logo

Mercedes-Benz 420SEL Rear Window Defogger Switch Replacement at your home or office.

Our mobile mechanics offer services 7 days a week. Upfront and transparent pricing.

Estimate price near me

Service Location

Customer Ratings

(18)

Included for free with this service

Online Booking

Mechanic comes to you

12-month / 12k-mile warranty

Free 50 point safety inspection

Our certified mobile mechanics can come to your home or office 7 days a week between 7 AM and 9 PM.

See availability

Customer Ratings

(18)

Rear Window Defogger Switch Replacement Service

How much does a Rear Window Defogger Switch Replacement cost?

On average, the cost for a Mercedes-Benz 420SEL Rear Window Defogger Switch Replacement is $138 with $43 for parts and $95 for labor. Prices may vary depending on your location.

CarServiceEstimateShop/Dealer Price
1989 Mercedes-Benz 420SELV8-4.2LService typeRear Window Defogger Switch ReplacementEstimate$201.93Shop/Dealer Price$241.17 - $319.50
1991 Mercedes-Benz 420SELV8-4.2LService typeRear Window Defogger Switch ReplacementEstimate$181.93Shop/Dealer Price$221.20 - $299.55
1987 Mercedes-Benz 420SELV8-4.2LService typeRear Window Defogger Switch ReplacementEstimate$181.93Shop/Dealer Price$221.20 - $299.55
1986 Mercedes-Benz 420SELV8-4.2LService typeRear Window Defogger Switch ReplacementEstimate$181.93Shop/Dealer Price$221.16 - $299.48
1990 Mercedes-Benz 420SELV8-4.2LService typeRear Window Defogger Switch ReplacementEstimate$181.93Shop/Dealer Price$221.22 - $299.60
1988 Mercedes-Benz 420SELV8-4.2LService typeRear Window Defogger Switch ReplacementEstimate$181.93Shop/Dealer Price$221.20 - $299.55
Show example Mercedes-Benz 420SEL Rear Window Defogger Switch Replacement prices

What is the Rear Window Defogger Switch all about?

The rear window defogger is a grid of surface-mounted wires on the rear window of your car. Electricity runs through the grid and the wires create heat that melts snow and ice from the window and clears moisture that fogs up the glass. The power for the rear window defogger is controlled by a switch at the driver’s discretion, and automatically turns off after a set time. The rear window defogger switch lights up when in use to show when the system is active. If the rear window defogger switch fails to complete a circuit or gets stuck, the rear window defogger will not operate.

Keep in mind:

  • Always be careful when driving in inclement weather.
  • It is wise to clear snow from the rear window before letting the defogger handle the rest.

How it's done:

  • The fuses are checked and dash trim panel is removed for access to switch
  • The defective rear window defogger switch is tested and removed
  • The new rear window defogger switch is installed
  • The dash trim panel is reinstalled
  • The rear window defogger is tested for proper operation

Our recommendation:

The window defogger switch doesn’t require attention unless the rear defogger system is not working at all. If you suspect the rear window defogger switch is faulty, have it tested and replaced by one of our expert mechanics.

What common symptoms indicate you may need to replace the Rear Window Defogger Switch?

  • Rear window defogger simply isn’t clearing the window
  • Defogger works intermittently
  • Defogger button doesn’t light up

How important is this service?

The rear window defogger switch is crucial for maintaining visibility through the rear window. If the switch fails, have it replaced promptly.

Fast and easy service at your home or office

Backed by 12-month, 12.000-mile guarantee

Number of Mercedes-Benz 420SEL services completed
198+
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

Meet some of our expert Mercedes-Benz mechanics

Real customer reviews from Mercedes-Benz owners like you.

Excellent Rating

(18)
Rating Summary
17
0
0
1
0
17
0
0
1
0

Erick

10 years of experience
182 reviews
Request Erick
Erick
10 years of experience
Request Erick
by Brent
Mercedes-Benz 420SEL V8-4.2L - Oil Change - Palo Alto, California

Marco

29 years of experience
244 reviews
Request Marco
Marco
29 years of experience
Request Marco
by Alfredo
Mercedes-Benz 420SEL V8-4.2L - Neutral Safety Switch - Riverside, California
A life-saver

Pardeep

21 years of experience
1121 reviews
Request Pardeep
Pardeep
21 years of experience
Request Pardeep
by Gerardo
Mercedes-Benz 420SEL V8-4.2L - Brake System Flush - Cupertino, California
Excellent communication, fast, accurate, and knowledgeable.

Carlos

28 years of experience
525 reviews
Request Carlos
Carlos
28 years of experience
Request Carlos
by Laszlo
Mercedes-Benz 420SEL V8-4.2L - Serpentine/Drive Belt - Ontario, California
Carlos came on time (unlike others who cancelled the appointment several times). He came, TWICE because of my car needed more parts than expected. Great job, friendly, very professional, I HIGHLY recommend him, and will make sure next time - if needed - he will be the one I ask for. Thank you Carlos

Excellent Rating

(18)
Rating Summary
17
0
0
1
0
17
0
0
1
0
Number of Mercedes-Benz 420SEL services completed
198+
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

Recent articles & questions

How Can I Prevent Door Seals From Leaking?
When When your car door seals leak, it’s more than just a passing nuisance. Water damage can occur to your interior, necessitating the replacement of upholstery or other components. In nearly every instance of leaking car door seals, which you...
Read more
How to Transfer a Car Title in Nebraska
The The title to a car shows who owns it. When that ownership changes, the title must be transferred to reflect this. Title transfers are needed whenever buying or selling a car, as well as when a car is being...
Read more
How to Replace a Camshaft Seal
Camshaft seals are round, rubber oil seals between cylinder heads and valve cover gaskets. Worn out cam seals need to be replaced to prevent oil loss.
Read more

I have continuity between my positive and negative terminals with no battery in

It is certainly possible that you have continuity even with the alternator removed. Things like clocks, digital radios with memory, alarm system, and even some modules always pull power from the battery when the vehicle is turned off. That will...
Read more

how long can it take to change valve cover gaskets on 2003 Lincoln aviator 4.6litre

Hi there. The book time calls for approximately 3.5 hours to complete the replacement of both valve cover gaskets. But this will vary by mechanic, but this is the average book time. If you need to have them replaced, consider...
Read more

What does error 59 indicate on a Toyota platz 2001 model?

Hi there. Unfortunately, the Toyota Platz is a vehicle sold outside of the United States and has different error codes specific to the country of sale. Since we only offer technical advice on US sold cars, trucks and SUV's, we're...
Read more
  1. Home
  2. Estimates
  3. Mercedes-Benz
  4. 420SEL
  5. Rear Window Defogger Switch Replacement

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1 (855) 347-2779 · hi@yourmechanic.com

Read FAQ
GET A QUOTE