Mercedes-Benz S420 Alternator Repair at your home or office.

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Alternator Repair Service

How much does a Alternator Repair cost?

On average, the cost for a Mercedes-Benz S420 Alternator Repair is $436 with $227 for parts and $209 for labor. Prices may vary depending on your location.

CarServiceEstimateShop/Dealer Price
1995 Mercedes-Benz S420V8-4.2LService typeAlternator RepairEstimate$706.42Shop/Dealer Price$858.28 - $1227.24
1996 Mercedes-Benz S420V8-4.2LService typeAlternator RepairEstimate$861.54Shop/Dealer Price$1063.25 - $1581.60
1998 Mercedes-Benz S420V8-4.2LService typeAlternator RepairEstimate$861.54Shop/Dealer Price$1063.25 - $1581.59
1999 Mercedes-Benz S420V8-4.2LService typeAlternator RepairEstimate$861.54Shop/Dealer Price$1063.16 - $1581.44
1994 Mercedes-Benz S420V8-4.2LService typeAlternator RepairEstimate$662.42Shop/Dealer Price$814.41 - $1183.46
1997 Mercedes-Benz S420V8-4.2LService typeAlternator RepairEstimate$680.30Shop/Dealer Price$836.70 - $1219.11
Show example Mercedes-Benz S420 Alternator Repair prices

How does an alternator help your car run?

The alternator is the component that charges the battery in your car. When you use electrical components in your car (stereo, lights, etc.), the battery loses power. The alternator recharges the battery, replenishing the lost battery power. The alternator is located in the engine compartment. If the alternator is not working properly, your car will only stay running for as long as the battery has power stored. Once the battery loses power, your car will not start. Normally, a malfunctioning alternator will turn on the battery warning light or will have a low volt gauge reading.

Alternator

Before repairing the alternator:

The mechanic should check the entire charging system before installing a new alternator, including checking battery cables for corrosion and the condition of the battery.

Steps when replacing an alternator:

  • Inspect entire charging system (battery, cables, alternator).
  • Inspect the drive belts.
  • Test alternator output.
  • Remove and replace alternator if found to be faulty.
  • Re-test alternator output.

Our recommendation for alternator replacements:

Ask your mechanic to inspect the condition of the charging system during every major service. The mechanic should also clean and tighten the battery cables during every major service.

What common symptoms indicate you may need to replace the Alternator?

  • Dead battery or battery will not hold a charge.
  • Dim lights.
  • Battery warning light is on.

Why repairing your alternator is important:

Your alternator charges your battery, which powers the electronics in your vehicle, such as the radio and the air conditioning. The battery is also needed to turn on your vehicle. A malfunctioning alternator will not charge your car’s battery, and your vehicle will eventually run out of battery life and not be able to start.

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Meet some of our expert Mercedes-Benz mechanics

Real customer reviews from Mercedes-Benz owners like you.

Excellent Rating

(13)

Rating Summary
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Whitney

39 years of experience
783 reviews
Whitney
39 years of experience
Mercedes-Benz S420 V8-4.2L - Brake Pads Replacement (Front, Rear) - Palo Alto, California
He is great.

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.

Jamie

22 years of experience
77 reviews
Jamie
22 years of experience
Mercedes-Benz S420 V8-4.2L - Serpentine/Drive Belt Replacement - Ontario, California
Great job

Kenneth

20 years of experience
762 reviews
Kenneth
20 years of experience
Mercedes-Benz S420 V8-4.2L - Oil Change - Los Angeles, California
He is the real deal... On time, did great work, very all together" good man and mechanic...... Thanks Kenneth.

Excellent Rating

(13)

Rating Summary
12
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1
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12
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Number of Mercedes-Benz S420 services completed
143+
services done by our mechanics
TOTAL NUMBER OF EXPERT Mercedes-Benz MECHANICS
1000+
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