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Mercedes cars are well-designed in that they think preventively when putting their cars together. One of the most important components of your Mercedes that promotes optimal vehicle functioning is the fuel system, which can become easily compromised by debris and filth, and if these particles make it all the way to your engine it can cause serious damage and performance problems. In this article, we’ll talk about the fuel tank screen filter that Mercedes-Benz so thoughtfully designed to best prevent fuel contamination, including signs of clogs you should be aware of and how to properly maintain the filter.

What is the purpose of the fuel tank screen filter?

Your Mercedes, namely the W123 is equipped with numerous fuel filtration components so that the fuel entering the engine is completely free of contaminates or other particulate that can lead to engine failure or serious performance problems. Besides the fuel tank screen filter, the system also includes a few other filters, such as the pre-filter and a regular fuel filter that most vehicles are equipped with standardly. The purpose of this third filter that the manufacturer added is to catch the larger contaminates that could wind up clogging the subsequent filters down the line.

Signs of a clogged fuel tank screen filter

Although the design of this additional fuel tank screen filter has excellent intention, it can become clogged just like other fuel screens and filters – especially because it’s designed to catch larger particles preemptively (larger particles will make a screen/filter clog in a shorter period of time). It’s important to be aware of the signs of a clogged fuel tank screen filter. These are the most common ones:

  • Check-engine light illumination
  • Difficulty starting the car
  • Engine misfiring
  • Power decrease
  • A struggling fuel pump

A clogged fuel filter will significantly impede the flow of fuel to your engine that it requires for ignition and combustion. This is likely what’s going on when your fuel filter becomes clogged:

  • Fuel flow is significantly diminished
  • Lowers the amount of fuel making it into your fuel tank
  • Fuel flow is completely impeded – your car won’t start or drive anywhere

How to fix the problem

Since the symptoms of a clogged fuel filter could indicate a problem with another area of the fuel system, it’s important to initially and correctly diagnose the problem as an issue with the fuel filter. In order to fix the issue, you may need to clean or replace the filter all together. Since the fuel filters in this model Mercedes are usually sturdy and durable parts, they just become clogged from time-to-time, a sufficient cleaning often does the job; however, if the filter is beyond cleaning or has become damaged or corroded somehow, it should be replaced immediately to resume normal engine functioning.

What you can do to prevent clogging

Since we know that this model Mercedes has an added fuel tank screen filter, it’s important to know what you can do to prevent it from clogging – or to prevent any of the filters from clogging for that matter; if any of the filters clog it will produce similar symptoms. Preventive care is important in order to maintain your car’s functioning at all times, so here are a few things you should consider:

  • Get the help of a Mercedes specialist for ongoing maintenance and servicing
  • Have your specialist perform routine inspections of the fuel system components, including the filters and fuel pump
  • Use the right type of gasoline your car requires (this can be found in your owner’s manual)
  • Also in your owner’s manual, follow your recommended maintenance schedule
  • If you notice any of the aforementioned symptoms of a clogged fuel screen in your own car, bring it to your specialist right away for assessment

How we can help you

Mercedes Emblem Logo At St. Matthews Imports in Louisville, KY, we proudly service and maintain countless Mercedes-Benz cars in the area. Our clients continue to bring their vehicles to our Hubbards Lane location for servicing because we believe in providing honest, accurate, specialized, and affordable automotive services to our community. If you’ve recently experienced the signs of a clogged fuel filter, please contact us right away to take a look at your Mercedes – we look forward to restoring it back to its original greatness.

* Mercedes Emblem Logo image credit goes to: THEPALMER.

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