Mercedes-Benz 420SEL Differential/Gear Oil Replacement at your home or office.

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Differential/Gear Oil Replacement Service

How much does a Differential/Gear Oil Replacement cost?

On average, the cost for a Mercedes-Benz 420SEL Differential/Gear Oil Replacement is $171 with $31 for parts and $140 for labor. Prices may vary depending on your location.

CarServiceEstimateShop/Dealer Price
1990 Mercedes-Benz 420SELV8-4.2LService typeDifferential / Gear Oil - Front ReplacementEstimate$216.96Shop/Dealer Price$238.75 - $289.95
1991 Mercedes-Benz 420SELV8-4.2LService typeDifferential / Gear Oil - Front ReplacementEstimate$207.95Shop/Dealer Price$226.65 - $275.53
1991 Mercedes-Benz 420SELV8-4.2LService typeDifferential / Gear Oil - Rear ReplacementEstimate$207.95Shop/Dealer Price$226.69 - $275.60
1990 Mercedes-Benz 420SELV8-4.2LService typeDifferential / Gear Oil - Rear ReplacementEstimate$207.95Shop/Dealer Price$226.69 - $275.60
Show example Mercedes-Benz 420SEL Differential/Gear Oil Replacement prices

What is the Differential/Gear Oil all about?

Differential oil is a type of oil. Cars have a gearbox connecting the two axles. This gearbox is responsible for the conversion of engine power and its transmission to the wheels, allowing them to turn at varying speeds. This part of the car is called the differential, and lubrication is needed for it to function properly. Differential fluid, also called differential oil, provides the lubrication and cooling of the car’s differential. The fluid is there to protect the gears’ metal surfaces from friction, and to prevent overheating and burning.

Keep in mind:

  • Some vehicles have a front differential and others have a rear differential.
  • Some vehicles use a synthetic gear oil.

How it's done:

  • Check fluid level.
  • Inspect the rear housing for leaks.
  • Remove the cover (if the differential does not have a drain plug).
  • Install new gasket if needed.
  • Fill with new fluid.

Our recommendation:

Differential oil should be changed every 30,000 to 50,000 miles. You should aim to have the gear oil changed every 30,000 miles, but it’s a good idea to have a mechanic check the differential oil during regular maintenance services.

What common symptoms indicate you may need to replace the Differential/Gear Oil?

Gear oil is contaminated with metal particles or other substances.

How important is this service?

The differential is responsible for transferring the power from the engine to the transmission and the wheels, and for controlling how much power goes to each wheel. Like many aspects of your vehicle, the differential requires oil to act as lubrication. Differential oil allows the differential to move smoothly and consistently, which allows the vehicle to continue sending power to the wheels. If the differential oil is old, it may be contaminated with debris and metal shavings. This contamination will come into constant contact with the differential, which can cause severe long term damage to the differential.

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Meet some of our expert Mercedes-Benz mechanics

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Excellent Rating

(19)

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Luther

17 years of experience
57 reviews
Luther
17 years of experience
Mercedes-Benz 420SEL V8-4.2L - Inspection / Diagnostics - Atlanta, Georgia

Patrick

34 years of experience
1579 reviews
Patrick
34 years of experience
Mercedes-Benz 420SEL V8-4.2L - Car is not starting - Pflugerville, Texas
Very good.

Carlos

29 years of experience
601 reviews
Carlos
29 years of experience
Mercedes-Benz 420SEL V8-4.2L - Alternator Repair - Riverside, California
Carlos is chill dude; showed up early and helped me out in under an hour. He also gave me tips on how to become a mechanic. Honestly will book him again if anything happens.

Manuel

13 years of experience
140 reviews
Manuel
13 years of experience
Mercedes-Benz 420SEL V8-4.2L - Oil Pressure Sensor Replacement - Naples, Florida
First class service. Knowledgeable and considerate.

Excellent Rating

(19)

Rating Summary
18
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0
1
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Number of Mercedes-Benz 420SEL services completed
209+
services done by our mechanics
TOTAL NUMBER OF EXPERT Mercedes-Benz MECHANICS
1100+
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