Mercedes-Benz C400 Horn Relay Replacement at your home or office.

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Horn Relay Replacement Service

How much does a Horn Relay Replacement cost?

On average, the cost for a Mercedes-Benz C400 Horn Relay Replacement is $107 with $12 for parts and $95 for labor. Prices may vary depending on your location.

CarServiceEstimateShop/Dealer Price
2015 Mercedes-Benz C400V6-3.0L TurboService typeHorn Relay ReplacementEstimate$139.09Shop/Dealer Price$162.62 - $193.82
Show example Mercedes-Benz C400 Horn Relay Replacement prices

What is the Horn Relay all about?

The horn relay attaches a low power circuit to an electromagnet, which operates a mechanical switch. That switch either opens or closes a circuit that carries a higher power, which causes the horn to sound. There is a low power circuit running to your car’s steering wheel, and when it is activated, the horn sounds. When you release the horn button, the low power circuit is opened and the power level of the relay drops, silencing the horn.

Keep in mind:

  • You are required by law to have a working horn in your car.
  • Your car horn is a safety mechanism that allows you to warn other drivers of potential danger.

How it's done:

  • The vehicle battery is disconnected
  • The horn relay position is identified
  • The new horn relay and wiring are installed
  • The battery is reconnected
  • The repair is verified and the vehicle horn is tested for proper operation

Our recommendation:

If your horn isn’t working properly, you have no way of alerting another driver that he or she is about to collide with your vehicle, and you have no way of telling other drivers of any dangers further down the road. Our expert mechanics can diagnose any problems with your car horn, and if necessary, can replace the horn relay for you.

What common symptoms indicate you may need to replace the Horn Relay?

  • You press the horn button and nothing happens
  • You press the horn button but all you hear is a click
  • Horn only works sometimes

How important is this service?

Your horn is your first line of defense when it comes to problems in traffic. With an inoperable horn relay, your horn won’t work at all. If your horn isn’t working properly, get one of our expert mechanics to immediately correct the problem.

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Meet some of our expert Mercedes-Benz mechanics

Real customer reviews from Mercedes-Benz owners like you.

Excellent Rating

(5,730)

Rating Summary
5,332
192
54
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5,332
192
54
29
123

Nazareth

27 years of experience
294 reviews
Nazareth
27 years of experience
Mercedes-Benz C400 V6-3.0L Turbo - Car Battery Replacement - Glendora, California
He was very fast and his prices are extremely reasonable

Charles

34 years of experience
342 reviews
Charles
34 years of experience
Mercedes-Benz C400 V6-3.0L Turbo - Back To School Promo - Austin, Texas
He has done a great job in the timely manner. I would definitely recommend him.

John

27 years of experience
1057 reviews
John
27 years of experience
Mercedes-Benz CLA250 L4-2.0L Turbo - Oil Change - Pearland, Texas
My experience was beyond amazing. There is not a word I can use to express my experience other than it was amazing ×100. This is the type of service I wish everyone I ever have to encounter displays. This man is going to be my go to from now own, until he retires. Just awesome.

Andrew

11 years of experience
872 reviews
Andrew
11 years of experience
Mercedes-Benz C230 V6-2.5L - 104,000 Miles Maintenance Service - Gardner, Kansas
Total professional and very good at his job. Will request him again for all future vehicle services.

Excellent Rating

(5,730)

Rating Summary
5,332
192
54
29
123
5,332
192
54
29
123
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