Mercedes fuel pump relay replacement, made easy
Hassle-free MOT, Service and Car Repair
How much does a fuel pump relay replacement cost for Mercedes cars?
Car model | Fixter price range |
---|---|
Fuel pump relay replacement for Mercedes A Class | £59 - £93 |
Fuel pump relay replacement for Mercedes C Class | £59 - £93 |
Fuel pump relay replacement for Mercedes E-Class | £67 - £105 |
Fuel pump relay replacement for Mercedes GLA | £59 - £93 |
Fuel pump relay replacement for Mercedes B Class | £59 - £93 |
Fuel pump relay replacement for Mercedes C-Class Coupe | £59 - £93 |
Fuel pump relay replacement for Mercedes GLC | £59 - £93 |
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Our expert insights into fuel pump relay replacement
What does a fuel pump relay do?
The fuel pump relay is the electronic component that controls power to the fuel pump. It is found on virtually all vehicles with an internal combustion engine and is often located in the fuse box which can be found in the engine bay.
What are the signs of a bad fuel pump relay?
Below are the top three symptoms that could indicate you need to replace your fuel pump relay:
Poor fuel economy
Trouble starting your car
Poor engine performance - stalling, poor acceleration, rough idling
What happens when we do a fuel pump relay replacement on your car?
Our certified mechanics will:
Inspect the entire fuel system and test it for any issues
They will then locate the fuse box, usually found in the engine bay
If necessary, they will remove the old relay and replace it with a new one
They will they retest the fuel system and check the fuel pump is working
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A fully-insured Fixter driver will pick up your car, whenever and wherever works for you. (If you’d prefer to drive your car to the garage yourself, that’s not a problem!).
Our in-house experts will keep you updated, and your card is only charged once all work has been satisfactorily completed and approved by our team. Your driver will then drop the car back when it’s convenient for you.
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What does a fuel pump relay do?
The fuel pump relay is the electronic switch that controls power to the fuel pump. It is found on virtually all vehicles with an internal combustion engine and is often located in the fuse box which can be found in the engine bay. The fuel pump relay is also responsible for helping your vehicle to start. The relay activates the fuel pump to pressurise the fuel system as you turn the key.
The fuel pump is a small pump which sends the fuel from the tank to the engine. The pump may be mechanically worked by the engine, but on most modern cars it’s electrically-powered. In this case it’s usually found next to or even inside the fuel tank.
This process of pumping fuel from the tank to the engine is essential in the smooth running of your vehicle, therefore a faulty fuel pump relay will cause major performance and drivability issues with your vehicle.
Mercedes-Benz
Mercedes-Benz is a German global car manufacturer and a division of Daimler AG. They were established over 100 years ago in 1926 and have grown to be the biggest selling premium vehicle brand in the world.
How popular is Mercedes in the United Kingdom?
The number of Mercedes cars on the road in the UK continues to rise, reaching 1.9million by the final quarter of 2018. There are almost 5 times as many Mercedes cars on the road as there were in 1995, showing just how popular this marque has grown to be.
Helping these powerful statistics on their way, the Mercedes A-Class was announced as the 8th best selling car in the UK in 2018. The premium family hatchback is vying for position against the ever-popular VW Golf—the current leader in this class.
Premium executive models of every shape and size
Mercedes deliver hatchbacks, saloons, estates and coupés at every size from their A- to E-Class ranges, as well as executive SUVs, the V-Class MPV, and of course, a more than desirable selection of convertibles and roadsters.
With prices rising to well over £100k, Mercedes cars are a great contender as the executive car of choice.
Mercedes-Benz: Giants of Formula One
Mercedes has always been a keen player within the F1 championship, taking their first 2 titles back in 1954 and 1955. Through the 1990s they joined forces with McLaren as an engine provider and part owner, bringing titles for both Mika Häkkinen and Lewis Hamilton and a constructors championship in 1988.
Their current and outright domination of the sport began in 2014, as a team in their own right, it has featured 5 straight constructors titles, with Lewis Hamilton taking 4 world championships and Nico Rosberg taking the other in 2016.
How often should a fuel pump relay need replacing?
There is no set lifespan of a fuel pump relay, however the relay is designed to last the life of the car, but due to its constant use and the high temperatures it is exposed to, it will not usually last that long. Over time, the fuel pump relay may begin to show signs of wear and will have to be replaced.
The most commonly damaged portions of the fuel pump relay that tend to malfunction first are the coil and contact points. Usually, these parts of the relay will begin to oxidise and rust over time.
The law, vehicle regulations and your MOT
If the fuel system is not working properly, this may result in an MOT fail. Similarly, if a failing fuel pump relay has caused your check engine light to illuminate, this could lead to an advisory or failure.
What causes a fuel pump relay to break?
The fuel pump relay can fail for many reasons, from dust to electrical power surges, or a blown fuse to a fault in the pump. Many things can affect the functionality of the fuel pump relay.
What are the signs of a failing fuel pump relay?
Usually, there a few signs you can look for:
Poor fuel economy
Trouble starting your car
Poor engine performance - stalling, poor acceleration, rough idling
Check engine light
Car stops whilst driving
How often should you replace your fuel pump relay?
There is typically no maintenance schedule for fuel pump relay replacement. However, it may not be a bad idea to replace the fuel pump and the relay on an older, high mileage vehicle. Regularly maintaining small components such as the fuel pump relay could save you costly repair bills down the line.
What happens during a fuel pump relay replacement?
During the repair our certified mechanics will:
Inspect the entire fuel system and test it for any issues
They will then locate the fuse box, usually found in the engine bay
If necessary, they will remove the old relay and replace it with a new one
They will they retest the fuel system and check the fuel pump is working
What is the average life of a fuel pump relay?
There is no set lifespan of a fuel pump relay, however over time, the fuel pump relay can begin to show signs of wear and will have to be replaced. The fuel pump relay is designed to last the life of the car, but due to its constant use and the high temperatures it is exposed to, it will not usually last that long.
The most commonly damaged portions of the fuel pump relay that tend to malfunction first are the coil and contact points. Usually, these parts of the relay will begin to oxidise and rust over time.
Can you drive with a broken fuel pump relay?
It is best to avoid driving with a failing fuel pump relay. If the fuel pump relay has an issue, power may be randomly cut off to the fuel pump, which will cause the engine to stall whilst driving. Problems with your fuel pump relay will also result in frequent stalling and poor fuel economy, problems which are inconvenient and costly. It’s always best to have a faulty fuel pump relay checked as soon as possible to avoid these issues.
What happens if you don't change the fuel pump relay?
If the fuel pump relay has an issue, power may be randomly cut off to the fuel pump, which will cause the engine to stall whilst driving. Problems with the relay may also result in frequent stalling and poor fuel economy, which are both inconvenient and costly.
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