Mercedes-Benz S450 Alternator / Serpentine Belt Replacement at your home or office.

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Alternator / Serpentine Belt Replacement Service

How much does a Alternator / Serpentine Belt Replacement cost?

On average, the cost for a Mercedes-Benz S450 Alternator / Serpentine Belt Replacement is $134 with $39 for parts and $95 for labor. Prices may vary depending on your location.

CarServiceEstimateShop/Dealer Price
2008 Mercedes-Benz S450V8-4.7LService typeAlternator / Serpentine Belt Replacement Estimate$265.39Shop/Dealer Price$312.99 - $433.29
2009 Mercedes-Benz S450V8-4.7LService typeAlternator / Serpentine Belt Replacement Estimate$245.39Shop/Dealer Price$293.01 - $413.32
2018 Mercedes-Benz S450V6-3.0L TurboService typeAlternator / Serpentine Belt Replacement Estimate$172.19Shop/Dealer Price$201.51 - $266.92
2011 Mercedes-Benz S450V8-4.7LService typeAlternator / Serpentine Belt Replacement Estimate$245.39Shop/Dealer Price$292.99 - $413.28
2010 Mercedes-Benz S450V8-4.7LService typeAlternator / Serpentine Belt Replacement Estimate$245.39Shop/Dealer Price$293.02 - $413.35
Show example Mercedes-Benz S450 Alternator / Serpentine Belt Replacement prices

What is the Alternator Belt all about?

The alternator is a generator that converts mechanical energy into electrical energy. It uses the revolving motion of a magnetic field around a stationary armature creating electricity which is then stored in the car’s battery and operate electrical functions. The revolutions needed to create the electricity come from the engine’s crankshaft which is connected via a rubber belt. This alternator belt is either a v-belt or a flat ribbed belt more commonly known as a serpentine belt. The alternator belt may solely operate the alternator or it may also drive other items such as the water pump, air conditioning compressor, and the power steering pump. When the belt is loose, frayed or broken, the alternator isn’t able to generate electricity to charge the car battery causing poor operation of electrically powered accessories.

Keep in mind:

  • The alternator belt is made of rubber that degrades with age.
  • The alternator belt may drive more components than just the alternator. The power steering pump, water pump, and air conditioning compressor may use the same belt to operate.

How it's done:

  • The belt tensioner is loosened
  • The defective belt is removed
  • The new belt is installed and tensioner is tightened on to belt
  • The engine is started and belt operation is checked
  • The vehicle is road tested for proper operation

Our recommendation:

Your mechanic will check the condition of the alternator belt every time the oil is changed. If they notice the belt appears frayed, cracked, or is missing pieces, you should have the belt replaced.

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

  • Battery light comes on
  • Interior lights and headlights flicker and dim
  • Engine stalls while driving and will not turn over to restart
  • Flapping sound of a frayed belt might be heard under the hood

How important is this service?

If your alternator belt breaks while you are driving, you may lose electrical power to important systems inside your vehicle or the engine may die. You could be left stranded or in a dangerous situation. Replace the alternator belt as soon as you notice unusual wear.

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Meet some of our expert Mercedes-Benz mechanics

Real customer reviews from Mercedes-Benz owners like you.

Excellent Rating

(7)

Rating Summary
6
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1
6
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Ricardo

14 years of experience
339 reviews
Ricardo
14 years of experience
Mercedes-Benz S450 V6-3.0L Turbo - Pre-purchase Car Inspection - Culver City, California
Ricardo is very trustworthy, responsible, on time for the service , and fast reply.

Kenneth

20 years of experience
787 reviews
Kenneth
20 years of experience
Mercedes-Benz S450 V6-3.0L Turbo - Pre-purchase Car Inspection - Los Angeles, California
Kenneth is very friendly and easy to work with.

Trevor

22 years of experience
185 reviews
Trevor
22 years of experience
Mercedes-Benz 300SD L5-3.0L Turbo Diesel - Alternator Belt - Encinitas, California
Trevor showed up on time and had the work completed within the estimated time. Professional and friendly. I highly recommend Your Mechanic and Trevor. This was so easy, no up charges or surprises. I will use Your Mechanic for future auto services.

TJ

26 years of experience
362 reviews
TJ
26 years of experience
Mercedes-Benz 560SL V8-5.6L - Alternator Belt - Sarasota, Florida
Unfortunately TJ was running late due to earlier appointments running over, however, he kept in constant contact updating me on his arrival. His friendly disposition and love of his job make him a pleasure to deal with.

Excellent Rating

(7)

Rating Summary
6
0
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1
6
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1
Number of Mercedes-Benz Alternator / Serpentine Belt Replacement services completed
77+
services done by our mechanics
TOTAL NUMBER OF EXPERT Mercedes-Benz MECHANICS
1100+
experts on our platform

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