I have a parts car im still stripping parts from. I realized it has two horns still and decided to put them on the 300SD. Id imagine the best way to add more horns while keeping the stock ones is to either go in parallel with the current horns or use a relay tied to one of the horns so that I can get optimum amount of current. Is anyone familiar with the circuit and does it have capacity for more current (if I was to go in parallel)?


Since a relay is wiser where can I find a nice simple relay on a w123? I don't want to buy any of the parts to do this I'm pretty sure I don't have any more of those ice cube relays laying around and I don't think those can handle much current.


Thanks

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1981 300SD 512k OM603

My W126 had the dual note horns and factgory dash switch for each of these, the town horn which sounded like a loud VW bug horn, and a wimpy country horn, utterly inappropriate for a big Mercedes like yours.

So, I went and bought 2 Cadillac horns from the Cadillac junyard on junkyard row in Rancho Cordova. I am sure you know where it is. Close to you, not far away.

Mounted them just ahead of the wheel wheel on the right side, perfect place for them.

Now I flip the dash horn switch to country, and the 2 Cadillac horns give a train like blast, without the need for airhorns and compressor setup.

It's highly satisfying, very cheap (about $15 A HORN) and a nice upgrade, and you can still keep the VW bug horn note if you want to use that sometimes

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1991 560 SEC AMG, 199k <---- 300 hp 10:1 ECE euro HV ...

1995 E 420, 170k "The Red Plum" (sold)

2015 BMW 535i xdrive awd Stage 1 DINAN, 6k, <----364 hp

1967 Mercury Cougar, 49k

2013 Jaguar XF, 20k <----340 hp Supercharged, All Wheel Drive (sold)