All steering buttons and horn stopped working?

2010 MERCEDES BENZ C180

182,000 MILES • AUTOMATIC

MVULAZ MHLOPHE SONDIYA

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I took a car to the mechanic on the 12th of October, and they changed a computer box. It came back fine but after 2 weeks all buttons in the steering stopped working together with the horn stopped working. The lights in the dash are on but cannot be changed if I press buttons in the steering. What could be the problem?

Nov 2, 2022 at 10:52 PM

Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.

CARADIODOC

CAR REPAIR CONTRIBUTOR
34,308 POSTS

You're describing the typical symptoms of a broken clock spring. That's a wound-up ribbon cable in a plastic housing under the steering wheel. This article does a better job of explaining how they work:

https://www.2carpros.com/articles/symptoms-of-a-bad-airbag-clock-spring

If you want to replace it yourself, take a look at this article first:

https://www.2carpros.com/articles/steering-wheel-clock-spring-removal

Other car models are similar. I only have access to service information for models sold in the U.S. If you need instructions for your model, I'll post them for something similar.

Nov 3, 2022 at 10:48 AM