Spark Plug Replacement Estimate for Mercedes-Benz 420SEL

Mercedes-Benz 420SEL Spark Plug Replacement costs $73 on average. Following is a breakdown of the labor and parts estimates.

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YourMechanic Price
$73 to $83
Labor: $70 -$80
Parts: $3
Average Dealer price
$99
Average Shop price
$87
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CarServiceYourMechanic PriceShop/Dealer Price
1987 Mercedes-Benz 420SELV8-4.2LService typeSpark Plug ReplacementYourMechanic Price$73.24Shop/Dealer Price$99.46 - $120.95
1986 Mercedes-Benz 420SELV8-4.2LService typeSpark Plug ReplacementYourMechanic Price$73.18Shop/Dealer Price$99.51 - $121.04
1990 Mercedes-Benz 420SELV8-4.2LService typeSpark Plug ReplacementYourMechanic Price$73.18Shop/Dealer Price$99.43 - $120.91
1989 Mercedes-Benz 420SELV8-4.2LService typeSpark Plug ReplacementYourMechanic Price$73.18Shop/Dealer Price$99.47 - $120.97
1988 Mercedes-Benz 420SELV8-4.2LService typeSpark Plug ReplacementYourMechanic Price$73.24Shop/Dealer Price$99.48 - $120.99
1991 Mercedes-Benz 420SELV8-4.2LService typeSpark Plug ReplacementYourMechanic Price$73.24Shop/Dealer Price$99.46 - $120.94
Show example Mercedes-Benz 420SEL Spark Plug Replacement prices

Parts required for a Mercedes-Benz 420SEL Spark Plug Replacement

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11 years of experience
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2011 MERCEDES-BENZ E550 - SPARK PLUG REPLACEMENT
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16 years of experience
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2010 MERCEDES-BENZ C300 - PRE-PURCHASE CAR INSPECTION
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All about Spark Plug Replacement

The spark plugs are an important part of the ignition system. When you turn the ignition key (car's key) on, it causes the ignition coil to generate the spark which ignites the air-fuel mixture in the engine cylinders to start the engine. The number of spark plugs in the car is the same as the number of cylinders, although some vehicle manufacturers will use two spark plugs per cylinder. Over time, the spark plugs wear out and require replacement. When the spark plugs wear out, it is harder for it the air-fuel mixture to ignite, resulting in engine misfires. If one of the spark plugs has failed, the car will still start and run, but it will run poorly. On some vehicles, spark plug replacement may be labor intensive and involve removal of the intake plenum.

Spark Plug Replacement Estimates for Popular Mercedes-Benz Models