Mercedes-Benz R500 Fuel Pump Relay Replacement at your home or office.

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Fuel Pump Relay Replacement Service

How much does a Fuel Pump Relay Replacement cost?

On average, the cost for a Mercedes-Benz R500 Fuel Pump Relay Replacement is $118 with $23 for parts and $95 for labor. Prices may vary depending on your location.

CarServiceEstimateShop/Dealer Price
2006 Mercedes-Benz R500V8-5.0LService typeFuel Pump Relay ReplacementEstimate$160.55Shop/Dealer Price$189.44 - $236.74
2007 Mercedes-Benz R500V8-5.0LService typeFuel Pump Relay ReplacementEstimate$140.55Shop/Dealer Price$169.47 - $216.79
Show example Mercedes-Benz R500 Fuel Pump Relay Replacement prices

What is the Fuel Pump Relay all about?

Every time you turn on the ignition of your car, you activate the fuel pump relay. This device sends an electric current to the fuel pump. Upon receiving this current, the fuel pump sends gasoline to the engine and the car starts running. While the fuel pump is active as long as the car engine is running, the fuel pump relay works only at startup and when you turn off the ignition. As long as the car is running, the fuel pump runs on the power it receives from the oil pressure sending unit or any other such power source.

The fuel pump relay is also called the relay switch and its functions are similar to those of the automotive fuse. Controlled by the engine control module, the fuel pump relay controls the current sent to the fuel pump. This device is a black plastic component, set in a small box with a wiring harness attached to its underside. Its sprockets attach to the engine assembly. Depending on the make of the car, you will find the fuel pump relay under the hood or under the dashboard, near the steering wheel of the car.

Keep in mind:

  • Fuel relay pumps can oxidize or rust and need to be changed more frequently that the fuel pump.
  • Typically, the coil and contact points of the fuel pump relay show damage.

How it's done:

  • The vehicle hood is raised and supported
  • The defective fuel pump relay is removed
  • The new fuel pump relay is installed
  • The fuel pressure is tested and codes cleared with a scanner or gauge
  • The vehicle hood is closed and road tested for proper operation

Our recommendation:

The fuel pump of the car is an expensive device that functions well with the optimal amount of current. If it receives excessive power, the wiring system around the pump overheats, and the fuel pump could get damaged or fail completely. The fuel pump relay has a limited lifetime so you should have our expert mechanics check it every time your brakes are changed.

What common symptoms indicate you may need to replace the Fuel Pump Relay?

  • Engine cranks but does not start at all.
  • Engine functions irregularly and does not start right away
  • Car slows down without your braking
  • Car comes to a halt after running only for a short distance

How important is this service?

If the fuel pump relay does not work properly, it will not activate the fuel pump and you car will not start. Further, a malfunctioning fuel pump relay could conduct too much power to the fuel pump and cause damage to or ruin it completely. This is why we recommend that you keep the fuel pump relay in perfect working order at all times.

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Jay

37 years of experience
953 reviews
Jay
37 years of experience
Mercedes-Benz R500 V8-5.0L - Battery - San Jacinto, California
Very professional and quick!

Rudy

36 years of experience
30 reviews
Rudy
36 years of experience
Mercedes-Benz R500 V8-5.0L - Oil Change - Houston, Texas
This guys has been working as Mercedes Benz mechanic for 18 years. Still does. Knowledgeable person and courteous.

Dellano

18 years of experience
515 reviews
Dellano
18 years of experience
Mercedes-Benz R500 V8-5.0L - Car is not starting - Hyattsville, Maryland
Dellano made the necessary checks to the car and determined that the reason for the battery drainage is due to a lack of driving

Richard

11 years of experience
450 reviews
Richard
11 years of experience
Mercedes-Benz R500 V8-5.0L - Tune-up - Clinton, Maryland
Wonderfu, he was informative, skewered all questions and was very professional. I will definitely be using him again.

Excellent Rating

(12)

Rating Summary
11
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1
11
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Number of Mercedes-Benz R500 services completed
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