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 W212 W246 Parking Distance Sensor Set x2 Cavansite Blue - 890

€23.95

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Part no. A2059064505-2

Mercedes S205 Estate Rear Headlight Wiring Harness Cable Right O/S A2059064505

€23.95

Free delivery: Nov 12 – 13

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Part no. A2118702926

Mercedes W211 C219 Front Windscreen Rain And Light Sensor Rain-Light A2118702926

€23.95

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Part no. A2118704085

Seat Module Mercedes W203 W211 Control Unit Front Left Right N/O/S A2118704085

€75.95

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Part no. A2539059800

Mercedes W205 Lid Boot Trunk Tailgate Smart Opener Control Module A2539059800

€37.95

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Part no. A2479006309

Mercedes C118 W177 W247 Dashboard Display Multi Screen Panel A2479006309

€113.95

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Part no. A2205400382

Mercedes CL S Class C215 W220 Fuse Box Unit Front Right O/S Cover A2205400382

€28.95

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Part no. A0045454140

Mercedes ML W164 W251 Door Wiring Joint Protective Cap Bracket

€23.95

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Part no. A1775403742

Mercedes W177 Interior Roof Lining Wiring Loom Harness Cable Wire A1775403742

€75.95

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Part no. A2218201875

Mercedes W221 Aerial Antenna Control Unit Keyless Go Entry Module A2218201875

€23.95

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Part no. A2118210197

Mercedes E-Class W211 Rear Door Wiring Loom Harness Rubber Grommet A2118210197

€23.95

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Part no. A2208200475

Mercedes W220 Rear Door Keyless Entry Antenna Right O/S Side A2208200475

€23.95

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Part no. A0998200183

Keyless Module Mercedes W205 W222 ECU Door Lock Control Unit A0998200183

€23.95

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Part no. A1669003208

Mercedes ML W166 SAM Control Unit Rear Fuse Module A1669003208

€142.95

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Part no. A2129005614-2

Mercedes A207 W212 W218 Radio Head Unit Navi CD Player Navigation A2129005614

€203.95

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Part no. A2139002817

Mercedes W177 W205 C257 Radar Sensor Front Control Unit Module A2139002817

€189.95

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Part no. A2059064405-2

Mercedes S205 Estate Rear Headlight Wiring Harness Cable Left N/S A2059064405

€23.95

Free delivery: Nov 12 – 13

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Part no. A2059007218-2

Mercedes GLC X253 Rear Trunk Lid Automatic Closing Lock Mechanism A2059007218

€28.95

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Part no. A0009827723

Fuse Relay Mercedes W176 W204 W246 4-Pin Unit Black Hella A0009827723

€23.95

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Part no. A1698207526

Mercedes-Benz A B Class W169 W245 Door Control Unit Left N/S Rear A1698207526

€23.95

Free delivery: Nov 12 – 13

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Part no. A0009059300

Mercedes W205 W212 W246 Parking Distance Sensor Parktronic White A0009059300

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2465402306

Mercedes W246 Centre Console Wiring Harness Loom Cable A2465402306

€23.95

Free delivery: Nov 12 – 13

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Part no. A2118703185

Mercedes W211 Door Module Rear Left N/S Control Unit ECU A2118703185

€23.95

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Part no. A1695406409

Mercedes W169 W245 Battery Earth Negative Cable Wiring Loom A1695406409

€23.95

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Part no. A1638900144

Mercedes W163 Spare Wheel Carrier Fixing Plate Bracket Left N/S A1638900144

€23.95

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Part no. A2208200375

Mercedes W220 Rear Door Keyless Entry Antenna Left N/S Side A2208200475

€23.95

Free delivery: Nov 12 – 13

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Part no. A2229001908

Mercedes W205 Door Control Module Unit ECU Front Right O/S A2229001908

€37.95

Free delivery: Nov 12 – 13

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Part no. A1699007400

Parking Sensor Mercedes W169 W245 PDC Distance Control Unit Module A1699007400

€75.95

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Part no. A0009009400

Mercedes A207 Automatic Gearbox Transmission Control Module ECU A0009009400

€284.95

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Part no. A2095404010

Mercedes A209 Front Door Cable Wiring Loom Harness Left N/S A2095404010

€28.95

Free delivery: Nov 12 – 13

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Part no. A2229001712

Door Module Mercedes W205 X253 Front Door Right O/S Control Module A2229001512

€23.95

Free delivery: Nov 12 – 13

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Part no. A0025450601

Mercedes W906 Fuse Relay Box Module Control Unit A0025450601

€28.95

Free delivery: Nov 12 – 13

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Part no. A2059008143

Mercedes W205 Front Telephone Wireless Charging Load Wattage Module A2059008143

€32.95

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Part no. A2139005220

Mercedes W213 SAM Module Rear Body Comfort Control Unit ECU A2139005220

