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 W163 Rear Bench Shock Absorber Strut A1639200210

€32.95

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Part no. A2115452601

Mercedes ML W164 Prefuse Fuse Distribution Box Front A2115452601

€23.95

Free delivery: Sep 23 – 24

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Part no. A1669051702

Mercedes-Benz A C M W166 W176 W205 Aerial Antenna Amplifier Unit A1669051702

€23.95

Free delivery: Sep 23 – 24

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Part no. A1779006604

Airbag Module Mercedes C118 W177 W247 Front Air Bag Control Unit ECU A1779006604

€51.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A6549007900-1

Mercedes W205 C300de OM654.920 306HP Engine Unit ECU Kit A6549007900 Automatic

€560.95

Free delivery: Sep 23 – 24

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Part no. A1669063201-2

Mercedes ML W166 Rear Lamp Trunk Tail Light Wire Connector Right O/S A1669063201

€23.95

Free delivery: Sep 23 – 24

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Part no. A1645400750

Mercedes ML W164 Battery Fuse Box Power Distribution A1645400750

€23.95

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Part no. A2719000700

Mercedes R171 SLK200 Kompressor M271.954 Engine Control Unit ECU A2719000700

€180.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1331500120

Mercedes C117 W176 Temperature Sensor Adapter Wiring Harness Loom A1331500120

€32.95

Free delivery: Sep 23 – 24

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Part no. A6429002900-5

Mercedes C207 C350 CDI BE OM642.836 Engine Control ECU Kit A6429002900 Automatic

€379.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1569057900

Mercedes W176 Aerial Antenna Amplifier A1569057900

€23.95

Free delivery: Sep 23 – 24

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Part no. A6421505526-1

Mercedes C219 CLS 320 CDI 224HP OM642.920 Engine ECU Kit A6421505526 Automatic

€132.95

Free delivery: Sep 23 – 24

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Part no. A6549003200-2

Mercedes W213 E220d OM654 194HP Engine Control ECU Kit A6549003200 Automatic

€208.95

Free delivery: Sep 23 – 24

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Part no. A2098209610

Mercedes CLK W209 Convertible Alarm Anti Theft System Control Unit A2098209610

€23.95

Free delivery: Sep 23 – 24

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Part no. A9078280000

Mercedes W906 W907 Radio Antenna Rod Roof Antenna A9078280000

€28.95

Free delivery: Sep 23 – 24

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Part no. A2059007615

Module Mercedes W205 Air Conditioning Control Module A2059007615

€28.95

Free delivery: Sep 23 – 24

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Part no. A2514401909

Mercedes W164 W251 Wiring Loom Cable Harness Door Front Left Right A2514401909

€23.95

Free delivery: Sep 23 – 24

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Part no. A1185402504

Mercedes C118 Door Harness Rear Left N/S Door Wiring Loom A1185402504

€37.95

Free delivery: Sep 23 – 24

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Part no. A6394405009

Wiring Loom Mercedes W639 Vito Cable Door Wiring Cable A6394405009

€23.95

Free delivery: Sep 23 – 24

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Part no. A2048208526

Mercedes W204 Parking Sensor Parktronic Display Control A2048208526

€23.95

Free delivery: Sep 23 – 24

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Part no. A2469007314-1

Mercedes CLA C117 Central Display Screen Multimedia Sat Nav Unit A2469007314

€66.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2129005401

Mercedes W207 Fuse Junction Box Relay Control Unit Module SAM A2129005401

€51.95

Free delivery: Sep 23 – 24

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Part no. A6461509777-2

Mercedes C209 Engine Control ECU 2.1 Diesel 150 HP A6461509777 Automatic KIT

€142.95

Free delivery: Sep 23 – 24

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Part no. A0009008718

Climate Control Module Mercedes W205 W213 Air Conditioning A/C Unit A0009008718

€28.95

Free delivery: Sep 23 – 24

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Part no. A0495453128

Steering Lock Cable Mercedes W169 W204 Connector Plug Wiring Loom A0495453128

€23.95

Free delivery: Sep 23 – 24

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Part no. A1725403405

Mercedes R172 OM651 Diesel Alternator Wiring Harness Cable Loom A1725403405

€23.95

Free delivery: Sep 23 – 24

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Part no. A2129060005-1

Mercedes W212 Fuse Box Module Rear Relay Electric Control Unit SAM A2129060005

€23.95

Free delivery: Sep 23 – 24

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Part no. A1715400406

Mercedes SLK R171 Window Lifter Lift Mechanism Cable Wiring Harness A1715400406

€23.95

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Part no. A2129004901

Fuse Box Mercedes W212 Rear SAM Relay Control Unit Module A2129004901

€28.95

Free delivery: Sep 23 – 24

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Part no. A6519004500

Mercedes W205 Engine Control ECU Unit 204HP Diesel Automatic Gearbox A6519004500

€42.95

Free delivery: Sep 23 – 24

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Part no. A1669003903

Mercedes GLE W166 GLS X166 Air Module Unit Control ECU SRS A1669003903

€113.95

Free delivery: Sep 23 – 24

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Part no. A2036901430

Mercedes C CLC Class CL203 W203 Rear SAM Unit Fuse Box Trim Cover A2036901430

