Mercedes-Benz 400SEL 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 400SEL Ignition Coil Replacement is $1512 with $1274 for parts and $238 for labor. Prices may vary depending on your location.

CarServiceEstimateShop/Dealer Price
1993 Mercedes-Benz 400SELV8-4.2LService typeIgnition Coil ReplacementEstimate$2811.08Shop/Dealer Price$3458.69 - $5377.40
Show example Mercedes-Benz 400SEL 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

Real customer reviews from Mercedes-Benz owners like you.

Excellent Rating

(52)

Rating Summary
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Attila

20 years of experience
1104 reviews
Attila
20 years of experience
Mercedes-Benz 400SEL V8-4.2L - Car starts and then dies - Union, New Jersey
First his did great job and finally he said the issue was ignition coil.

Brent

9 years of experience
87 reviews
Brent
9 years of experience
Mercedes-Benz S550 V8-5.5L - Ignition Coil - Atlanta, Georgia
Great! Very pleasant and professional

Brandon

19 years of experience
5 reviews
Brandon
19 years of experience
Mercedes-Benz C300 V6-3.0L - Ignition Coil - Pompano Beach, Florida
So professional.. Fast work.. Great job.. Thank you

Bryan

3 years of experience
187 reviews
Bryan
3 years of experience
Mercedes-Benz C350 V6-3.5L - Ignition Coil - Miami, Florida
Punctual & very professional I would definitely recommend this gentleman for the job.

Excellent Rating

(52)

Rating Summary
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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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