What is the construction and purpose of fuses and fuse boxes?

Fuses and fuse boxes are components of a car's electrical installation responsible for protection and power distribution to individual circuits. A typical fuse contains a fusible link with a specific current rating, and a fuse box has sockets, connectors, circuit descriptions, and often spaces for relays. These elements are mounted in the cabin, engine compartment, or trunk, depending on the vehicle version.

What are fuses and fuse boxes used for?

Fuses and fuse boxes are used to protect wires and power consumers from the effects of overloads and short circuits. Their task is also to organize electrical circuits, which facilitates diagnostics and replacement of a damaged element. Without efficient protection, a failure in one circuit can affect the operation of lights, radio, air conditioning, or control modules.

What is the construction and function of a car electrical relay?

A car electrical relay is a control element that uses a small current to switch a higher-load circuit on or off. It usually consists of a housing, a coil, working contacts, and terminals fitting into a socket in the box. The cooperation of the relay with the fuse box allows for proper power supply to systems such as fans, heating, or selected comfort modules.

How to choose the right fuse box for a car?

It is best to compare the OEM part number, interchangeable numbers, mounting location on the vehicle, and connector type. It is also worth checking the engine version, equipment, and any differences between pre-facelift and post-facelift models. For boxes integrated with relays, the completeness of the relay configuration and pin layout compatibility are also important.

What symptoms indicate a problem with a fuse or fuse box?

A typical symptom is the sudden failure of one device or a whole group of consumers, for example, lights, wipers, or the radio. In the case of a fuse box, there may be power interruptions, traces of overheating, corroded contacts, or loose sockets. Repeated fuse blowing usually means that you also need to check the installation and the component powered by the given circuit.

How to maintain fuses and fuse boxes after installation?

After installation, it is worth periodically checking the cleanliness of the housing, the condition of the cover, and the absence of moisture traces at the connectors. Do not replace a fuse with an element of a higher rating than specified by the manufacturer. It is also good practice to compare the circuit description with the actual car equipment after every major installation repair.

Fuses and fuse boxes

At Global Parts, we offer a wide selection of original used car parts, including fuses and fuse boxes for many popular car brands such as BMW, Mini, Mercedes, Audi, Volkswagen, and others. Our fuses and fuse boxes undergo quality control to ensure you receive a top-quality product.

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Mercedes S204 Estate Rear SAM Control Module Unit Fuse Box A2049060805

