Mercedes-Benz S420 Distributor Cap and Rotor Replacement at your home or office.

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Distributor Cap and Rotor Replacement Service

How much does a Distributor Cap and Rotor Replacement cost?

On average, the cost for a Mercedes-Benz S420 Distributor Cap and Rotor Replacement is $337 with $242 for parts and $95 for labor. Prices may vary depending on your location.

CarServiceEstimateShop/Dealer Price
1995 Mercedes-Benz S420V8-4.2LService typeDistributor Cap and Rotor ReplacementEstimate$598.21Shop/Dealer Price$736.52 - $1112.06
1994 Mercedes-Benz S420V8-4.2LService typeDistributor Cap and Rotor ReplacementEstimate$578.21Shop/Dealer Price$716.55 - $1092.11
Show example Mercedes-Benz S420 Distributor Cap and Rotor Replacement prices

What are the Distributor Rotor and Cap all about?

When the engine is running, high voltage created by the ignition coil travels through the coil wire to the ignition rotor. As the ignition rotor turns in the distributor, the rotor distributes the spark by sending it in a synchronized order through the spark plug wires to the spark plug located in each of the engine's cylinders.

The distributor is a main component of the ignition system. It takes very high voltage and delivers it to fire the spark plugs.

Keep in mind:

  • When the distributor rotor and cap are replaced, the entire ignition system should be inspected.
  • After replacing the distributor rotor and cap, the ignition wires will need to be reinstalled.

How it's done:

  • Check the ignition system.
  • Replace the cap and rotor if found faulty.
  • Re-check the ignition system.
  • Check ignition timing if needed.

Our recommendation:

Whenever your vehicle has routine maintenance or servicing, the ignition system should be inspected thoroughly. If you ever notice your ignition system having a hard time (such as your car having trouble turning on or staying on), then you should schedule an inspection.

What common symptoms indicate you may need to replace the Distributor Rotor and Cap?

  • Engine misfires.
  • Car does not start.
  • Noises from the engine.
  • Check engine light is on.

How important is this service?

The distributor rotor and cap is used when the engine is running. During this time, high voltage is created by the ignition coil, and sent through the coil wire to the ignition rotor. This rotor turns inside the distributor, and as it does so, it evenly distributes sparks to the spark plugs, through the spark plug wires. The spark plugs then use this spark to ignite the fuel mixture, which allows the engine to keep running.

If the distributor rotor and cap malfunction, the voltage from the ignition coil won’t be redistributed to the spark plugs, and your engine will either have a hard time running, or won’t run at all.

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Excellent Rating

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Whitney

39 years of experience
783 reviews
Whitney
39 years of experience
Mercedes-Benz S420 V8-4.2L - Fix a Flat Tire (Plug Holes) - Palo Alto, California
It's great.

ALAA

37 years of experience
56 reviews
ALAA
37 years of experience
Mercedes-Benz S420 V8-4.2L - Thermostat - Sacramento, California
punctual and communicative. Works with you when things go wrong. would recommend.

Eric

15 years of experience
133 reviews
Eric
15 years of experience
Mercedes-Benz S420 V8-4.2L - Oil Change - Bowie, Maryland
Kept me informed for his arrival. Was very friendly.

Tam

22 years of experience
251 reviews
Tam
22 years of experience
Mercedes-Benz S420 V8-4.2L - Fuel Filter - San Francisco, California

Excellent Rating

(13)

Rating Summary
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Number of Mercedes-Benz S420 services completed
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TOTAL NUMBER OF EXPERT Mercedes-Benz MECHANICS
1100+
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