Mercedes-Benz E300 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 E300 Spark Plug Replacement is $246 with $106 for parts and $140 for labor. Prices may vary depending on your location.

Car	Service	Estimate	Shop/Dealer Price
2018 Mercedes-Benz E300L4-2.0L Turbo	Service typeSpark Plug Replacement	Estimate$367.40	Shop/Dealer Price$424.10 - $586.10
2017 Mercedes-Benz E300L4-2.0L Turbo	Service typeSpark Plug Replacement	Estimate$358.39	Shop/Dealer Price$413.32 - $574.00
1997 Mercedes-Benz E300L6-3.0L Diesel	Service typeSpark Plug Replacement	Estimate$655.42	Shop/Dealer Price$759.44 - $1058.31
2016 Mercedes-Benz E300V6-3.5L	Service typeSpark Plug Replacement	Estimate$493.79	Shop/Dealer Price$577.34 - $819.21
2013 Mercedes-Benz E300V6-3.5L	Service typeSpark Plug Replacement	Estimate$557.03	Shop/Dealer Price$659.48 - $951.11
2009 Mercedes-Benz E300V6-3.0L	Service typeSpark Plug Replacement	Estimate$725.84	Shop/Dealer Price$847.90 - $1199.92
2015 Mercedes-Benz E300V6-3.5L	Service typeSpark Plug Replacement	Estimate$493.79	Shop/Dealer Price$577.37 - $819.27
1998 Mercedes-Benz E300L6-3.0L Turbo Diesel	Service typeSpark Plug Replacement	Estimate$903.61	Shop/Dealer Price$1013.14 - $1316.16

Show example Mercedes-Benz E300 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

(22)

Rating Summary

21

0

1

0

0

21

0

1

0

0

SEE REVIEWS NEAR ME

Adam

18 years of experience

263 reviews

Adam

18 years of experience

by Horace

Mercedes-Benz E300 L4-2.0L Turbo - Oil Change - Pompano Beach, Florida

Excellent Job. 5 Stars.

Chet

42 years of experience

509 reviews

Chet

42 years of experience

by Cassandra

Mercedes-Benz E300 L4-2.0L Turbo - Pre-purchase Car Inspection - San Diego, California

Professional and on time, actually early. Provided good advise and piece of mind

Justin

6 years of experience

92 reviews

Justin

6 years of experience

by Staci

Mercedes-Benz E300 L6-3.0L Diesel - Headlight is not working - Mesa, Arizona

I am very happy with my service from Justin, he is an excellent mechanic, I appreciate every bit of his work. Thank you for having such great employees like him. Thank you, Staci Lee Bianchi

Lee

39 years of experience

294 reviews

Lee

39 years of experience

by steve

Mercedes-Benz E300 L6-3.0L Turbo Diesel - Oil Change - Guthrie, Oklahoma

Lee's Knowledge and experience is always appreciated...He is takes his time looking the vehicle over and letting me know what might be a problem in the future...Works very hard the entire time...Great Service!!

Excellent Rating

(22)

Rating Summary

21

0

1

0

0

21

0

1

0

0

SEE REVIEWS NEAR ME

Recent articles & questions

How to Clean and Repack Wheel Bearings

A wheel bearing should be cleaned and repacked if there is abnormal tire wear, grinding coming from the car tires, or steering wheel vibration.

B1995 OBD-II Trouble Code: Driver Side Side-Mount Air Bag Low Resistance on Squib

B1995 trouble code means there's a problem with the squib in the driver's side side-mount air bag, caused by faulty wiring or a bad battery.

How Long Does a Clutch Safety Switch Last?

The The clutch safety switch is located on vehicles with manual transmissions. For vehicles with automatic transmissions, this part is called the neutral safety switch and has a similar role. The neutral safety switch prevents the vehicle from turning on...

New codes after fixing previous problem

Hi there, thanks for writing in. Code P2311 (https://www.yourmechanic.com/article/p2311-obd-ii-trouble-code-ignition-coil-d-secondary-circuit-by-jay-safford) points out a problem with the ignition of cylinder #4. The spark is most likely not lasting long enough. There may be another issue going on with the vehicle. I'd recommend...

Ticking noise from passenger side

Hello, I'm sure the dealership heard the noise however it is a normal noise from a Chrysler Hemi engine. This noise is most likely a lifter rattle or noise where a lifter spring is sticking closed and rattling in its...

does a 2009 VW New Beetle 2.5 l have a timing belt or a timing chain?

This engine uses a timing belt and not a timing chain.

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 (844) 997-3624 · hi@yourmechanic.com