Mercedes-Benz C-Class W204 Fuse Diagrams And Commonly Blown Fuses

Mercedes-Benz C-Class W204 Fuse Diagrams And Commonly Blown Fuses

Sunroof, seat heaters, wipers, sound system, lights are all of the electrical features of your car, which are powered with electricity made by the alternator and stored in the battery. Power supply wires from the positive battery terminal conduct electrical current to each component, and each component is then bonded to the chassis by a short length of grounding wire that is screwed into the frame nearby. To complete the electrical circuit, the entire chassis serves as the return path to the battery, and is connected to the negative battery terminal by a short length of thick ground wire in the engine compartment. Each power supply wire is controlled by a switch and a fuse. In normal use, the fuse is intact. The current flows through the full circuit, and you use the switch to turn on or off the component. When faulted, the fault allows too much current to flow through a shortened circuit, creating excess heat and melting the thin connector inside the fuse. The fuse "blows," and shuts off current much faster than you can turn off the switch.

Some faults can happen inside the component. The wiring may be fine, but bad connections in a window motor or control board may cause the short circuit and a blown fuse. In older cars, the power wire itself may work loose and chafe on the chassis. The wire insulation wears off, and the bare wire contacts the chassis, completing the short circuit back to the battery and blowing the fuse. Because the wire is loose, this short circuit can come and go. The electric current that a component uses is measured in amperes (amps for short). Your wiper motor does more work and uses more amps than the tire pressure monitor. So the wiper motor needs a 30 amp fuse, while the tire pressure monitor uses only a 5 amp fuse. In both cases, in the event of a short circuit the properly rated fuse will blow. Always use the proper fuse.

Auto fuses are marked and color coded (Figure 3). The two common sizes (regular ATC and mini ATM) are available at auto parts stores. Use the fuse puller to remove fuses without damage. To check a fuse, simply look at the U-shaped connector. If the connector is melted through, the fuse is blown. There are three fuse boxes; located in the engine compartment, trunk and cabin as shown above. Use the Fuse Diagram found with the fuses, or attached below, to determine fuse location and amperage. Note: US spec models may have no fuses in the left-side instrument panel. Find a bad fuse by checking continuity with a multi-meter. Ensure the ignition is OFF. Test each fuse by placing the leads in the fuse test ports as shown. If the fuse is good, the continuity tone will sound and resistance will be zero. A blown fuse will show infinite resistance with no tone. Use the Mercedes fuse allocation chart to locate a specific fuse and amperage. 17, rated at 30 amps and located in the under hood box. How Many Times Can I Replace the Same Fuse If It Keeps Blowing? Replace the fuse once. If it blows again, there is a fault on that circuit that must be tracked down. A 15 Amp Fuse is Blown and the Only Spare I Have is a 30 Amp. Can I Put a Higher Amp Fuse in Place of the Rated Fuse? The fuse is rated to blow before overheating causes problems. The higher rated fuse will continue to carry current on overheated wiring, which could severely damage components or start a fire. I Can't Seem to Find My Fuse Guide. Where Might it Be?

You can start the engine by placing your smartphones in a wireless charging or smartphone tray. Those are just two examples of all the tech offerings that BMW has for the all-new 3Series. That鈥檚 on top of all the safety tech features that are commonplace among Bimmers these days. Likewise, the 2019 Mercedes C-Class comes with its own tray table of technological offerings. Programs like Active Distance Assist Distronic system, Active Lane Change Assist, Active Emergency Stop Assist, and Active Steering Assist are available in the C-Class. Active Brake Assist, for example, comes as standard on the sedan. The C-Class also has a Car-to-X communication warning system, real-time weather info, parking info, a Qi wireless device charging system, and a lot more. Essentially, both the all-new BMW 3 Series and the 2019 Mercedes C-Class score with flying colors in this department. You can choose one over the other and still feel good about your choice.

As two of the most popular models in its segment, the BMW 3 Series and the Mercedes C-Class are expected to have more than one engine to satisfy the demands of their respective clientele. Having multiple engine options lets prospective owners choose which suits them best. That鈥檚 why in both cases, there are plenty of engines to choose from. The 2.0-liter turbocharged diesel unit, for example, gets an increased output of 187 horsepower and 295 pound-feet of torque compared to the previous model. It鈥檚 not much of an increase, but it鈥檚 enough for BMW鈥檚 standards. Hopefully, it鈥檚 the same for would-be customers. The all-new 3 Series also has gas-powered engines on the table. One of them is a 2.0-liter turbocharged four-cylinder unit that produces 254 horsepower and 258 pound-feet of torque. More engine options are expected to be available once the full 3 Series lineup arrives. Variety is the name of the game here, and just like BMW, Mercedes came to play.