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Mercedes-Benz S420 Windshield Wiper Motor Replacement at your home or office.

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Windshield Wiper Motor Replacement Service

How much does a Windshield Wiper Motor Replacement cost?

On average, the cost for a Mercedes-Benz S420 Windshield Wiper Motor Replacement is $951 with $545 for parts and $406 for labor. Prices may vary depending on your location.

CarServiceEstimateShop/Dealer Price
1994 Mercedes-Benz S420V8-4.2LService typeWindshield Wiper Motor - Rear ReplacementEstimate$1539.12Shop/Dealer Price$1829.80 - $2660.71
1999 Mercedes-Benz S420V8-4.2LService typeWindshield Wiper Motor - Front ReplacementEstimate$1542.19Shop/Dealer Price$1824.54 - $2649.22
1997 Mercedes-Benz S420V8-4.2LService typeWindshield Wiper Motor - Front ReplacementEstimate$1542.19Shop/Dealer Price$1824.68 - $2649.46
1994 Mercedes-Benz S420V8-4.2LService typeWindshield Wiper Motor - Front ReplacementEstimate$1512.99Shop/Dealer Price$1794.82 - $2619.11
1999 Mercedes-Benz S420V8-4.2LService typeWindshield Wiper Motor - Rear ReplacementEstimate$1542.19Shop/Dealer Price$1832.67 - $2663.43
1995 Mercedes-Benz S420V8-4.2LService typeWindshield Wiper Motor - Rear ReplacementEstimate$1542.19Shop/Dealer Price$1825.44 - $2650.78
1998 Mercedes-Benz S420V8-4.2LService typeWindshield Wiper Motor - Front ReplacementEstimate$1542.19Shop/Dealer Price$1824.76 - $2649.60
1996 Mercedes-Benz S420V8-4.2LService typeWindshield Wiper Motor - Front ReplacementEstimate$1542.19Shop/Dealer Price$1824.67 - $2649.44
Show example Mercedes-Benz S420 Windshield Wiper Motor Replacement prices

What is the windshield wiper motor and how does it work?

The windshield wiper motor is a small electric motor. A shaft coming out of the motor connects to a linkage/transmission assembly that converts the rotary shaft movement of the motor to the linear, back-and-forth motion of the wiper arms across the windshield. In addition to the windshield wiper motor in the front, some SUVs, vans, hatchbacks and station wagons have an additional wiper motor mounted in the tailgate to keep the rear window clear.

When to consider replacing the windshield wiper motor?

  • No wiper function at all. Windshield wiper motors can fail, but prior to replacing the motor, the mechanic will check its power supply.
  • Wipers don’t park in the down position. There is an internal switch in the wiper motor that keeps the motor powered after you have shut it off to ensure the wipers park in the right spot. If that switch fails, the wiper motor must be repaired or replaced.
  • Erratic or slow wiper operation. If the electric motor or the transmission have worn excessively, you might experience erratic, intermittent, or slow wiper operation.
  • Grinding or clunking noises. Excessive wear in the motor transmission or wiper linkages may cause noise. A mechanic will determine the cause of the noise before performing repairs.

How do mechanics replace the windshield wiper motor?

  • Remove the cowl and any covers over the wiper motor and transmission assembly.
  • Remove the plug harness to the motor and disconnect the wiper transmission arm from the wiper motor.
  • Remove the bolts holding the motor and transmission assembly to the body of the car.
  • Install the new motor. The plug harness is usually keyed so it can only be inserted in one direction. If not, the proper polarity must be observed. Bolt the motor to the car body.
  • Cycle the motor several times by turning it on and off to establish the park position, then re-attach the linkage transmission assembly to the wiper motor.
  • Install all covers, cowling, and so forth and test operation of the motor on a wetted glass only.

Is it safe to drive with a windshield wiper motor problem?

Yes. So long as the weather is clear and there is no rain, snow, or ice, it is safe. However, if the wiper motor is not functioning properly driving in adverse weather conditions is quite risky and may even be impossible in heavy rain, which will often completely obscure your view through the windshield. Due to the unpredictability of the weather, it is always best to have the windshield wiper system in good working order.

When replacing the windshield wiper motor keep in mind:

  • Never turn on the wipers if the windshield wiper blades are frozen to the windshield or their path is blocked by snow or ice.
  • When the wiper motor is replaced, all the linkages in the wiper system should be lubricated.
  • The rubber inserts in the wiper arm have a lifetime of about 1 to 2 years. Replacing the inserts regularly will make it safer to drive in adverse weather.

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Number of Mercedes-Benz S420 services completed
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services done by our mechanics
TOTAL NUMBER OF EXPERT Mercedes-Benz MECHANICS
1100+
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Meet some of our expert Mercedes-Benz mechanics

Real customer reviews from Mercedes-Benz owners like you.

Excellent Rating

(15)
Rating Summary
14
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Manuel

13 years of experience
140 reviews
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Manuel
13 years of experience
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by Darina
Mercedes-Benz S420 V8-4.2L - Car is overheating - Naples, Florida
Very prom and good mechanic .

Melvin

18 years of experience
221 reviews
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Melvin
18 years of experience
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by Bervin
Mercedes-Benz S420 V8-4.2L - Trunk does not lock or open - Atlanta, Georgia
I am a independent private driver, and my trunk, passenger doors, engine light, sunroof all began to malfunction at the same time on my s500 Mercedes Melvin came out in the cold and in 30 minutes knew exactly what all the problems were. His knowledge is superb! I will be using Mr Melvin again.

ALAA

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

Luis

5 years of experience
302 reviews
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Luis
5 years of experience
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by Charletta
Mercedes-Benz S420 V8-4.2L - Car is not starting Inspection - Richmond, Virginia
Luis is excellent! He knows his craft! I have requested him again!

Excellent Rating

(15)
Rating Summary
14
0
1
0
0
14
0
1
0
0
Number of Mercedes-Benz S420 services completed
165+
services done by our mechanics
TOTAL NUMBER OF EXPERT Mercedes-Benz MECHANICS
1100+
experts on our platform
Yourmechanic was featured in

New York Times NBC CBS Forbes INC Tech Crunch

Learn more about us

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