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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Engine Wiring Mercedes C209 272960 Petrol Module Loom Harness Cables A2721503933

€123.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2049002002

Mercedes W204 C207 Air Suspension Dynamic Level Control Unit Module A2049002002

€45.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A1729050151

Mercedes-Benz A B Class W176 W246 Roof Towing Alarm Sensor Switch Module

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A6398201389

Mercedes W639 Radio Navigation CD Player System Head Unit A6398201389

€336.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2044400102

Mercedes W204 Airmatic Air Suspension Control Unit Module ECU A2044400102

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2059000327

Mercedes C205 Differential Lock Control Module Unit ECU A2059000327

€146.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2129004001

Mercedes W212 Fuse Box Control Unit Module SAM Relay Electrical Unit A2129004001

€161.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A0009068802-4

Mercedes Sprinter W906 Alternator Generator FAL1121 A6511540000

€142.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2223411000

Mercedes W205 W222 High Voltage Connector Cover Cap A2223411000

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2055451500-1

Mercedes W205 W213 C238 Battery Terminal Starter Alternator Wiring A2055451500

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A6519004500-1

Mercedes W205 C220d 651.921 170HP BlueTEC Engine ECU Kit A6519000603 Key SAM

€332.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A1779007305

Mercedes C118 W177 W247 Audio Amplifier Radio Sound Burmester Unit A1779007305

€218.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A6401501091

Mercedes W169 W245 OM640.941 140HP Engine Control ECU A6401501091 Automatic

€66.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A4475401011

Mercedes W447 Horn Signal Wiring Connector Electrical Cable A4475401011

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A0025428819-1

Mercedes W176 W246 Relay Current 4 Pin 12V Hella A0025428819 Set x2

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A1729005507-1

Mercedes R172 Head Unit Radio CD Player Multimedia Audio A1729005507

€156.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A0015452516

Mercedes W207 Automatic Gearbox Module EGS Control Unit ECU A0015452516

€75.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2049005205

Mercedes W204 Dashboard Stereo Display Screen Sat Nav Multimedia A2049005205

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2219005503

Mercedes W221 Air Suspension Module Regulation Control Unit A2219005503

€56.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2229004213

Keyless Module Mercedes W205 W213 C253 ECU Door Lock Control Unit A2229004213

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A0009059300-KB

Mercedes W205 W212 W246 Parking Distance Sensor Parktronic Black 191 A0009059300

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2125407605

Door Wiring Mercedes W212 Loom Cable Rear Left Right N/O/S A2125407605

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A0055461340

Mercedes W447 Energy Distributor Plug Module A0055461340

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2059006651

Mercedes C205 GLC C253 Body Control Comfort Module Unit SAM BCM A2059006651

€398.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2215407307

Mercedes W221 Rear Door Wiring Loom Harness Cable Left N/S A2215407307

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2055408004

Mercedes W205 Alternator Wiring Harness Loom C300h Diesel OM651 A2055408004

€28.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2056100534

Mercedes W205 Battery Support Protection Bracket Tray A2056100534

€23.95

Free delivery: Sep 11 – 15

If paid before 14:00

Part no. A2048701826

Mercedes S204 Door Module Front Left N/S Control Unit ECU A2048701826

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 283930431R

Roof Microphone Mercedes Citan W415 Interior Mic Unit Wiring Cable 283930431R

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2229003619

Mercedes W205 W213 W222 Radio Sat Nav Head Unit A2229003619

€522.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A1665459340

Mercedes W166 C292 Fuse Box Relay Control Unit Module A1665459340

€32.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2059000227

Mercedes C205 Vehicle Dynamics Suspension Control Module ECU A2059000227

€132.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A9068270005

Mercedes W639 W906 Voltage Stabilizer Control Unit Module A9068270005

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2044406135

Mercedes W204 Door Harness Loom Cable Wiring Rear Right O/S A2044406135

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2055401516

Mercedes W205 Battery Cable Negative Lead Wiring Harness Control A2055401516

€28.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A0019820823

Mercedes Sprinter W907 4-Pin Relay V23074-H1605-X123 A0019820823

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2214407910

Mercedes W221 Rear Door Wiring Loom Harness Cable Left Right N/O/S A2214407910

€28.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A1669005417

Mercedes X117 Communication Telematics Control Module Unit ECU A1669005417

€28.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2389009000

Air Module Mercedes A205 A238 A217 SRS Protection Control Unit A2389009000

€99.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2709000900-10

Mercedes W176 A 180 270.910 122HP Blue Efficiency ECU Kit A2709000900 Automatic

€379.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A0009000646

Mercedes C118 C167 W177 W247 Parktronic Parking Control Unit Module A0009000646

€284.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A0008200806

Mercedes Vito W639 Rear Air Conditioning Wiring Harness Loom A0008200806

€56.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2048701226

Mercedes S204 Door Module Rear Right O/S Control Unit ECU A2048701226

€32.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A6401500734-2

Mercedes W169 W245 OM640.941 140HP Engine Control ECU Kit A6401500734 Automatic

€189.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2125403100

Mercedes W212 Rear Parking Sensor PDC Wiring Harness Loom A2125403100

€42.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A0045450201-1

Mercedes Sprinter W906 Fuse Prefuse Box Relay Electrical Unit A0045450201

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A0009063822-1

Alternator Generator Mercedes W176 W246 Diesel Engine Bosch 175A A0009063822

€42.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2215409107

Mercedes W221 Instrument Panel Illumination Wiring Harness Cable A2215409107

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A1705451240

Mercedes R170 C215 W220 W463 Engine Control Module Holder Bracket A1705451240

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A1679006613

Mercedes W177 Sliding Roof Module Sunroof Panoramic Control Unit A1679006613

