Mercedes-Benz CLS550 Fuel Injector Replacement at your home or office.

Our mobile mechanics offer services 7 days a week. Upfront and transparent pricing.

Estimate price near me

Service Location

Customer Ratings

(86)

Included for free with this service

Online Booking

Mechanic comes to you

12-month / 12k-mile warranty

Free 50 point safety inspection

Our certified mobile mechanics can come to your home or office 7 days a week between 7 AM and 9 PM.

Customer Ratings

(86)

Fuel Injector Replacement Service

How much does a Fuel Injector Replacement cost?

On average, the cost for a Mercedes-Benz CLS550 Fuel Injector Replacement is $1298 with $990 for parts and $308 for labor. Prices may vary depending on your location.

CarServiceEstimateShop/Dealer Price
2013 Mercedes-Benz CLS550V8-4.7L TurboService typeFuel Injector ReplacementEstimate$6973.40Shop/Dealer Price$8618.33 - $13530.44
2008 Mercedes-Benz CLS550V8-5.5LService typeFuel Injector ReplacementEstimate$2303.80Shop/Dealer Price$2806.51 - $4298.77
2011 Mercedes-Benz CLS550V8-5.5LService typeFuel Injector ReplacementEstimate$2300.50Shop/Dealer Price$2802.49 - $4292.34
2009 Mercedes-Benz CLS550V8-5.5LService typeFuel Injector ReplacementEstimate$2300.50Shop/Dealer Price$2802.48 - $4292.33
2014 Mercedes-Benz CLS550V8-4.7L TurboService typeFuel Injector ReplacementEstimate$6948.17Shop/Dealer Price$8592.35 - $13503.89
2007 Mercedes-Benz CLS550V8-5.5LService typeFuel Injector ReplacementEstimate$2303.80Shop/Dealer Price$2807.15 - $4299.88
2010 Mercedes-Benz CLS550V8-5.5LService typeFuel Injector ReplacementEstimate$2300.50Shop/Dealer Price$2802.54 - $4292.44
2012 Mercedes-Benz CLS550V8-4.7L TurboService typeFuel Injector ReplacementEstimate$6948.17Shop/Dealer Price$8588.22 - $13496.67
Show example Mercedes-Benz CLS550 Fuel Injector Replacement prices

What is a fuel injector and how does it work?

A fuel injector is a fuel metering device that sprays atomized droplets of fuel in a specific pattern into the engine’s intake manifold or directly into the combustion chamber. The injector has a solenoid and valve within and the operation, or pulsing, of the solenoid is controlled by the powertrain control module (PCM). The PCM controls the solenoid’s “on” time in order to keep the air-fuel ratio optimized while the engine load and operating conditions constantly change. Fuel injectors are usually connected to a fuel rail located on the top of the engine and the fuel rail, in turn, is supplied with fuel under pressure from the fuel pump located in the fuel tank.

When to consider replacing a fuel injector:

  • Rough idle, loss of power, or misfiring. Poor engine operation has many causes but faults in the fuel injection system, including the fuel injectors, are high on the list of possibilities.
  • Odor of raw gas or visible leaks. Fuel injectors should not leak fuel into the intake manifold when the car is off. If you notice any fuel odor around your car, the possibility of a leaking fuel injector should be considered. There should be no external leak from a fuel injector. If an externally-leaking injector is suspected, do not start your car due to the fire hazard.
  • Check engine light. Some fuel injection failures, for example, a faulty solenoid, may cause a trouble code to be set in the PCM and that will cause the check engine light to illuminate. The codes are read and the fuel injector is tested directly, as needed.
  • Major engine repairs, engine replacement, or lengthy storage. All fuel injectors will have deposits given enough mileage. These deposits can cause an imbalance in the performance of the injectors from cylinder to cylinder. When an engine is already disassembled, or if you are installing a new engine, that is a perfect time to service the injectors as a set. All injectors have tiny internal filter baskets. A professional injector service facility will clean each injector ultrasonically and replace these filters for a relatively low cost.

How do mechanics replace a fuel injector?

Injectors can be serviced once removed from the car or replaced outright with new injectors. If the injectors are serviced, specialized cleaning and test equipment are required. The choice to repair versus replace will depend on exactly what is wrong with the injector as well as customer preference. Either option requires removing the injector from the car and the following procedure is typical:

  • Once the engine is cold, the pressure within the fuel rail is relieved by briefly running the engine with the fuel pump fuse out.
  • The upper plenum on the intake manifold is removed along with any cables, hoses, or wiring that restricts access.
  • The supply and return lines are removed from the fuel rail. The electrical connectors to each fuel injector are unlocked and removed. The fuel rail is then unbolted and removed from the intake manifold.
  • The injector(s) requiring replacement are removed from the fuel rail, taking care to not allow any debris to enter the exposed openings. An O-ring seal usually holds the injector very firmly in a finely polished bore in the fuel rail.
  • Using a new O-ring, the serviced or replaced injector is re-inserted into the fuel rail — using engine oil on the O-ring to prevent damaging it. O-rings in this application fit very tight to prevent fuel leaks.
  • The fuel rail is re-installed and the supply and return lines are re-connected. The plenum is re-installed along with all cables, hoses, or wiring.
  • Finally, the engine is run, there is a careful check for leaks, and the vehicle is road tested.

