Mercedes-Benz E420 Brake Light Switch Replacement at your home or office.

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Average rating from customers who
received a Brake Light Switch Replacement.
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$123.33 - $133.33

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Average rating from customers who
received a Brake Light Switch Replacement.
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Brake Light Switch Replacement Estimate for Mercedes-Benz E420

Mercedes-Benz E420 Brake Light Switch Replacement costs $129 on average.

CarServiceEstimateShop/Dealer Price
1995 Mercedes-Benz E420V8-4.2LService typeBrake Light Switch ReplacementEstimate$171.67Shop/Dealer Price$213.96 - $294.43
1994 Mercedes-Benz E420V8-4.2LService typeBrake Light Switch ReplacementEstimate$171.67Shop/Dealer Price$214.06 - $294.61
1997 Mercedes-Benz E420V8-4.2LService typeBrake Light Switch ReplacementEstimate$176.67Shop/Dealer Price$217.80 - $297.41
Show example Mercedes-Benz E420 Brake Light Switch Replacement prices

Brake Light Switch Replacement Service

What is the brake light switch and how does it work?

The brake light switch is a mechanical switch activated when you press the brake pedal. The switch has a plunger in it that contacts a lever in the brake pedal assembly. As that plunger is depressed when you push on the brake pedal, the contacts in the brake light switch closed and voltage flows to the brake lights — turning them on. The brake light switch is also in the circuit that controls the cruise control disengagement and the shift interlock safety feature installed on all newer cars. Failure of the brake light switch occurs due to wear on the internal electrical contacts in the switch, poor switch terminal connections, maladjustment of the switch, or damage to the brake pedal assembly.

When to consider replacing the brake light switch?

  • No brake lights. If depressing the brake pedal does not cause any of the brake lights to illuminate, the continuity of the switch will be tested. If only one brake light is out, then the issue is not the switch but rather the bulb, bulb socket or brake light circuit integrity.
  • Unable to shift out of park. The brake light switch is also wired into the shift interlock mechanism. If you are unable to shift out of park, with your foot on the brake, check to see if the brake lights will illuminate as you push the pedal. If they do not illuminate, failure of the brake light switch may be the cause of the no shift.
  • Intermittent operation of the brake lights or late operation. The brake light switch has to be in the proper position, and work consistently if the brake lights are to come on the instant you press the brake pedal. The switch can sometimes require adjustment, or the contacts may degrade, causing inconsistent operation of the switch.

How do mechanics replace the brake light switch?

  • The switch is first tested using a multimeter, including the terminal contacts to the switch, to determine if it is faulty. If the switch is functioning, the entire circuit must be tested to determine the cause of no brake lights.
  • Should the switch be judged defective, the switch is unthreaded from the mounting boss near the brake pedal assembly.
  • The new switch is threaded in and locked with an appropriate locknut once the new switch is properly adjusted.
  • The operation of the switch is tested to ensure instant illumination of the brake lights upon pressing the brake pedal.

Is it safe to drive with a brake light switch problem?

No. Should the brake light switch have failed, it is unsafe to drive the vehicle because drivers behind you will have no indication that you are slowing, intend to slow, or are stopped. Always address a failure of this type promptly to ensure your safety while driving.

When replacing the brake light switch keep in mind:

  • The mechanic will test the brake light switch directly to ensure that the issue is not elsewhere in the brake light circuit.
  • Occasionally, the issue is a maladjusted switch or a loose contact, and the mechanic can resolve the problem without switch replacement.

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Meet some of our expert Mercedes-Benz mechanics

Real customer reviews from Mercedes-Benz owners like you.

Excellent Rating


YourMechanic Mercedes-Benz E420 Service

Average Rating

4.5/5

Number of Reviews

15

Rating Summary
11
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1
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1
11
2
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1

Jesus

15 years of experience
68 reviews
Jesus
15 years of experience
Mercedes-Benz E420 - Pre-purchase Car Inspection - Long Beach, California
I requested a pre purchase inspection for a car about 200 miles away from where I live. Jesus was on time, responsive, and very pleasant to work with. He kept me abreast of his inspection and provided me his professional feedback on the status of the vehicle. He followed up with a comprehensive and easy to understand report of his findings. Awsome service and awesome professional mechanic. Thank you.

Trung

11 years of experience
412 reviews
Trung
11 years of experience
Mercedes-Benz E420 - Oil Change - Fremont, California
Trung arrived on-time and provided excellent service and professionalism throughout! Very relatable person with trust and mechanical skills. Was able to replace air filter and tail-light last minute and give great advice for both cars i own.

Brian

21 years of experience
132 reviews
Brian
21 years of experience
Mercedes-Benz E420 - Oil Change - Springfield, Virginia
It's the second time Brian has worked on my car (I should've left a comment the first time, but forgot). Each time he not only has been efficient, he's been a real professional. We also have a good time while he works. He's worked on my car at home and at my office and no matter where he works, I've been very satisfied. Owning an older model Mercedes Benz, I always worry that others won't treat it the way I feel it should be treated, but Brian does. He's knowledgeable and gentle with every part he handles and every screw or bolt he turns--I appreciate that. If my first two experiences are any indication of the future, my car is in good hands. Thanks Brian.

Ben

40 years of experience
1147 reviews
Ben
40 years of experience
Mercedes-Benz E420 - AC Compressor - Houston, Texas
Friendly and professional. Even pointed out a few problems that another mechanic told me would be much more difficult to trouble shoot.

Excellent Rating


YourMechanic Mercedes-Benz E420 Service

Average Rating

4.5/5

Number of Reviews

15

Rating Summary
11
2
1
0
1
11
2
1
0
1
Number of Mercedes-Benz E420 services completed
165+
services done by our mechanics
TOTAL NUMBER OF EXPERT Mercedes-Benz MECHANICS
900+
experts on our platform

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