Mercedes-Benz 300E Fuel Pump Relay Replacement Costs

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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 300E Fuel Pump Relay Replacement is $202 with $107 for parts and $95 for labor. Prices may vary depending on your location.

Car	Service	Estimate	Shop/Dealer Price
1988 Mercedes-Benz 300EL6-3.0L	Service typeFuel Pump Relay Replacement	Estimate$328.77	Shop/Dealer Price$399.72 - $573.18
1990 Mercedes-Benz 300EL6-3.0L	Service typeFuel Pump Relay Replacement	Estimate$319.49	Shop/Dealer Price$393.15 - $574.67
1990 Mercedes-Benz 300EL6-2.6L	Service typeFuel Pump Relay Replacement	Estimate$892.69	Shop/Dealer Price$1109.65 - $1721.07
1992 Mercedes-Benz 300EL6-3.0L	Service typeFuel Pump Relay Replacement	Estimate$319.49	Shop/Dealer Price$393.11 - $574.60
1989 Mercedes-Benz 300EL6-3.0L	Service typeFuel Pump Relay Replacement	Estimate$308.77	Shop/Dealer Price$379.77 - $553.28
1991 Mercedes-Benz 300EL6-2.6L	Service typeFuel Pump Relay Replacement	Estimate$892.69	Shop/Dealer Price$1109.65 - $1721.07
1986 Mercedes-Benz 300EL6-3.0L	Service typeFuel Pump Relay Replacement	Estimate$313.77	Shop/Dealer Price$384.51 - $557.81
1993 Mercedes-Benz 300EL6-3.0L	Service typeFuel Pump Relay Replacement	Estimate$897.69	Shop/Dealer Price$1115.06 - $1726.79

Show example Mercedes-Benz 300E 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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James

12 years of experience

233 reviews

James

12 years of experience

by Katy

Mercedes-Benz 300E L6-3.2L - Battery - San Francisco, California

Was given a "fixed price" for two services, one was completed but the other was not because the price for egr valve jumped significantly. In conversations with company reps I was not satisfied with their explanation of "fixed price" being only in regards to service charge as the website does not state that, it stated that there will be "no surprises, fixed price for services requested..." I feel there was false advertising. the battery was installed as part two of the service before being informed of the price hike so I wound up paying for that and not getting the main service completed. had the higher price been given initially I would not have booked the service at all.

Grzegorz

41 years of experience

473 reviews

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Grzegorz

41 years of experience

Request Grzegorz

by Fred

Mercedes-Benz 300E L6-2.6L - Oil Change - Daly City, California

Grzegorz Kilon arrived 35 minutes late. When he arrived, he did not have the filter. He came back 10:35 AM from the supposedly 9 AM appointment. Would have avoided the delay if he had it in the beginning. Also, PENZOIL was indicated that was used in receipt. He used an O'Reilly brand oil.

Augie

31 years of experience

263 reviews

Augie

31 years of experience

by Kayvan

Mercedes-Benz 300E L6-2.8L - Valve Cover Gasket Replacement - Pasadena, California

On time and finished before the estimated time and very knowledgeable and honest mechanic , I had no stress and my car works perfectly . Highly recommended.

Terry

30 years of experience

223 reviews

Terry

30 years of experience

by Derek

Mercedes-Benz 300E L6-3.0L - Pre-purchase Car Inspection - Chandler, Arizona

Told me what was wrong with my car, end recommended a way to save a lot of money. Really appreciate it.

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