Mercedes-Benz 300SEL Ignition Coil Replacement Costs

Car	Service	Estimate	Shop/Dealer Price
1991 Mercedes-Benz 300SELL6-3.0L	Service typeIgnition Coil Replacement	Estimate$1986.68	Shop/Dealer Price$2450.90 - $3829.39
1990 Mercedes-Benz 300SELL6-3.0L	Service typeIgnition Coil Replacement	Estimate$1977.67	Shop/Dealer Price$2438.80 - $3814.97

Car

Service

Estimate

Shop/Dealer Price

1991 Mercedes-Benz 300SELL6-3.0L

Service typeIgnition Coil Replacement

Estimate$1986.68

Shop/Dealer Price$2450.90 - $3829.39

1990 Mercedes-Benz 300SELL6-3.0L

Service typeIgnition Coil Replacement

Estimate$1977.67

Shop/Dealer Price$2438.80 - $3814.97

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.

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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Robert

18 years of experience

28 reviews

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by Lane

Mercedes-Benz 300SEL L6-3.0L - Drive Belt Tensioner - Newtown Square, Pennsylvania

Robert has a positive attitude and is very professional. He got my vintage (ancient?) Mercedes all patched up and running again. I would definitely recommend Robert without hesitation!

Johnny

34 years of experience

392 reviews

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by John

Mercedes-Benz GLA250 L4-2.0L Turbo - Ignition Coil - Citrus Heights, California

Extraordinary mechanic, hand down.

Ronald

42 years of experience

519 reviews

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by Brandi

Mercedes-Benz GLK350 V6-3.5L - Ignition Coil - Humble, Texas

I had a great experience with Ronald. He replaced spark plugs and ignition coils. He is professional, honest, competent and a good communicator. As a woman, I am often skeptical of mechanics, but I am pleased with the service I've received from Ronald. I will definitely use again and recommend.

Tinashe

14 years of experience

781 reviews

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by Trish

Mercedes-Benz CLS550 V8-5.5L - Ignition Coil - Atlanta, Georgia

Easy to talk to and explained what was going on in a way I can understand.

Mercedes-Benz 300SEL 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 300SEL Ignition Coil Replacement is $284 with $144 for parts and $140 for labor. Prices may vary depending on your location.

What is an ignition coil and how does it work?

When to consider replacing an ignition coil:

How do mechanics replace the ignition coil?

Is it safe to drive with an ignition coil problem?

When replacing an ignition coil keep in mind:

Meet some of our expert Mercedes-Benz mechanics

Excellent Rating

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Tinashe

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