Mercedes-Benz SL55 AMG Spark Plug Replacement Costs

Estimate price near me

Service Location

Customer Ratings

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.

See availability

Customer Ratings

Spark Plug Replacement Service

How much does a Spark Plug Replacement cost?

On average, the cost for a Mercedes-Benz SL55 AMG Spark Plug Replacement is $635 with $383 for parts and $252 for labor. Prices may vary depending on your location.

Car	Service	Estimate	Shop/Dealer Price
2005 Mercedes-Benz SL55 AMGV8-5.5L Turbo	Service typeSpark Plug Replacement	Estimate$1231.72	Shop/Dealer Price$1450.40 - $2045.69
2003 Mercedes-Benz SL55 AMGV8-5.5L Turbo	Service typeSpark Plug Replacement	Estimate$1204.69	Shop/Dealer Price$1410.12 - $1995.48
2007 Mercedes-Benz SL55 AMGV8-5.5L Turbo	Service typeSpark Plug Replacement	Estimate$1029.50	Shop/Dealer Price$1229.55 - $1810.86
2006 Mercedes-Benz SL55 AMGV8-5.5L Turbo	Service typeSpark Plug Replacement	Estimate$1204.69	Shop/Dealer Price$1410.30 - $1995.79
2004 Mercedes-Benz SL55 AMGV8-5.5L Turbo	Service typeSpark Plug Replacement	Estimate$1204.69	Shop/Dealer Price$1421.35 - $2015.13
2008 Mercedes-Benz SL55 AMGV8-5.5L Turbo	Service typeSpark Plug Replacement	Estimate$1029.50	Shop/Dealer Price$1230.17 - $1811.96

Show example Mercedes-Benz SL55 AMG Spark Plug Replacement prices

What are spark plugs and how do they work?

Spark plugs are one of the key components of your vehicle’s ignition system. They ignite gasoline and air inside of your engine. This gives your engine the power to propel you down the road. The spark plug takes high voltage electricity from the ignition coil and creates a spark at just right moment during the engine’s combustion cycle. This gives the engine the best mix of power, fuel economy and low emissions. However, the electrode at the end of the spark plug eventually wears out and can cause performance issues.

Spark plugs-MATROX-1

When should you replace spark plugs?

Replacement should follow the vehicle maintenance schedule. This will be listed in the vehicle’s owner’s manual. Some cars require regular replacement at 30k, 60k or 100k miles. It is possible in some cases that a spark plug might fail before the service schedule, but it’s not typically common.

Avoiding spark plug replacement can cause:

Difficulty starting your car.
Check engine light for a misfire code.
Flashing check engine light during acceleration for misfire, this can cause engine damage.
Reduced fuel economy and/or power.
Rough idle and/or unexplained engine vibration.
Failed State emission testing.

Even if only one spark plug is found to be faulty, they should always be replaced in sets. Most engines will require 4,6, or 8 spark plugs.

How do mechanics replace spark plugs?

Spark plugs are threaded into the engine’s cylinder head(s). Most cars have one plug per cylinder, so a four-cylinder engine will have four plugs, a six-cylinder engine will have six plugs, and so forth. The mechanic will:

Have the correct spark plugs on hand for your vehicle
Pull any diagnostic trouble codes that may be related to worn spark plugs.
Remove the original spark plugs and look at removed spark plugs for any clues indicating engine mis-operation exists; such as oil burning, excessively rich mixture, pre-ignition damage etc. Inform owner of any found unusual conditions.
Install new plugs using a torque wrench.
Finally, a road test of the vehicle to confirm normal operation.

Is it safe to drive with worn spark plugs?

Yes, but spark plugs that are worn enough to cause engine-misfiring have the potential to cause engine damage and overheating of the catalytic converter. Regardless of the age of the plugs, or mileage, if the engine misfires or runs poorly, the plugs should be inspected for defects. Generally, spark plug failure will not keep the engine from running, but in cases of extreme wear, you may experience a limitation in the speed at which you can drive the car. If the maintenance schedule says the plugs should be replaced, it is best to do so promptly.