€23.95

Free delivery: Sep 23 – 24

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Part no. A2469004313

Gearbox Module Mercedes W176 Automatic Transmission Unit ECU A2469004313

€23.95

Free delivery: Sep 23 – 24

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Part no. A2465452840

Mercedes-Benz A B W176 W246 Control Module Housing Bracket Mount A2465452840

€23.95

Free delivery: Sep 23 – 24

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Part no. A2188205061-1

Mercedes C218 Front Headlight Wiring Harness Cable Right O/S A2188205061

€23.95

Free delivery: Sep 23 – 24

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Part no. A2118705726

Air Module Mercedes W211 C219 Air System Control Unit ECU A2118705726

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2125406250-1

Mercedes W212 SAM Fuse Prefuse Box Relay Junction Control Unit A2125406250

€56.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2513200158

Mercedes W251 W906 Valve Block Air Suspension Control Unit Module A2513200158

€56.95

Free delivery: Sep 23 – 24

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Part no. A2198203626

Mercedes CLS W219 Door Module Rear Right O/S Control Unit A2198203626

€23.95

Free delivery: Sep 23 – 24

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Part no. A1645460461

Mercedes ML W164 Cable Duct Wiring Guide Bracket Trim Right O/S A1645460461

€28.95

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Part no. A1679005218

Mercedes W167 W177 Radio Stereo Nav Navigation Head Unit High A1679005218

€450.95

Free delivery: Sep 23 – 24

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Part no. A2075451740

Mercedes-Benz A207 W207 Cabrio Control Unit Module Bracket Holder A2075451740

€23.95

Free delivery: Sep 23 – 24

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Part no. A2059009230

Air Conditioning Module Mercedes W205 C253 A/C Control Unit ECU A2059009230

€23.95

Free delivery: Sep 23 – 24

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Part no. A2115455232

Mercedes W211 Front Fuse Box SAM SRB Module Relay Control Unit A2115455232

€23.95

Free delivery: Sep 23 – 24

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Part no. A1669052102

Mercedes W166 Battery Cable Wire Negative Minus Battery Sensor A1669052102

€66.95

Free delivery: Sep 23 – 24

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Part no. A1635409108

Mercedes-Benz M ML W163 Rear Window Heater Cable Harness Wiring A1635409108

€23.95

Free delivery: Sep 23 – 24

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Part no. A1131533479

Mercedes W163 W211 W220 Engine Control Unit ECU 279HP S430 Automatic A1131533479

€180.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1779061302

Mercedes EQA H243 W247 Fuse Box Relay Control Unit Module A1779061302

€80.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2465403505

Door Wiring Mercedes W176 W246 Front Passenger Side Cable Harness A2465403505

€23.95

Free delivery: Sep 23 – 24

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Part no. A2055406621

Starter Cable Mercedes W205 GLC X253 Electrical Wiring Harness A2055406621

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2218702086

Mercedes W221 Rear Seat Control Module Unit ECU A2218702086

€23.95

Free delivery: Sep 23 – 24

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Part no. A2055408709

Mercedes W205 Door Wiring Harness Loom Cable Front Driver's Side A2055408709

€47.95

Free delivery: Sep 23 – 24

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Part no. A0061519801

Mercedes W204 W212 W251 Starter Motor 642872 Diesel Engine Starter A0061519801

€56.95

Free delivery: Sep 23 – 24

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Part no. A0038208426

Crash Sensor Mercedes ML W164 W221 Front Rear Impact Airbag Unit A0038208426

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2139068701-2

Mercedes W205 W213 Fuse Box Rear SAM Module Electrical Control Unit A2139068701

€23.95

Free delivery: Sep 23 – 24

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Part no. A2045401307

Mercedes W204 Centre Console Lightning Dashboard Cable Wiring A2045401307

€23.95

Free delivery: Sep 23 – 24

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Part no. A1665401913

Mercedes W166 GLE Heater Booster PTC Wiring Harness Loom Cable A1665401913

€37.95

Free delivery: Sep 23 – 24

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Part no. A1639800164

Mercedes W163 Rear Bench Backrest Gas Strut Right O/S Side A1639800164

€32.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0035420219-3

Mercedes W639 W906 Relay 5-Pin Control Unit 12A Blue A0035420219

€23.95

Free delivery: Sep 23 – 24

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Part no. A2135400200

Mercedes W205 W213 W238 Fuse Box Cover Control Unit Holder Bracket A2135400200

€23.95

Free delivery: Sep 23 – 24

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Part no. A2469000717

Mercedes C117 X156 All Wheel Drive Control Unit Module ECU MFA A2469000717

€32.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2044401402

Mercedes W204 Parktronic Parking Distance Control Module Unit ECU A2044401402

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2129006417-2

Mercedes W207 W212 Radio Head Unit CD Player Control Panel Switch A2129006417

€61.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2028281114

Mercedes-Benz C CLK W202 W208 Alarm Control Module Bracket Holder A2028281114

€23.95

Free delivery: Sep 23 – 24

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Part no. A2044400235

