Mercedes-Benz C55 AMG 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

(9)

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

(9)

Fuel Injector Replacement Service

How much does a Fuel Injector Replacement cost?

On average, the cost for a Mercedes-Benz C55 AMG Fuel Injector Replacement is $1468 with $1269 for parts and $199 for labor. Prices may vary depending on your location.

CarServiceEstimateShop/Dealer Price
2005 Mercedes-Benz C55 AMGV8-5.5LService typeFuel Injector ReplacementEstimate$2778.50Shop/Dealer Price$3465.26 - $5407.41
2006 Mercedes-Benz C55 AMGV8-5.5LService typeFuel Injector ReplacementEstimate$2736.50Shop/Dealer Price$3423.35 - $5365.57
Show example Mercedes-Benz C55 AMG 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

(9)

Rating Summary
9
0
0
0
0
9
0
0
0
0

Damian

11 years of experience
465 reviews
Damian
11 years of experience
Mercedes-Benz C55 AMG V8-5.5L - Trunk Latch Adjustment - Washington, District of Columbia
Great job, excellent customer service.

Harish

27 years of experience
588 reviews
Harish
27 years of experience
Mercedes-Benz C55 AMG V8-5.5L - Brake Light Bulb Replacement (Driver Side) - Charlotte, North Carolina
Best mechanic ever he gets the job done and fast

David

16 years of experience
635 reviews
David
16 years of experience
Mercedes-Benz C55 AMG V8-5.5L - Oil Change - Concord, California
Was very informative of my cars problems. Was wuick with the service and very professional. Wiuld highly recomend for any job.

Dan

39 years of experience
975 reviews
Dan
39 years of experience
Mercedes-Benz C55 AMG V8-5.5L - Pre-purchase Car Inspection - Oakwood, Georgia
Shot straight with me. Highly recommended.

Excellent Rating

(9)

Rating Summary
9
0
0
0
0
9
0
0
0
0
Number of Mercedes-Benz C55 AMG services completed
99+
services done by our mechanics
TOTAL NUMBER OF EXPERT Mercedes-Benz MECHANICS
1100+
experts on our platform

Recent articles & questions

The Best Used Cars to Buy If You Have Kids
Once Once you have kids, the kind of car you have becomes very important. Suddenly, the amount of space, entertainment features, reliability, safety, and easy to clean interior become the top priorities. Here’s a list of vehicles meant to satisfy...
How to Buy a Classic Car
Some things truly do get better with age, and a classic car in good condition is one example. There’s a reason why a car is considered a classic, and it has a lot to do with it having a time-tested...
B1336 OBD-II Trouble Code: Door Ajar Right Rear Circuit Open
B1336 means there is an error with the door ajar right rear circuit, likely due to a faulty door ajar switch or circuit, or defective door latch.

USB port in armrest compartment not working

Having a failing or non-working USB port in your Infinity is actually a problem I have seen in many vehicles throughout my years. In most of those cases what I recommend first is plugging in a different USB cord and...

i have a 50 cc scooter the engine won't start after i mess around with the idle

It is possible that you could have flooded the carb when you adjusted the air/fuel screw. I would keep the screw where it is at and let the scooter sit for a while to let the fuel disperse. Once the...

I have a 1995 Lincoln Towncar which won't turn all the way off.

The ignition switch is a darned good place to start. A 1995 car should be pretty straightforward electrically. There may be one or two power relays that could be suspect. The only way to tell for sure is a point...

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