€32.95

Free delivery: Nov 12 – 13

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Part no. A2129061803-2

Mercedes S212 Rear Tail Light Lamp Outer Wiring Harness Right O/S A2129061803

€23.95

Free delivery: Nov 12 – 13

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Part no. A2229001708

Mercedes W205 Door Control Module Front Left N/S A2229001708

€32.95

Free delivery: Nov 12 – 13

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Part no. A9109053300

Mercedes Sprinter W910 Battery Sensor Negative Terminal Cable A9109053300

€42.95

Free delivery: Nov 12 – 13

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Part no. A2229001512

Mercedes W205 X253 Door Module Front Door Left N/S Control Module A2229001512

€23.95

Free delivery: Nov 12 – 13

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Part no. A2721530392

Mercedes CL203 Engine Control ECU Kit M272.920 204HP A2721530392 Automatic

€237.95

Free delivery: Nov 12 – 13

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Part no. A2049005015

Mercedes C204 W207 Suspension Damper Adjustment Control Unit Module A2049005015

€189.95

Free delivery: Nov 12 – 13

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Part no. A1729006609-2

Mercedes SLK R172 Radio CD Player Sat Nav Comand Head Unit A1729006609

€151.95

Free delivery: Nov 12 – 13

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Part no. A1665400224-1

Mercedes W166 Fuse Relay Box Fusebox Housing Cover Unit 3.0 Diesel A1665400224

€66.95

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Part no. A2218101817-1

Mercedes W221 Headlining Interior Mirror Rear Left Right N/O/S A2218101817

€23.95

Free delivery: Nov 12 – 13

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Part no. A2055401542

Mercedes W205 Rear Door Harness Wiring Cable Left Right N/O/S A2055401542

€61.95

Free delivery: Nov 12 – 13

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Part no. A2229001912

Mercedes W205 C253 Door Module Rear Left N/S Control Unit ECU A2229001912

€23.95

Free delivery: Nov 12 – 13

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Part no. A2469000616

COMAND Head Unit Mercedes CLA C117 W176 W246 Nav Sat Radio Player A2469000616

€61.95

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Part no. A2479003808

Suspension Module Mercedes C118 W177 W247 Control Unit ECU A2479003808

€123.95

Free delivery: Nov 12 – 13

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Part no. A4475402231

Mercedes W447 Sliding Door Wiring Loom Harness Right O/S A4475402231

€32.95

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Part no. A2229002308

Mercedes W205 S205 W222 Door Control Module ECU Rear Right O/S A2229002308

€47.95

Free delivery: Nov 12 – 13

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Part no. A6461532591-2

Mercedes W639 111 CDI OM646 109HP Engine Unit Module ECU Kit A6461532591 Manual

€664.95

Free delivery: Nov 12 – 13

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Part no. A2035409213

Mercedes W203 Door Wiring Harness Front Left Right N/O/S Wiring Loom A2035409213

€27.95

Free delivery: Nov 12 – 13

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Part no. A1775404107

Mercedes C118 W177 W247 Fuse Box Battery Relay Terminal A1775404107

€70.95

Free delivery: Nov 12 – 13

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Part no. A2129061703-2

Mercedes S212 Rear Tail Light Lamp Wiring Harness Outer Left N/S A2129061703

€23.95

Free delivery: Nov 12 – 13

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Part no. A4475406453

Battery Cable Mercedes Vito W447 Diesel OM651 Alternator Wiring A4475406453

€23.95

Free delivery: Nov 12 – 13

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Part no. A2218705093

Mercedes W221 Door Control Module Unit ECU Rear Left Right N/O/S A2218705093

€56.95

Free delivery: Nov 12 – 13

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Part no. A2198200226

Door Module Mercedes C219 Rear Door Left N/S Control Module A2198200226

€23.95

Free delivery: Nov 12 – 13

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Part no. A2215408809

Mercedes W221 Door Harness Wiring Loom Rear Left N/S A2215408809

€32.95

Free delivery: Nov 12 – 13

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Part no. A4474404705

Engine Wiring Mercedes Vito W447 OM651 Engine Harness Cable A4474404705

€23.95

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Part no. A1779059402

Mercedes W177 Remote Car Key Electronic A1779059402

€94.95

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Part no. A1638200289

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

€23.95

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Part no. A2118703285

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

€23.95

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Part no. A2118704885

Mercedes W164 W211 Front Passenger Seat Memory Control Unit Module A2118704885

€32.95

Free delivery: Nov 12 – 13

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Part no. A2218702993

Mercedes CL W216 W221 Air Module Control Unit A2218702993

€23.95

Free delivery: Nov 12 – 13

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Part no. A6519009702-4

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

€189.95

Free delivery: Nov 12 – 13

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Part no. A0005401203

Mercedes GLC 300e X253 Coupe Hybrid Electrical Battery Wire A0005401203

€23.95

Free delivery: Nov 12 – 13