€85.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A1665400141

Mercedes W166 Petrol Engine HV Battery Earth Ground Line Cable Wire A1665400141

€28.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A0015467435

Battery Cover Mercedes W906 Battery Positive Pole Cover Red A0015467435

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A6399001001

Mercedes W639 PDC Parking Park Sensor Distance Control Module A9064460046

€28.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2466200514

Mount Support Mercedes W176 Battery Bracket Holder A2466200514

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A9065420044

Mercedes W906 Bracket Mount Fuse Distribution Box A9065420044

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2465407711

Mercedes W176 Door Harness Loom Cable Wiring Rear Left Right N/O/S A2465407711

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2055404003

Mercedes W205 Starter Alternator Wiring Harness Loom Cable OM651 A2055404003

€42.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A6511508300

Engine Wiring Mercedes W910 OM651.958 Diesel Harness Loom Cable A6511508300

€170.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2048701126

Mercedes S204 Door Module Rear Left N/S Control Unit ECU A2048701126

€32.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2048207485

Mercedes W204 Front Door Control Unit Module Right O/S A2048207485

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2229001609

Mercedes W222 Sound Amplifier Control Unit Module ECU A2229001609

€379.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A0465455728

Mercedes A207 W212 S212 Wiring Harness Plug Connector Black 2-Pin A0465455728

€32.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A1644403801

Mercedes ML350 W164 Gateway ECU Control Module Unit A1644403801

€303.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A1644400650

Mercedes W164 W251 Front Wiring Loom Harness Seat Cable Loom A1644400650

€89.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2229063302

Fuse Box Mercedes W205 W222 Engine Compartment SAM Module Relay Unit A2229063302

€56.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2909003001

Mercedes C238 E53 4matic Transfer Case Torque Distribution Control ECU

€379.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2059008015

Mercedes W205 W447 Radio Multimedia Head Unit Cd Player A2059008015

€474.95

Free delivery: Sep 11 – 15

If paid before 14:00

Part no. A4475450069-2

Mercedes Vito W447 Control Unit Fuse Box Compartment Mount A4475450069

€28.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A0325453032

Mercedes W220 Automatic Gearbox Control Unit Module ECU A0325453032

€123.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A0009050110

Mercedes W204 W212 W221 Blind Spot Radar Sensor Left Right N/O/S A0009050110

€270.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A0009054807

Mercedes W118 W177 W206 W247 NOX Sensor A0009054807

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2475455500

Mercedes W177 Control Unit Bracket Amplifier Holder Mount Carrier A2475455500

€28.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2215401833

Mercedes W221 Door Harness Left Right N/O/S Rear Door Wiring Loom A2215401833

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2465402705

Mercedes W176 Door Harness Loom Cable Wiring Front Left Right N/O/S A2465402705

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2059008218

Telematics Module Mercedes W176 W205 W218 Communication Control Unit A2059008218

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A0009000800

Mercedes W204 W207 W212 Tyre Pressure Monitor Control Unit Module A0009000800

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2514406236

Mercedes W164 Steering Wheel Air Module Wire Wiring Cale Harness A2514406236

€32.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2078200159-2

Mercedes W207 Headlight Lamp Light Front Left N/S Cable Wire Harness A2078200159

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2129004901-1

Fuse Box Mercedes W212 Rear SAM Relay Control Unit Module A2129004901

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A1779008511

Door Module Mercedes W177 W247 Rear Left Right N/O/S Control Unit A1779008511

€47.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. B67824252-1

Mercedes R171 iPod Interface Multimedia Music Connection Module Cable B67824252

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2218230050

Mercedes W221 Centre Console Telephone Keypad Control Unit Module A2218230050

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A0009052200

Windscreen Camera Mercedes W209 W212 W221 Front Control Unit Module A0009052200

€32.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A1679008406

Mercedes W167 W177 W247 Ignition Engine Control Unit Module A1679008406

€170.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2075402950

Mercedes W204 Power Distribiuton Battery Fuse Box Control Unit ECU A2075402950

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A6429006301

Mercedes ML W166 X204 W221 Exhaust Gas Aftertreatment Control Module A6429006301

€170.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2215401101

Mercedes W221 Fuse Box Control Unit SAM Module Relay Controller A2215401101

€142.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2219004704

Mercedes-Benz S W221 Comand 6-Changer CD Radio Head Unit DVD Navi A2219004704

€807.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2475400700

Mercedes W177 Rear Axle Wheel RPM Speed Left N/S Sensor Wire Harness A2475400700

€28.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2139007436

Mercedes W177 W213 Gearbox Transmission Control Module Unit ECU A2139007436

€80.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2048200015

Telephone Cable Mercedes W204 C207 W212 Wiring Adapter Line A2048200015

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A1765406109

Wiring Harness Mercedes W176 A45 AMG Petrol M133 Low Temperature Pump Adapter

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A6421501500-3

Mercedes W639 3.0CDI OM642.990 Engine Control Unit ECU Kit A6421501500 Automatic

€484.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2135452040

Mercedes W213 Head Unit Bracket Control Unit Module Holder Mount A2135452040

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2214405406

Mercedes W221 Wiring Loom Cable Harness Door Rear Right A2214405406

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2129009622

Mercedes W212 Fuse Box Relay Rear SAM Control Unit Module A2129009622

€51.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2189015200

Mercedes X218 Air Module Control Unit ECU Module A2189015200

€28.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A0035420219-1

Relay Mercedes W639 W906 5-Pin Black 12V 20A A0035420219 Set X2

€28.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2215402062

Fuel Pump Module Mercedes ML W164 W204 Petrol Control Unit ECU A2215402062

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

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