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Discussion Starter #1
I installed this air horn couple weeks ago. Really awesome and loud thing! I was replacing my head lights and had to take off the grill so I took some pictures along the way. Will take some later to show how and through where I pulled the air hose.

Things you need:
1) Air horn/chime itself. (was free for me ;))
2) Air compressor kit. (Can look up one at Hornblasters.com) I got 2 gallon 150 PSI one with safety valve at 175 PSI ($150-$200)
3) Air brake hose. Remember!!! You will need a heavy duty plastic air brake hose!!! It's not really bendable but it works best! Believe me, I tried the rubber one and it just blows up because of the constant air pressure (yes, the hose will be under constant air pressure!) or heat generated by the engine or exhaust pipe. I got mine from the local stereo store which was also selling train horn kits. $1 for feet. I needed 21.5 feet. so my total was $21 Remember! DO NOT Bend that hose too much, since if it bends it totally blocks the air supply and you will need to cut the hose where it bended :-( Thus, you may find yourself short of the hose and run to the store to spend some money again!
4) Electric Solenoid Valve (aka Release valve with quick-connect) Mine was free from my friend ;) They cost anywhere between $15-$40
5) Zip ties (were free for me)
6) Screw driver. (cross-point screwdriver, and flat head)
The air chime was given to me by my friend, so I can't give you the price or place where you can find single one. Try Hornblasters.com, Ebay or Amazon or Google =)

First thing you need to do is to remove the grill to mount air chime itself. Mine was big single one, so I had to bend the end round part of it since the grill didn't sit in place :-D


All I used for mounting were zip ties. I didn't use any screws or drilled any holes. It doesn't get THAT hot, so zip ties melt. You'll be alright.

Then you need to pull the air hose itself. Start from the trunk. Remove the trunk liner, spare tire, and there will be a round rubber drain plug. Remove it and there will be a perfect hole through which you can pull your air hose and power cable (for the air compressor).
Then I secured it with zip ties underneath the car, lining it gently under the plastic "skirts" on the driver's side of the vehicle. After you approach the front driver's side wheel there will be a "perfect hole" running into the "underneath the hood compartment". From there the hose fits nicely between the headlight and the radiator.


Then, connect the hose to the Solenoid valve. The other end of the solenoid valve connects to the air chime hose itself. The "release valve" I used was given to me by my friend and it uses quick-connects on both ends which makes fitment of hoses really easy. I supplied the power to the solenoid valve in parallel from my stock horns. So, after I press the horn, my stock horns work and the current is directed to the solenoid valve as well, thus releasing the air into the chime!







I also pulled the power cable for the compressor through the trunk hole all the way underneath the car to the battery. I also used zip ties to secure it.
It's really simple and requires about 30-50 minutes of your time if you have all the right tools! The main thing is to find a single chime :) that will fit in this small type of car!
Will keep this post updated with more pictures to show you how it went underneath the car!
 

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Administrator 2009 SLK 55 AMG/Founding Member 2006
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durk, when u getting your train horn?
 

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Discussion Starter #5
Thanks for the compliments gentlemen! I know it's not really clean install but there's almost nowhere to drill besides the radiator itself :biglaugh: or the OEM horn metal mounting plate.

Livefreeordie, I also thought it would block too much incoming air and was very skeptical, but gave it a try out of curiosity. To my surprise it doesn't block any air at all. My temperature sensor stayed the same as it was before. Around 90 degrees, right in the middle. Even in this Houston heat (gosh...110)! I did sacrifice a little bit of space in the trunk =) Although I didn't remove my spare tire. I just did a trunk liner mod as it was described in thread on Benzworld. It's like a door which opens in order to access spare tire, thus, eliminating the need to remove the whole liner.:rb MB could have thought of it ;)

And Durkatlon, I think it should be on your project list =)))))
 

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your right it's not really clean....lol If i were to mount an air horn i would mount it here on the left side behind the wheel :) found this place when i had it apart and i took a picture to keep in mind for the future :biglaugh: I just installed this "outlaw" kit on my friends f-150 and was very pleased! It's loud! Here's a picture of the spot! :tu: By the way that spot behind the fenders was really rusting bad, Mercedes put chalk on the seems than primed it! What were they thinking? :confused: So i took it off and reprimed it and chalked it :) Much better and no worrys!
 

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your right it's not really clean....lol If i were to mount an air horn i would mount it here on the left side behind the wheel :) found this place when i had it apart and i took a picture to keep in mind for the future :biglaugh: I just installed this "outlaw" kit on my friends f-150 and was very pleased! It's loud! Here's a picture of the spot! :tu: By the way that spot behind the fenders was really rusting bad, Mercedes put chalk on the seems than primed it! What were they thinking? :confused: So i took it off and reprimed it and chalked it :) Much better and no worrys!
Great job Bradley! Unfortunately area behind the wheel is not enough to install combined air chimes. One still needs to get single ones. And I also was in doubt that the chime will be in enclosed area, thus distorting/reducing the sound...
 
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