiring Harness Cable A1635407405

€47.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A0045467740

Mercedes W447 Drive Train Sensor Can Distributor A0045467740

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2515404206

Mercedes W251 Rear Bumper Parktronic Wiring Loom Parking Sensor A2515404206

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A0025428419

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

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2048205189

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

€28.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2479002613

Mercedes CLA C118 W177 W205 W213 Telematics Control Unit Module A2479002613

€80.95

Free delivery: Sep 15 – 16

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 15 – 16

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 15 – 16

If paid before 14:00

Part no. A6421500326

Mercedes W204 OM642 224HP Engine Control ECU A6421500326 Automatic

€165.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A1725401209

Mercedes R172 Teleaid Monitoring Sensors Wiring Harness Cable Loom A1725401209

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2465408111

Mercedes W246 Door Wiring Loom Cable Front Right A2465408111

€32.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A4144460116

Mercedes W414 Central Locking Lock Alarm Control Module ECU A4144460116

€47.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2055404767

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

€37.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2125400072

Mercedes W212 Fuse Box Housing Relay Unit Module A2125400072

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2118705526

Mercedes W219 Motorola Telephone Control Module DC UHI MOST A2118705526

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2139004009

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

€23.95

Free delivery: Sep 15 – 16

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 15 – 16

If paid before 14:00

Part no. A2218208202

Mercedes W221 Front Centre Dashboard Tweeter Speaker A2218208202

€33.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2215408401

Mercedes W221 Air Suspension Control Unit Module A2215408401

€37.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A6395400044

Mercedes Vito W639 Anti Theft Alarm Switch Loom Cable A6395400044

€32.95

Free delivery: Sep 15 – 16

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 15 – 16

If paid before 14:00

Part no. A2135409616

Mercedes Sprinter W910 Battery Sensor Negative Terminal Cable Wiring A2135409616

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2218707293

Mercedes W221 Seat Control Module Unit Ecu Rear A2218707293

€32.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A1725404105

Mercedes R172 Rain Sensor Wiring Harness Cable Loom A1725404105

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2469008113

Mercedes GLE X156 4Matic Transfer Control Unit Module ECU A2469008113

€61.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2118701585-1

Rain Sensor Mercedes W211 W219 Windscreen Control Unit Module A2118701585

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A1669001709

Mercedes ML W166 SRS System Air Module Control Unit ECU A1669001709

€42.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2218207389

Mercedes W221 Seat Headrest Display Monitor Rear Entertainment Unit A2218207389

€218.95

Free delivery: Sep 15 – 16

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 15 – 16

If paid before 14:00

Part no. A2515401830

Mercedes W251 Starter Motor Alternator Wiring Harness Cable Loom A2515401830

€23.95

Free delivery: Sep 15 – 16

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 15 – 16

If paid before 14:00

Part no. A1175450800

Negative Battery Terminal Mercedes C117 W176 W246 Lead Connector A1175450800

€23.95

Free delivery: Sep 15 – 16

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 15 – 16

If paid before 14:00

Part no. A6519007500

Mercedes W212 E220CDI OM651.924 Engine Unit Module ECU A6519007500 Automatic

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2125406905

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

€28.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A4475411200

Mercedes Vito W447 Battery Support Holder Bracket Mount Tray A4475411200

€32.95

Free delivery: Sep 15 – 16

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 15 – 16

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 15 – 16

If paid before 14:00

Part no. A0035453501

Mercedes Vaneo W414 Sprinter W901 W902 W903 Fuse Box Battery A0035453501

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2125406805

Mercedes W212 Door Wiring Cable Front Right O/S A2125406805

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2048204326

Mercedes W204 Interior Roof Cabin Light Panel Sensor Control Unit A2048204326

€94.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A1729004004

Mercedes W204 Display Screen Multifunction Navigation Dashboard A1729004004

€66.95

Free delivery: Sep 15 – 16

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 15 – 16

If paid before 14:00

Part no. A2053401800

Mercedes W205 Pipe Line Piping Side Battery A2053401800

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2049005503

Mercedes C207 Complete Damper Adjustment Control Module ECU A2049005503

€70.95

Free delivery: Sep 15 – 16

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 15 – 16

If paid before 14:00

Part no. A1728200526

Mercedes R172 SLK Air Module SRS Control Unit ECU A1728200526

€80.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2046190048

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

€23.95

Free delivery: Sep 15 – 16

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 15 – 16

If paid before 14:00

Part no. A4159007503

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

€237.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2049004406

Mercedes W204 Radio Stereo CD Player Head Unit A2049004406

€108.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2125406105

Mercedes W212 Rear LED Wiring Cable Harness Loom A2125406105

€23.95

Free delivery: Sep 15 – 16

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 15 – 16

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 15 – 16

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 15 – 16

If paid before 14:00

Part no. A2229004619

Mercedes W205 W213 C238 Bluetooth Hermes LTE Control Unit Module A2139002210

€113.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2385452700

Mercedes C238 Rear Control Unit Module Bracket Holder Trim Panel A2385452700

€23.95

Free delivery: Sep 15 – 16

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 15 – 16

If paid before 14:00

Part no. A2469009212

Mercedes X117 Tailgate Boot Control Rear Module Unit A2469009212

€80.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2125406505

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

€37.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A1645451840

Mercedes W164 ECU Control Unit Bracket Holder A1645451840

€23.95

Free delivery: Sep 15 – 16

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 15 – 16

If paid before 14:00

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