CLK-Class (W209) 2003 on: CLK 270 CDI, CLK 200K, CLK 200 CGI, CLK 240, CLK 320, CLK 350, CLK 500, CLK 550 [Coupes & Cabriolets]

Horn fuse location

Old 07-15-2012, 08:15 PM
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2003 CLK 500
Horn fuse location

Hey everyone,

I have a 2003 CLK 500 and recently discovered that the horn does not work. I don't know if it ever worked, since I just purchased it a few months back. I am trying to figure out where the problem is. The panic button is not working either.

Would someone be able to tell me where the fuse for the horn is located? I am going to run the horns to power and see if they still function. Any ideas? Thanks guys.
Old 07-15-2012, 08:39 PM
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NO LONGER ACTIVE
There are no fuses - the horns use relays #43a and #43b on the front fuse box (under the hood).
Old 07-15-2012, 09:28 PM
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Just tested the horns themselves and they work.

Thanks Rudeney, I'll look for those and test the relays.
Old 07-16-2012, 07:55 PM
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Got it all fixed. Since I could not find a solution to this problem with my googlefu, I will post what I found for future reference for others.

It was a blown fuse...in the 43a and 43b position. The fuse box is located in the engine bay by the firewall, on the driver's side. There is a horn relay also, if the fuse is not the problem...relay 'I' to the right of the fuse.

Horn fuse location-enginefusebox.png
Old 10-14-2015, 06:28 PM
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cls 500
My Horn and steering wheel controls

Hello! My CLS 500 steering wheel controls, horn , etc suddenly stopped working. Any suggestions? Relay, fuses?

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