E320 '94 Cab Horn question
 

Have searched thorugh the archives & didn't find my question addressed...

I need to replace the lower of the two horns on my '94 E320 Cabriolet as it just makes a "tup" sound when I try it--the upper horn is fine. Which frequency is the [physically] lower horn?

Established that the problem is the horn and not wiring. I reversed the two leads from the working [upper] horn down to the lower horn & the lower still didn't work. Also verified the wiring by testing the lower 2 leads on the upper horn & it still worked fine.

I've seen units for sale listing the 500Hz 433Hz combos & also a 433Hz 300Hz combos. But if I only buy one horn, which should I buy?

Horn frequency
 

If you remove the broken horn, the frequency should be marked somewhere on it. (Maybe you can read it without taking it off) Just buy the same thing & replace. Be sure to tape the leads while the horn is off.
Good luck :)

jaoshea, you were quite right. On the back of the defective horn is listed 405Hz. In fact, on the back of the working horn is 485Hz. So, I ordered the lower frequency horn from Fastlane yesterday & it's already out-for-delivery today! That's great service!!!