Need Assistance? (Se Habla Espanol) Call or Chat Online

Select by Brand

Get Email Exclusives

Sign up for email updates on the latest exclusive offers

Mercedes Benz SL500 Fuel Pump

Four Trouble Signs of a Failing Mercedes Benz SL500 Fuel Pump

It's kind of funny when you realize that a car as advanced and luxurious as a Mercedes Benz SL500 can be rendered non-functional by a part as simple and as humble as a fuel pump. It's true, though, without the fuel pump to shunt valuable fuel to your engine, you might as well have owned an overpriced lawn ornament. Most people don't realize it but it's actually easy to spot a fuel pump that's close to failing. All you have to do is watch out for these four symptoms, and you will always be fore-warned.

Intermittent operation

One thing you will notice when your pump has failed or is in the process of failing is that, after a few miles of normal driving, the SL500 starts to sputter. It's critical that, if you are using this as a test, to let the engine idle for twenty minutes or so-sometimes overheating can be the cause in older vehicles. If it happens to a relatively new one, however, the fuel pump is likely at fault.

Screeching engine

You have to be very attentive with this symptom because it only occurs when the engine is first engaged. The sound will be terribly annoying and loud. This results from the engine being starved of fuel in the case of a malfunctioning fuel pump.

No-go starts

If, from the get go, your vehicle doesn't want to start, and you've eliminated the chance of it being caused by the battery and ignition, then the fuel pump is the logical culprit responsible for the failure. That's because fuel-coupled with electrical discharge-are essential for starting and acceleration. Without a working fuel pump, no fuel gets shunted to the engine.

Misfiring at normal speeds

Again, this is due to the lack of fuel in the engine due to the inability of the fuel pump to deliver. This is one of the more dangerous of the symptoms, and can potentially cause a very nasty accident. If you manage to observe all symptoms given and still reach this point, then the problem with the fuel pump is a lot more serious than what you imagine.

What to do?

It's actually better to replace the entire fuel pump rather that attempt repairs that leave the entire pump vulnerable and much less durable.

Mercedes Benz SL500 Fuel Pump Bestsellers View more

  • Keeping Your Mercedes Benz SL500 Fuel Pump in Tip-Top Shape

    It's easy to overlook the little things in something as classy as the Mercedes Benz SL500-the fuel pump is one of those essential components that few people think about. In fact, odds are, you've the only time you ever thought about it is when it actually failed-and when that happens, you'll go nowhere real fast. The real trick is to head off the problem before it becomes a problem. Here are a few things you can do to make sure that the pump keeps on pumping.

    • Look it over
    • The fuel pump on the Mercedes Benz SL500 is located under the rear seat, and is of the more modern electrical variety. That makes it, in a sense easier to maintain because all the parts are handily enclosed in one huge housing with less moving parts than the older mechanical variety. When looking over the fuel pump, check the very vulnerable screws that attach it in place as well as the metal attachments-because these tend to bend and vulnerable. After that, the next thing to look over is the shell-check for cracks and other signs of damage.
    • Clean it often
    • Cleaning when it comes to the fuel pump is as simple as wiping the housing down with a moist sponge. It is a very bad idea to use cleaning solutions and a lot of water as those will definitely seep into the housing and fry the circuitry within. The trick is to be very gentle in cleaning the housing-take extra care with the attachment points for the inlet/outlet hoses. Any liquids that seep into the pump can contaminate the fuel. Rough movements might also end up damaging these connected hoses. While you're there, take time to also check if the hoses are-in fact-securely attached.
    • One other tip
    • The last thing you can do is to include it in the checklist if you regularly bring your car to a shop for a thorough maintenance check-up. This will save you the trouble of actively thinking about it.