Mercedes-Benz GL450 Spark Plug Replacement at your home or office.

Our mobile mechanics offer services 7 days a week. Upfront and transparent pricing.

Estimate price near me

Service Location

Customer Ratings

(4)

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.

Customer Ratings

(4)

Spark Plug Replacement Service

How much does a Spark Plug Replacement cost?

On average, the cost for a Mercedes-Benz GL450 Spark Plug Replacement is $282 with $149 for parts and $133 for labor. Prices may vary depending on your location.

CarServiceEstimateShop/Dealer Price
2010 Mercedes-Benz GL450V8-4.7LService typeSpark Plug ReplacementEstimate$776.02Shop/Dealer Price$930.66 - $1347.31
2008 Mercedes-Benz GL450V8-4.7LService typeSpark Plug ReplacementEstimate$743.52Shop/Dealer Price$899.20 - $1316.63
2015 Mercedes-Benz GL450V6-3.0L TurboService typeSpark Plug ReplacementEstimate$430.11Shop/Dealer Price$528.93 - $770.18
2011 Mercedes-Benz GL450V8-4.7LService typeSpark Plug ReplacementEstimate$734.02Shop/Dealer Price$888.64 - $1305.29
2014 Mercedes-Benz GL450V8-4.7L TurboService typeSpark Plug ReplacementEstimate$654.59Shop/Dealer Price$799.03 - $1200.77
2016 Mercedes-Benz GL450V6-3.0L TurboService typeSpark Plug ReplacementEstimate$499.08Shop/Dealer Price$612.04 - $875.97
2007 Mercedes-Benz GL450V8-4.7LService typeSpark Plug ReplacementEstimate$744.52Shop/Dealer Price$898.91 - $1315.37
2013 Mercedes-Benz GL450V8-4.7L TurboService typeSpark Plug ReplacementEstimate$661.59Shop/Dealer Price$806.34 - $1208.31
Show example Mercedes-Benz GL450 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

(4)

Rating Summary
4
0
0
0
0
4
0
0
0
0

Ben

34 years of experience
1419 reviews
Ben
34 years of experience
GL450 2007 - Spark Plugs - Houston, TX
While Ben was not on time for the appointment, he was in constant communication and informed me of his delay and progress. He was professional and friendly. I would highly recommend, and in fact I will request Ben for our next service next week.

Joe

36 years of experience
958 reviews
Joe
36 years of experience
GL450 2010 - Serpentine/Drive Belt - Tarpon Springs, FL
Just very happy with the service.

Gustavo

15 years of experience
303 reviews
Gustavo
15 years of experience
GL450 2007 - Air Spring Bag - San Antonio, TX
Awesome work!! Very knowledgeable and great person! Lucky to find him.

JOHNNY

31 years of experience
120 reviews
JOHNNY
31 years of experience
GL450 2012 - Air Springs - Folsom, CA
Very polite, reached on time and communicated very well. Completely reverse experience than what I had with the previous one. I completely lost my faith in YourMechanic. Will go withdraw my complaint at BBB and also modify my review with Yelp. Johnny was great!

Excellent Rating

(4)

Rating Summary
4
0
0
0
0
4
0
0
0
0
Number of Mercedes-Benz GL450 Spark Plug Replacement services completed
44+
services done by our mechanics
TOTAL NUMBER OF EXPERT Mercedes-Benz MECHANICS
1000+
experts on our platform

Recent articles & questions

Symptoms of a Bad or Failing Battery
Common signs include a rotten egg smell, slow cranking when starting, the Battery Light turning on, and vehicle electronics not powering on.
P0066 OBD-II Trouble Code: Air Assisted Injector Control Circuit or Circuit Low
P0066 P0066 trouble code definition Air Assisted Injector Control Circuit or Circuit Low What the P0066 code means This code indicates that the powertrain control module (PCM) is detecting a voltage from the air assisted injector control circuit that is...
Insurance Requirements for Car Registration in Alaska
According According to the Alaska Statute 28.22.101, every owner of a motor vehicle is required to carry liability automotive insurance, in order to operate their vehicle legally. The minimum liability insurance required for vehicle owners under this law is as...

Got hit in left rear and it looks like axle is bent.

Hi there. A vehicle collision can cause more than simple cosmetic damage, especially if the impact was at the right angle. If the tire is crooked, the damage may be a broken strut mount assembly (https://www.yourmechanic.com/article/symptoms-of-a-bad-or-failing-strut-assembly) or lower control arm....

Car won't move only buzzes when in gear and rolls in park.

Check the shifter cable to the transmission and see if it has broken off the transmission. The buzzing noise is the hydraulic fluid going around the main valve on the transmission and the valve is stuck in between a gear....

My 2009 mercury mariner 6 cylinder check engine light is on and my scan tool says cylinder 2 misfire. It will drive fine for about 20 min. The it will loose power and shudder

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