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Part no. A2185403405

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

€23.95

Free delivery: Nov 12 – 13

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Part no. A6429005101

Mercedes W166 X204 W212 W221 AdBlue Control Module ECU 3.0 Diesel A6429005101

€66.95

Free delivery: Nov 12 – 13

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Part no. A1669006307

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

€23.95

Free delivery: Nov 12 – 13

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Part no. A2059001217

Mercedes W205 W447 Camera Surround View Control Unit Module A2059001217

€189.95

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Part no. A2135406831

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

€28.95

Free delivery: Nov 12 – 13

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Part no. A1695400506

Mercedes W169 Front Bumper Parking Sensor Wiring Loom Cable Harness A1695400506

€47.95

Free delivery: Nov 12 – 13

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Part no. A2439008400

Mercedes GLC X253 Sound Audio Amplifier Module Rear Harman A2439008400

€56.95

Free delivery: Nov 12 – 13

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Part no. A1679008207

Telematics Module Mercedes W177 W247 Communication Control Unit ECU A1679008207

€113.95

Free delivery: Nov 12 – 13

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Part no. 21014375

Mercedes W204 C220 Heater Blower Cable Loom Wiring Adapter Connector 21014375

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2469000005

Mercedes W176 PDC Parking Distance Control Module Unit A2469000005

€66.95

Free delivery: Nov 12 – 13

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Part no. 06E903018L

Audi A4 S4 8K A5 S5 8F 8T Q5 8R Engine Alternator 3.0 TFSI 14V 180A 06E903018L

€51.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2465403803-1

Mercedes W117 W156 W176 W242 W246 Electrical Fuse Relay Box A2465403803

€23.95

Free delivery: Nov 12 – 13

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Part no. A2056200018

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

€23.95

Free delivery: Nov 12 – 13

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Part no. A2579005100

Mercedes Sprinter W907 Telematics Services Communication Module A2579005100

€113.95

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Part no. A0115453826

Mercedes W163 Data Connector Link Plug Wire Harness Pigtail A0115453826

€23.95

Free delivery: Nov 12 – 13

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Part no. A1648202679

Mercedes ML W164 Radio Player Audio Stereo CD Player Head Unit A1648202679

€284.95

Free delivery: Nov 12 – 13

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Part no. A7899823500

Mercedes EQA H243 Engine Relay 20A ECU A7899823500

€51.95

Free delivery: Nov 12 – 13

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Part no. A0038202926

Mercedes W164 X164 W221 SRS Airbag Impact Crash Sensor A0038202926

€23.95

Free delivery: Nov 12 – 13

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Part no. A2168204726

Mercedes W221 Bluetooth Control Module Mobile Phone Interface A2168204726

€23.95

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Part no. A2055404834

Mercedes W205 GLC C253 Touch Pad Controler Wiring Harness Loom A2055404834

€32.95

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Part no. A2129007324

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

€56.95

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Part no. A2185403005-1

Mercedes CLS C218 Front Door Wiring Harness Loom Passenger Side A2185403005

€28.95

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Part no. A2075405205

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

€23.95

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Part no. A2185403005

Mercedes CLS C218 Front Door Wiring Harness Loom Passenger Side A2185403005

€23.95

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Part no. A2469008516

Parking Brake Module Mercedes W176 W246 Electric Control Unit ECU A2469008516

€23.95

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Part no. A2208200275

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

€23.95

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Part no. A2216890614

Mercedes W221 PDC Distance Control Holder Bracket A2216890614

€23.95

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Part no. A2229001306

Mercedes W910 Gearbox Module Transmission Basic Control Unit A2229001306

€28.95

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Part no. A2479002307

Mercedes W177 W247 4Matic Transfer Control Unit Module ECU A2479002307

€137.95

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Part no. A2465405933

Battery Cable Mercedes W176 W246 Terminal Starter Wiring Harness A2465405933

€23.95

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Part no. A2049002013

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

€99.95

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Part no. A6549001300-1

Mercedes W213 C238 Glow Plug Relay Diesel OM654 Preglow Module A6549001300

€32.95

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Part no. A2711504979-1

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

€560.95

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Part no. A2465406432

Battery Cable Mercedes W176 W246 Negative Lead Wiring Harness A2465406432

€23.95

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