Is it safe to drive with a fuel injector problem?

Yes, so long as there is no external leak of fuel from a broken or malfunctioning injector, it is safe to drive the car. However, if the injector is known to be malfunctioning, it can cause engine misfires, excessive emissions or, in the case of a badly leaking injector, can overload and overheat the catalytic converter. Additionally, fuel efficiency will always be diminished if the fuel injectors are not working properly.

When replacing a fuel injector keep in mind:

  • Using high quality (Tier One) gasoline may reduce deposits on fuel injectors and prolong their life.
  • If an injector problem develops that requires removal of one injector, the best practice is to remove and service all of the injectors at the same time. That service might involve replacement of the electrically failed injector along with off-the-car cleaning of the remaining injectors. Serving all injectors at once ensures the injector set will be balanced, in terms of flow rates, and in turn promote smooth operation of the engine.
  • Do not use fuel system cleaning compounds, or procedures, unless such materials are specified by the manufacturer of your car.
  • On the car cleaning of fuel injectors is not as effective as off-the-car cleaning because injectors have tiny internal filter baskets that should be replaced as part of the process of servicing a fuel injector.

Fast and easy service at your home or office

Backed by 12-month, 12.000-mile guarantee


Meet some of our expert Mercedes-Benz mechanics

Real customer reviews from Mercedes-Benz owners like you.

Excellent Rating

(86)

Rating Summary
77
2
1
2
4
77
2
1
2
4

Rafael

28 years of experience
77 reviews
Rafael
28 years of experience
Mercedes-Benz CLS550 V8-4.6L Turbo - Battery - San Pablo, California
Rafael was outstanding, very informative, knowledgeable and I would recommend him to my family, friends.

Charles

35 years of experience
342 reviews
Charles
35 years of experience
Mercedes-Benz CLS550 V8-5.5L - Oil Change - Pflugerville, Texas
Service was just as expected, gave me an approximate time to get the job done and met that time and everything was clean when finished. Definitely will be using this service from now on

Alfred

14 years of experience
587 reviews
Alfred
14 years of experience
Mercedes-Benz CLS550 V8-4.6L Turbo - Oil Change - San Francisco, California
Alfred arrived on time, did an excellent job, was very efficient and professional.

Jason

33 years of experience
617 reviews
Jason
33 years of experience
Mercedes-Benz CLS550 V8-5.5L - Check Engine Light is on Inspection - San Jose, California
Jason is the best. He's very knowledgable and answered all my questions.

Excellent Rating

(86)

Rating Summary
77
2
1
2
4
77
2
1
2
4
Number of Mercedes-Benz CLS550 services completed
946+
services done by our mechanics
TOTAL NUMBER OF EXPERT Mercedes-Benz MECHANICS
1100+
experts on our platform

Recent articles & questions

How to Get the Best Fuel Mileage For Your Car
Fuel economy can be increased if you perform regular car maintenance, pay attention to the Check Engine Light, and reduce your idling time.
How to Buy Good Quality Struts
Vehicle Vehicle struts serve a number of different purposes, including adding control to extreme handling conditions such as sudden turning and braking. They also serve to provide a level of comfort to passengers in the vehicle as they provide a...
How to Replace a Lost or Stolen Car Title in New York
Do Do you have plans of selling your car in the future? What about transferring ownership, perhaps passing it over to one of your kids when they turn 16? In order to do either of these you’ll need to have...

How to reset limp mode on a 1997 Range Rover

It's difficult to say without knowing what the exact code is, but if you are dealing with an OBD II code, which is the universal system that started up in '96, It can be reset by any of the inexpensive...

Which oil should I put in?

After checking the oil specifications for your engine you are correct about the 5w20 weight oil. Newer engines in a lot of vehicles now use and recommend the 5w20 or 0w20 oils. Your vehicles engine uses 5W20 only. The parts...

Car is grinding after driving a distance but nothing wrong with brakes ?

Hi there. It sounds like it could either axle or wheel bearing related. Low lubricant in either of these can create what your experiencing once heated up during use. A visual inspection of the axle boots may help in identifying...

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1 (855) 347-2779 · hi@yourmechanic.com