Mercedes-Benz GLA35 AMG Brake Light Switch Replacement Costs

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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Jeff

34 years of experience

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by Richard

Mercedes-Benz E430 V8-4.3L - Brake Light Switch - Roseville, California

He is very professional and knows all about auto repair.

Bereketeab

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110 reviews

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by Chris

Mercedes-Benz SLK230 L4-2.3L Turbo - Brake Light Switch - West Sacramento, California

This gentleman was on time and listened very well to my questions and answered accordingly. He displayed a professional demeanor and was well versed in auto mechanics. He was fast and efficient and completed a thorough analysis of my car. I would have this gentleman back to my home again and will request him for further repairs. In addition, I will recommend him and your organization to everyone I know and further, to people I do not know. Knowledgeable, courteous and professional employees are very hard to find these days and it is key to great customer service. I find this mechanic to be trustworthy as well which is also a key characteristic representative of great customer service. Thank you again and I look forward to a continuing business relationship.

Jose

16 years of experience

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by vanetta

Mercedes-Benz CLK320 V6-3.2L - Brake Light Switch - Stockbridge, Georgia

very good job at an expensive cost

Peter

29 years of experience

592 reviews

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by EMILY

Mercedes-Benz SLK230 L4-2.3L Turbo - Brake Light Switch - Los Angeles, California

Peter was so patient and kind and put up with my unendless barrage of questions. He gave me tons of tips on how to save money while keeping my car in top shape. He came early and finished in less than half of his estimated repair time. I can not recommend him enough!!!

Mercedes-Benz GLA35 AMG Brake Light Switch Replacement at your home or office.

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Brake Light Switch Replacement Service

How much does a Brake Light Switch Replacement cost?

On average, the cost for a Mercedes-Benz GLA35 AMG Brake Light Switch Replacement is $173 with $33 for parts and $140 for labor. Prices may vary depending on your location.

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

When to consider replacing the brake light switch?

How do mechanics replace the brake light switch?

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

When replacing the brake light switch keep in mind:

Meet some of our expert Mercedes-Benz mechanics

Excellent Rating

Rating Summary

Jeff

Bereketeab

Jose

Peter

Excellent Rating

Rating Summary

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