Mercedes C204 Front Bumper Wiring Harness Loom Cable A2044400235

€66.95

Free delivery: Sep 23 – 24

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Part no. A2208203085

Mercedes C199 C215 W220 Air Module ECU Control Unit S430 113941 A2208203085

€32.95

Free delivery: Sep 23 – 24

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Part no. A2139001909

Mercedes W213 Ambient Lighting Control Unit Module ECU A2139001909

€56.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0009002501

Mercedes C204 Video Radar Sensor Control Module Unit ECU A0009002501

€75.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0009004836

Mercedes W177 W247 Driving Dynamics Module Control Unit ECU A0009004836

€142.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0015426519

Mercedes C140 Brake Pump Relay Electrical Fuse Module Control Unit A0015426519

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0009007607

Mercedes-Benz E-Class W207 W212 Front Windscreen Windshield Lane Assist Camera

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2479004505-1

Mercedes Vito W447 Sprinter W907 W910 Telematics Module Control Unit A2479004505

€37.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2661538979-1

Mercedes W169 A150 W245 B150 Engine Control ECU Kit A2661538979 + Key Automatic

€265.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2059003913

Mercedes W205 Relay Module Body Control Module Unit SAM BCM A2059003913

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1698208689

Mercedes W169 W245 Amplifier Antenna Sensor Control Unit Module A1698208689

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2465402610

Mercedes-Benz A B W176 W246 160 180 CDI Alternator Cable Loom Wire A2465402610

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2048709289

Mercedes W204 Right O/S Antenna Amplifier Filter Module A2048709289

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0005406050

Mercedes ML W164 W169 W205 W212 Fuse Box Relay Control Unit Module A0005406050

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1665400841

Ground Line Mercedes ML W166 Battery Earth Negative Cable Wire A1665400841

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1679009330

Mercedes C118 W167 W177 W243 W247 Ignition Control Module Unit ECU A1679009330

€284.95

Free delivery: Sep 23 – 24

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Part no. A1715405045

Mercedes SLK R171 Central Gateway Module ECU Control Unit A1715405045

€23.95

Free delivery: Sep 23 – 24

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Part no. A2139065706

Mercedes W205 W213 Front Engine Compatment Fuse Relay Box Module A2139065706

€37.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0018275101

Mercedes W164 Tyre Pressure Sensor Rear Right Left Antenna Module A0018275101

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2469008813

Module Mercedes W176 A45 AMG M133 4matic All Wheel Drive Control A2469008813

€23.95

Free delivery: Sep 23 – 24

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Part no. A9075406849

Mercedes Sprinter W907 Ground Line Battery Earth Cable Wire A9075406849

€23.95

Free delivery: Sep 23 – 24

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Part no. A2115450301-1

Mercedes S211 W211 W219 Fuse Distribution Box Unit A2115453901

€23.95

Free delivery: Sep 23 – 24

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Part no. A2118206185

Mercedes E S Class W211 W220 Telephone Hands Free Control Module A2118206185

€23.95

Free delivery: Sep 23 – 24

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Part no. A2044405835

Mercedes S204 Front Door Wiring Loom Harness Cable Driver Side A2044405835

€23.95

Free delivery: Sep 23 – 24

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Part no. A4479001118

Mercedes W447 Front Air Module Control Unit ECU A4479001118

€488.95

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Part no. A2055400010

Mercedes W205 Door Wiring Harness Loom Cable Front Passenger Side A2055400010

€37.95

Free delivery: Sep 23 – 24

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Part no. A2056186000

Mercedes W205 W238 Rear Battery Holder Bracket Mount Strap Clamp A2056186000

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2125458040

Bracket Holder Mercedes W204 W212 W222 Auxiliary Generator Battery A2125458040

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2045402210

Mercedes W204 Front Door Electrical Cable Wiring Loom A2045402210

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1645400641

Mercedes-Benz M-Class W164 Battery Ground Earth Strap Cable Wiring A1645400641

€28.95

Free delivery: Sep 23 – 24

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Part no. A2479007312

Mercedes W212 Suspension Module Adjustment Control Unit Controller A2479007312

€94.95

Free delivery: Sep 23 – 24

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Part no. A2208200175

Mercedes W220 Front Door Keyless Entry Antenna Left N/S Side A2208200275

€23.95

Free delivery: Sep 23 – 24

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Part no. A2129003702-1

Mercedes W212 Fuse Box Rear SAM Relay Control Unit Module A2129003702

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2048200164-2

Mercedes W204 Rear Tail Light Wiring Loom Harness Plug Left N/S A2048200164

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2055401410

Mercedes S205 C253 Rear Door Harness Wiring Cable Left Right N/O/S A2055401410

€28.95

Free delivery: Sep 23 – 24

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