Mercedes-Benz R550 Ignition Coil Replacement at your home or office.

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Ignition Coil Replacement Service

How much does a Ignition Coil Replacement cost?

On average, the cost for a Mercedes-Benz R550 Ignition Coil Replacement is $149 with $54 for parts and $95 for labor. Prices may vary depending on your location.

CarServiceEstimateShop/Dealer Price
2008 Mercedes-Benz R550V8-5.5LService typeIgnition Coil ReplacementEstimate$222.57Shop/Dealer Price$266.97 - $360.78
Show example Mercedes-Benz R550 Ignition Coil Replacement prices

What is an ignition coil and how does it work?

An ignition coil transforms ignition voltage (12 volts) to the very high voltage pulses (20,000 volts or more) that fire the spark plugs. The number of ignition coils varies depending on car model and year of production. Older cars will have one coil covering all engine cylinders while newer cars may have a coil-on-plug type arrangement — that is every cylinder will have its own dedicated ignition coil.

Ignition Coils

When to consider replacing an ignition coil:

  • Hard starting or no start. Ignition coils are subject to heat damage and electrical overload, both of which can cause partial or total failure. If the coil is faulty, you may have difficulty starting your car or it may not start at all.
  • Misfiring, loss of power, poor acceleration. Once the car is running, a bad ignition coil can cause poor operation of the engine. Should you have misfiring or loss of power, faulty ignition coils would be among the list of causes a mechanic would investigate. The Check Engine Light will often come on with a trouble code(s) indicating which cylinders are involved.

How do mechanics replace the ignition coil?

  • The ignition is checked to assure it is in the “off” position.
  • For single coils that supply all cylinders, the coil is disconnected from either a bracket located in the engine compartment or, in some cases, is removed from within the distributor. The replacement coil is secured and all electrical connections reattached. If the distributor was removed for any reason, the timing is adjusted as required.
  • For individual coil-on-plug applications, the coil is detached from the top of the individual spark plug and replaced.
  • Once the coil is securely in place, all electrical connections are reattached, and timing adjusted as needed, the car is road tested to ensure normal operation.

Is it safe to drive with an ignition coil problem?

Yes. A malfunctioning ignition coil will cause loss of power and lower fuel efficiency but that will not present an immediate safety issue. If the coil malfunction is causing misfiring, this will allow unburned fuel to enter and permanently damage the catalytic converter from overheating.

When replacing an ignition coil keep in mind:

  • Ignition coil failure can be caused by faulty spark plugs or wires. The mechanic will inspect and may recommend replacement of those components.
  • In a coil-on-plug ignition system, if only one coil fails, you need only replace the faulty coil. Remaining functioning coils can be left in place.
  • In systems with the coil located in the distributor, it may be more cost-effective to replace the entire distributor rather than remove and replace just the coil.

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Meet some of our expert Mercedes-Benz mechanics

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Excellent Rating

(43)

Rating Summary
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Andrew

11 years of experience
337 reviews
Andrew
11 years of experience
Mercedes-Benz SLK230 L4-2.3L Turbo - Ignition Coil - Baltimore, Maryland
Great job. Fast and efficient

Patrick

33 years of experience
1408 reviews
Patrick
33 years of experience
Mercedes-Benz C230 L4-2.3L Turbo - Ignition Coil - Austin, Texas
I trust this guy to work on my car anytime and also I feel comfortable referring him to people. Both appointments he had been on time or early. Easy to talk to and very knowledgeable.

Collins

12 years of experience
488 reviews
Collins
12 years of experience
Mercedes-Benz ML430 V8-4.3L - Ignition Coil - Kennesaw, Georgia
COLLINS was very knowledgeable and worked hard on fixing my car which is now running GREAT!!! I have more work I need to book with YourMechanic and I would like to request COLLINS for all duture work!!!!!

Ryan

16 years of experience
21 reviews
Ryan
16 years of experience
Mercedes-Benz C280 L6-2.8L - Ignition Coil - Montclair, New Jersey
This young man was full of life very passionate about his work, I will never go back to another service station, I felt very fortunate and lucky to have him as my mechanic today

Excellent Rating

(43)

Rating Summary
41
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Number of Mercedes-Benz Ignition Coil Replacement services completed
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services done by our mechanics
TOTAL NUMBER OF EXPERT Mercedes-Benz MECHANICS
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