Mercedes-Benz E420 Ignition Cable (Spark plug wires) Replacement at your home or office.

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received a Ignition Cable (Spark plug wires) Replacement.
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$396.72 - $411.72

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Average rating from customers who
received a Ignition Cable (Spark plug wires) Replacement.
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Ignition Cable (Spark plug wires) Replacement Estimate for Mercedes-Benz E420

Mercedes-Benz E420 Ignition Cable (Spark plug wires) Replacement costs $404 on average.

CarServiceEstimateShop/Dealer Price
1995 Mercedes-Benz E420V8-4.2LService typeIgnition Cable (Spark plug wires) ReplacementEstimate$680.95Shop/Dealer Price$850.39 - $1288.80
1994 Mercedes-Benz E420V8-4.2LService typeIgnition Cable (Spark plug wires) ReplacementEstimate$680.95Shop/Dealer Price$850.24 - $1288.53
Show example Mercedes-Benz E420 Ignition Cable (Spark plug wires) Replacement prices

Ignition Cable (Spark plug wires) Replacement Service

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.

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Meet some of our expert Mercedes-Benz mechanics

Real customer reviews from Mercedes-Benz owners like you.

Excellent Rating


YourMechanic Mercedes-Benz E420 Service

Average Rating

4.5/5

Number of Reviews

15

Rating Summary
11
2
1
0
1
11
2
1
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1

Ben

39 years of experience
1137 reviews
Ben
39 years of experience
Mercedes-Benz E420 - Alternator - Houston, Texas
Fast work. Friendly. Very competent.

TJ

20 years of experience
34 reviews
TJ
20 years of experience
Mercedes-Benz E420 - Radiator - Glen Burnie, Maryland
See the rating areas

Richard

19 years of experience
461 reviews
Richard
19 years of experience
Mercedes-Benz E420 - Fuel Pump - Atlanta, Georgia
I would highly recommend

Brian

20 years of experience
132 reviews
Brian
20 years of experience
Mercedes-Benz E420 - Oil Change - Springfield, Virginia
It's the second time Brian has worked on my car (I should've left a comment the first time, but forgot). Each time he not only has been efficient, he's been a real professional. We also have a good time while he works. He's worked on my car at home and at my office and no matter where he works, I've been very satisfied. Owning an older model Mercedes Benz, I always worry that others won't treat it the way I feel it should be treated, but Brian does. He's knowledgeable and gentle with every part he handles and every screw or bolt he turns--I appreciate that. If my first two experiences are any indication of the future, my car is in good hands. Thanks Brian.

Excellent Rating


YourMechanic Mercedes-Benz E420 Service

Average Rating

4.5/5

Number of Reviews

15

Rating Summary
11
2
1
0
1
11
2
1
0
1
Red-stars EXCELLENT RATING ON
Number of Mercedes-Benz E420 services completed
165+
services done by our mechanics
TOTAL NUMBER OF EXPERT Mercedes-Benz MECHANICS
800+
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