Mercedes-Benz SLK350 Spark Plug Replacement at your home or office.

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Spark Plug Replacement Estimate for Mercedes-Benz SLK350

Mercedes-Benz SLK350 Spark Plug Replacement costs $335 on average.

CarServiceEstimateShop/Dealer Price
2014 Mercedes-Benz SLK350V6-3.5LService typeSpark Plug ReplacementEstimate$459.83Shop/Dealer Price$569.84 - $826.63
2016 Mercedes-Benz SLK350V6-3.5LService typeSpark Plug ReplacementEstimate$438.59Shop/Dealer Price$550.84 - $814.24
2013 Mercedes-Benz SLK350V6-3.5LService typeSpark Plug ReplacementEstimate$429.83Shop/Dealer Price$539.88 - $796.71
2008 Mercedes-Benz SLK350V6-3.5LService typeSpark Plug ReplacementEstimate$564.14Shop/Dealer Price$707.89 - $1061.04
2006 Mercedes-Benz SLK350V6-3.5LService typeSpark Plug ReplacementEstimate$564.14Shop/Dealer Price$708.00 - $1061.23
2010 Mercedes-Benz SLK350V6-3.5LService typeSpark Plug ReplacementEstimate$564.14Shop/Dealer Price$707.95 - $1061.15
2012 Mercedes-Benz SLK350V6-3.5LService typeSpark Plug ReplacementEstimate$437.33Shop/Dealer Price$547.02 - $803.58
2015 Mercedes-Benz SLK350V6-3.5LService typeSpark Plug ReplacementEstimate$446.09Shop/Dealer Price$558.95 - $822.82
Show example Mercedes-Benz SLK350 Spark Plug Replacement prices

Spark Plug Replacement Service

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.

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Manuel

12 years of experience
70 reviews
Manuel
12 years of experience
Mercedes-Benz SLK350 V6-3.5L - Brake Pads Replacement (Front) - Naples, Florida
Manuel arrived early, and was efficient and thorough in his analysis. His work quality seems excellent.

Quentin

22 years of experience
213 reviews
Quentin
22 years of experience
Mercedes-Benz SLK350 V6-3.5L - Trunk Lift Support Shocks - Katy, Texas
Again, Quentin is very skilled and experienced. He is our mechanic for Mercedes and Volkswagen! Robin

Ernesto

19 years of experience
4 reviews
Ernesto
19 years of experience
Mercedes-Benz SLK350 V6-3.5L - Ignition Coil - Miami, Florida
I am so pleased and relieved. Your service person Ernesto was on time, courteous, and took the time to inform me just what was what with my car which is very important to me. He efficiently did the job within 10 minutes of the time quoted. After all the problems I have had recently with auto repairs I am more than pleased that I booked my appointment with your company and will use you from now on! Thank you for the Ernesto experience my faith is restoredl

Grzegorz

41 years of experience
473 reviews
Grzegorz
41 years of experience
Mercedes-Benz SLK350 V6-3.5L - Brake Rotor/Disc Replacement (Front, Rear) - San Francisco, California
Gregory is a true mechanic. Know what and how to do. Efficient and accurate. Great guy

Excellent Rating

(45)

Rating Summary
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Number of Mercedes-Benz SLK350 services completed
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TOTAL NUMBER OF EXPERT Mercedes-Benz MECHANICS
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