€28.95

Part no. A1779069601-1

Fuse Box Mercedes W177 W247 Front Relay Engine Control Unit Module A1779069601

€123.95

Part no. A2129060605

Mercedes W212 Fuse Box Rear Relay Control Unit Electric Module SAM A2129060605

€85.95

Part no. A2468200035

Mercedes-Benz A-Class W176 Mikrophone Roof Control Module A2468200035

€23.95

Part no. A1669063901

Mercedes ML W166 Relay Module Box Under Rear Right Seat F4 A1669063901

€37.95

Part no. A2215450601

Mercedes W221 Dashboard Fuse Box Front Left N/S Control Module A2215450601

€23.95

Part no. A2129004001

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

€161.95

Part no. A1665459340

Mercedes W166 C292 Fuse Box Relay Control Unit Module A1665459340

€32.95

Part no. A2205400282

Mercedes CL S Class C215 W220 Fuse Box Unit Cover Front Left A2205400282

€23.95

Part no. A0045450201-1

Mercedes Sprinter W906 Fuse Prefuse Box Relay Electrical Unit A0045450201

€23.95

Part no. A9065420044

Mercedes W906 Bracket Mount Fuse Distribution Box A9065420044

€23.95

Part no. A2229063302

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

€56.95

Part no. A4475450069-2

Mercedes Vito W447 Control Unit Fuse Box Compartment Mount A4475450069

€28.95

Part no. A2129004901-1

Fuse Box Mercedes W212 Rear SAM Relay Control Unit Module A2129004901

€23.95

Part no. A2075402950

Mercedes W204 Power Distribiuton Battery Fuse Box Control Unit ECU A2075402950

€23.95

Part no. A2215401101

Mercedes W221 Fuse Box Control Unit SAM Module Relay Controller A2215401101

€142.95

Part no. A6385450319

Mercedes W639 W638 W906 Fuse Box Unit Holder Bracket Frame A6385450319

€23.95

Part no. A0045467540

Mercedes W204 W221 Distributor Box Block Control Unit Relay A0045467540

€23.95

Part no. A2059068501-1

Fuse Box Mercedes W205 S205 W213 Fuse Box Front Relay Control Module A2059068501

€28.95

Part no. A1636880035-1

Mercedes-Benz M-Class ML W163 1 Fuse Box Relay Lid Cover Trim A1636880035

€23.95

Part no. A2045403850

Mercedes W204 SAM Fuse Prefuse Box Relay Control Unit A2045403850

€47.95

Part no. A2515450940

Mercedes W251 Fuse Box SAM Module Unit Bracket Carrier Holder A2515450940

€23.95

Part no. A2469005312

Mercedes X117 X156 W246 Relay Control Unit Module A2469005312

€75.95

Part no. A9065460643-1

Mercedes Sprinter W906 Fuse Box Relay Bracket Monunt Holder A9065460643

€23.95

Part no. A0009050338

Mercedes W212 Multi-Purpose Windscreen Camera Control Unit Module A0009050338

€23.95

Part no. A9075401805

Mercedes Sprinter W907 Battery Terminal Unit Connection Box A9075401805

€28.95

Part no. A2075400740

Fuse Box Mercedes W204 Battery Terminal Control Unit Module A2075400740

€32.95

Part no. A2045400150

Mercedes-Benz C E Class W204 W207 Fuse Distribution Box Interior A2045400150

€23.95

Part no. A2129009908

Mercedes SLK R172 Fuse Box Relay Control Unit SAM Module A2129009908

€127.95

Part no. A1665402950

Mercedes W166 Prefuse Box F32/4 Power Distribution Box A1665402950

€132.95

Part no. A0535450226

Mercedes Sprinter W906 Fuse Box Connector Plug Socket A0535450226

€23.95

Part no. A6395480174

Mercedes-Benz Vito W639 Fuse Box Cooling Outlet Pipe Air Duct A6395480174

€23.95

Part no. A1635400382

Mercedes ML W163 Fuse Relay Box ECU Cover Trim A1635400382

€23.95

Part no. A0009820512

Energy Distributor Mercedes W177 W212 Power Control Unit Module A0009820512

€23.95

Part no. A2475451101

Mercedes C118 W177 C247 Fuse Box Module Cover Cap Trim Housing M282 A2475451101

€32.95

Part no. A2139065706-1

Fuse Box Mercedes W205 W213 Front Engine Compatment Relay Module A2139065706

€51.95

Part no. A4479060400

Mercedes W447 Fuse Relay Box Module Control Unit A4479060400

€61.95

Part no. A1729060105

Mercedes SLK R172 Rear Fuse Box SAM Relay Control Unit Module A1729060105

€89.95

Part no. A9065450003-2

Mercedes Sprinter W906 Fuse Box Cover Trim Panel Lid Grey A6395450003

€23.95

Part no. A2119820302

Mercedes W211 C219 Prefuse Fuse Distribution Box Electric Unit Front A2119820302

€23.95

Part no. A2215402350-1

Mercedes W221 W216 Fuse Box Junction Control Unit Relay Module A2215402350

€28.95

Part no. A0009827403

Mercedes W205 Energy Distributor Power Electrical Control Unit A0009827403

€23.95

Part no. A2059067200-1

Mercedes W205 S205 W213 Fuse Box Front Relay Control Unit Module A2059067200

€28.95

Part no. A2129060017

Mercedes W212 Hybrid Engine Bay Fuse Relay Box Housing A2129060017

€23.95

Part no. A2049060405

Mercedes W204 Front Fuse Board Box Relay Unit Case A2049060405

€23.95

Part no. A2475457300

Mercedes W177 Fuse Box Relay Cover Lid Control Unit Bracket Trim A2475457300

€23.95

Part no. A2055400182

Mercedes W205 W213 C238 C253 Relay Fuse Box Top Cover Lid Cap A2055400182

€23.95

Part no. A9075409682

Mercedes Sprinter W907 W910 Fuse Box Relay Box Fuse Box Module A9075409682

€47.95

Part no. A2059067200

Mercedes W205 S205 W213 Fuse Box Front Relay Control Unit Module A2059067200

€23.95

Part no. A2055463100

Retaining Plate Mercedes W205 Relay Fuse Box Holder Bracket A2055463100

