Mercedes-Benz 420SEL Ignition Cable (Spark plug wires) Replacement at your home or office.

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Ignition Cable (Spark plug wires) Replacement Estimate for Mercedes-Benz 420SEL

Mercedes-Benz 420SEL Ignition Cable (Spark plug wires) Replacement costs $229 on average. Following is a breakdown of the labor and parts estimates.

YourMechanic Price
$228 to $245
Labor: $119 -$136
Parts: $109
Average Dealer price
$377
Average Shop price
$278
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Our mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing
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CarServiceYourMechanic PriceShop/Dealer Price
1989 Mercedes-Benz 420SELV8-4.2LService typeIgnition Cable (Spark plug wires) ReplacementYourMechanic Price$337.36Shop/Dealer Price$435.15 - $631.31
1988 Mercedes-Benz 420SELV8-4.2LService typeIgnition Cable (Spark plug wires) ReplacementYourMechanic Price$337.36Shop/Dealer Price$435.35 - $631.67
1991 Mercedes-Benz 420SELV8-4.2LService typeIgnition Cable (Spark plug wires) ReplacementYourMechanic Price$337.36Shop/Dealer Price$435.22 - $631.44
1990 Mercedes-Benz 420SELV8-4.2LService typeIgnition Cable (Spark plug wires) ReplacementYourMechanic Price$337.36Shop/Dealer Price$435.28 - $631.55
1986 Mercedes-Benz 420SELV8-4.2LService typeIgnition Cable (Spark plug wires) ReplacementYourMechanic Price$337.36Shop/Dealer Price$435.18 - $631.37
1987 Mercedes-Benz 420SELV8-4.2LService typeIgnition Cable (Spark plug wires) ReplacementYourMechanic Price$337.36Shop/Dealer Price$435.13 - $631.29
Show example Mercedes-Benz 420SEL Ignition Cable (Spark plug wires) Replacement prices

Ignition Cable (Spark plug wires) Replacement Service & Cost

What is the Ignition Cable (Spark plug wires) all about?

The ignition cables, also known as “spark plug wires” are part of the ignition system. They transfer the spark from the distributor or ignition coil to spark plugs that ignite the air-fuel mixture, starting the engine.

Over time, the cables can get weak and break down. This will make it harder for the spark to reach the engine cylinders, resulting in engine misfires. The car may not start at all. If one of the spark plugs has gone bad, the car will still start and run, but it will run poorly.

Keep in mind:

  • Ignition cable failure is often caused by other failing pieces in the ignition system; a mechanic should check for any other malfunctioning parts, and replace any parts of the system that don’t work.
  • Every time the ignition cables are replaced, the spark plugs should be inspected.
  • Leaking oil or coolant can cause ignition wire failure. If this is the case, the cause of the leak should be repaired or replaced, or else the new ignition wires will quickly be damaged as well.

How it's done:

  • Scan the computer system in the car for codes.
  • Inspect ignition cables (look for white spots).
  • Ohm test on individual cables.
  • Remove and replace the cables if found faulty.
  • Inspect the spark plugs.
  • Clear the codes.

Our recommendation:

Ignition wires should be replaced at least every 60,000 miles, but whenever your car is serviced, it’s a good idea to have the entire ignition system inspected. Any time that you have spark plugs replaced, it’s a good idea to have the ignition wires replaced as well. If you notice that your engine is running poorly, you should schedule an inspection.

What common symptoms indicate you may need to replace the Ignition Cable (Spark plug wires)?

  • Check Engine light is on.
  • Engine misfires.
  • Poor gas mileage.
  • Engine may shake (light vibration).

How important is this service?

The fuel in your automobile is ignited by a spark. This starts with the ignition coil, which transforms low voltage power into extremely high voltage. This high voltage is transferred through the ignition cables, and to the spark plug, where a spark is created that ignites the engine’s fuel, and powers the engine.

When one or more ignition cables fail, this voltage will not be transferred from the ignition coil to the spark plugs, and the fuel will not be ignited. Depending on how many of your ignition cables malfunction, your car will either run poorly, or won’t run at all.

Fast and easy Ignition Cable (Spark plug wires) Replacement service at your home or office.

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370 reviews
Trung
8 years of experience
Trung called and arrived a bit earlier which I told him he could do that since I'm already back in my location. He took care of it like a pro and fast. I found out he has to drive from quite a distance away to my location which make me feel bad. My Mercedes warning light was all reset after the oil change and everything is back to normal. Found a minor leak in trans axle. Awesome job Trung. Keep up the good work.
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Jeff
29 years of experience
Great
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203 reviews
Joseph
23 years of experience
Joseph communicated with me from the time he was on his way to when he had finished the work. Joseph was efficient and complete in getting the maintenance work done. So much so, he is scheduled to come back tomorrow to do some additional work.
2004 MERCEDES-BENZ SL500 - 72,000 MILES MAINTENANCE SERVICE
40 reviews
Jay
12 years of experience
Jays is such a gentlemen, I am very happy and please with his service. I will definitely book him again. Thank you
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Get an instant quote for your car
Our mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing
Get a quote
CarServiceYourMechanic PriceShop/Dealer Price
1989 Mercedes-Benz 420SELV8-4.2LService typeIgnition Cable (Spark plug wires) ReplacementYourMechanic Price$337.36Shop/Dealer Price$435.15 - $631.31
1988 Mercedes-Benz 420SELV8-4.2LService typeIgnition Cable (Spark plug wires) ReplacementYourMechanic Price$337.36Shop/Dealer Price$435.35 - $631.67
1991 Mercedes-Benz 420SELV8-4.2LService typeIgnition Cable (Spark plug wires) ReplacementYourMechanic Price$337.36Shop/Dealer Price$435.22 - $631.44
1990 Mercedes-Benz 420SELV8-4.2LService typeIgnition Cable (Spark plug wires) ReplacementYourMechanic Price$337.36Shop/Dealer Price$435.28 - $631.55
1986 Mercedes-Benz 420SELV8-4.2LService typeIgnition Cable (Spark plug wires) ReplacementYourMechanic Price$337.36Shop/Dealer Price$435.18 - $631.37
1987 Mercedes-Benz 420SELV8-4.2LService typeIgnition Cable (Spark plug wires) ReplacementYourMechanic Price$337.36Shop/Dealer Price$435.13 - $631.29
Show example Mercedes-Benz 420SEL Ignition Cable (Spark plug wires) Replacement prices

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