When having spark plugs replaced keep in mind:

High-speed driving may accelerate spark plug wear. Consider earlier than required inspection and tune-up if you operate the car in severe conditions.
Plugs should always be promptly replaced per the manufacturer maintenance schedule even if they appear to be working perfectly.
If your vehicle is equipped with spark plug wires (as opposed to a coil-on-plug system), the wires should be replaced at the same time. This may increase the cost of your repair.
It is possible that when doing a spark plug replacement, your vehicle may also need additional parts like ignition coils, this will add to the repair cost.
Some engines require that the intake manifold be removed while replacing spark plugs. This may increase the parts and labor cost for the repair.
Leaking valve cover gaskets, which have let oil get in contact with the spark plugs, coils or wires, may be the cause of ignition system issues. Valve cover gaskets will need to be replaced in addition to the spark plugs, wires or coils. This will add to the repair cost.

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

(7)

Rating Summary

5

1

0

0

1

5

1

0

0

1

SEE REVIEWS NEAR ME

Josh

17 years of experience

78 reviews

Josh

17 years of experience

by Roland

Mercedes-Benz SL55 AMG V8-5.5L Turbo - Pre-purchase Car Inspection - Naples, Florida

Josh is super duper!

Whitney

40 years of experience

783 reviews

Request Whitney

Whitney

40 years of experience

Request Whitney

by Ash

Mercedes-Benz SL55 AMG V8-5.5L Turbo - Check Engine Light is on - Palo Alto, California

Arrived early Friendly Found out what was wrong and quickly and easily told me how to schedule follow on appt

Harish

28 years of experience

588 reviews

Harish

28 years of experience

by Joseph

Mercedes-Benz SL55 AMG V8-5.5L Turbo - Pre-purchase Car Inspection - Huntersville, North Carolina

A young old pro. He knows what he is doing and has the ability to diagnose instantly. Good perdon to work with. Thanks

Michael

28 years of experience

672 reviews

Request Michael

Michael

28 years of experience

Request Michael

by Victor

Mercedes-Benz SL55 AMG V8-5.5L Turbo - Alternator - Mesa, Arizona

Did what he was hired for. Unfortunately, one day after I got a quotation, you increased the price based on needing more hours of labor being necessary, which was not the actual case. One other problem was found, after the alternator was installed and I was left with handling this issue with someone else. Michael did not offer a solution or further diagnosis. Did what he was hired for and nothing more.

Excellent Rating

(7)

Rating Summary

5

1

0

0

1

5

1

0

0

1

SEE REVIEWS NEAR ME

Recent articles & questions

How Long Does a Low Oil Level Sensor Last?

Having Having the right amount of oil in an engine is important to the smooth running of your engine. In order for the engine on a car to run as intended, it will have to have the right amount of...

How Long Does a Speed Timing Sensor Last?

Your Your car’s engine needs a considerable number of sensors in order to operate correctly. Oxygen sensors, the vehicle speed sensor, the mass airflow sensor – these are just a few of them. Your engine also needs a speed timing...

How to Replace a Power Brake Booster

Replacing a power brake booster can be challenging, as it requires several steps and the proper tools to do so.

Brake lights are out after replacing bulbs

It sounds like you have already taken the first steps toward fixing the problem, but you may have hit a small wall. Changing the bulbs in your Jeep is a great first step so feel good! If the lights are...

hi i have a honda civic 2002 lx the manifold overheating it turned on red because the heat by the thermostat and the switch the

Be sure not to drive the car if it is overheating because overheating can warp the cylinder head and/or engine block causing costly damage. The most common causes of overheating include low coolant level, a faulty thermostat, a plugged radiator,...

2009 volkwasgon Jetta 2.5 5 cylinder

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