€23.95

Part no. A0025451301

Mercedes W169 W245 W907 W910 Fuse Box Carrier A0025451301

€23.95

Part no. A1695405545

*Mercedes-Benz A-Class W169 Body Control Unit Module SAM A1695405545

€32.95

Part no. A2205400382

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

€28.95

Part no. A0025450601

Mercedes W906 Fuse Relay Box Module Control Unit A0025450601

€28.95

Part no. A1775404107

Mercedes C118 W177 W247 Fuse Box Battery Relay Terminal A1775404107

€70.95

Part no. A2465403803-1

Mercedes W117 W156 W176 W242 W246 Electrical Fuse Relay Box A2465403803

€23.95

Part no. A2129007324

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

€56.95

Part no. A2055402750

Mercedes W205 C253 Hybrid Fuse Control Unit Module Distribution Box A2055402750

€37.95

Part no. A2055400840

Mercedes W205 W238 Fuse Box Cover Control Unit Holder Bracket A2055400840

€23.95

Part no. A1775405931

Mercedes W177 Engine Compartment Power Distribution Fuse Box Unit A1775405931

€99.95

Part no. A2129004611

Mercedes W204 Front SAM Unit Fuse Box Control Power Distribution A2129004611

€99.95

Part no. A2475451001

Mercedes W177 Fuse Box Holder Bracket Support Mount Carrier A2475451001

€23.95

Part no. A2115452601

Mercedes ML W164 Prefuse Fuse Distribution Box Front A2115452601

€23.95

Part no. A1645400750

Mercedes ML W164 Battery Fuse Box Power Distribution A1645400750

€23.95

Part no. A2129005401

Mercedes W207 Fuse Junction Box Relay Control Unit Module SAM A2129005401

€51.95

Part no. A2129060005-1

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

€23.95

Part no. A2129004901

Fuse Box Mercedes W212 Rear SAM Relay Control Unit Module A2129004901

€28.95

Part no. A2036901430

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

€23.95

Part no. A2125406250-1

Mercedes W212 SAM Fuse Prefuse Box Relay Junction Control Unit A2125406250

€56.95

Part no. A2115455232

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

€23.95

Part no. A1779061302

Mercedes EQA H243 W247 Fuse Box Relay Control Unit Module A1779061302

€80.95

Part no. A2139068701-2

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

€23.95

Part no. A2135400200

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

€23.95

Part no. A0005406050

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

€23.95

Part no. A2129003702-1

Mercedes W212 Fuse Box Rear SAM Relay Control Unit Module A2129003702

€23.95

Part no. A1665400224

Mercedes W166 C292 Fuse Relay Box Cover Trim Panel Lid Housing A1665400224

€42.95

Part no. A2465400024-1

Mercedes-Benz W176 W246 W242 Relay Fuse Box Plastic Cover Panel Trim A2465400024

€23.95

Part no. A2055402850

C205 Fuse Box Mercedes C205 Electrical Interior Relay Fuse Socket Control A2055402850

€23.95

Part no. A9065451640

Mercedes-Benz Sprinter W906 Fuse Box Unit Holder Bracket Frame A9065451640

€23.95

Part no. A2465410100

Mercedes W176 W246 Battery Cover Accumulator Trim Panel Lid A2465410100

€23.95

Part no. A0065454601

Energy Distributor Mercedes W204 OM656 Power Control Unit Module A0065454601

€32.95

Part no. A2125400382

Mercedes W212 Cover Fuse Box Trim Panel Lid A2125400382

€23.95

Part no. A2129004711

Mercedes W204 W212 Front Fuse Box Relay Control Unit SAM Module A2129004711

€232.95

Part no. A1645450201

Fuse Box Mercedes ML W164 W251 OM642 Diesel Relay Module Unit A1645450201

€23.95

Part no. A9075409482

Fuse Box Mercedes Sprinter W907 Prefuse Box Module Relay Holder A9075409482

€47.95

Part no. A2045403750

Mercedes W204 SAM Module Control Unit Electrical Fuse Box Unit A2045403750

€89.95

Part no. A2465403803

Mercedes-Benz A-Class W176 Cover Equipment Electrical Fuse Box A2465403803

€23.95

Part no. A1665402450-1

Mercedes ML W166 Fuse Box Front Relay Control Unit Module A1665402450

€28.95

Part no. A2129060605-1

Mercedes W212 Fuse Box Rear Relay Control Unit Electric Module SAM A2129060605

€80.95

Part no. A0009821012

Mercedes W166 W213 C238 Power Distribution Plate Control Unit Module A0009821012

€23.95

Part no. A2129007024

Mercedes CLS C218 Front Fuse Relay Box On Board Supply A2129007024

€75.95

Part no. A2123300135

Mercedes W212 Front Axle Suspension Wishbone Ball Joint Mount A2123300135

€23.95

Part no. A1779069601

Mercedes W177 W247 Fuse Box Front Relay Engine Control Unit Module A1779069601

€42.95

Part no. A2465401350

Fuse Box Mercedes W156 W176 W246 Front Relay Control Unit Module A2465401350

€23.95

Part no. A9065460643

Mercedes Sprinter W906 Fuse Box Relay Bracket Monunt Holder A9065460643

€23.95

Part no. A2129003922

Mercedes W212 Fuse Box Rear SAM Relay Control Unit Module A2129003922

€42.95

Part no. A1669001814

Mercedes W166 SAM Body Control Unit Module Fuse Box A1669001814

€47.95

Part no. A2205401224

Mercedes CL S Class C215 W220 Fuse Box Unit Front Left ECU A2205401224

€28.95

Part no. A1645400624

Mercedes W164 Fuse Box Relay Housing Cover A1645400624

€23.95

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