Hello people!

Been going around a particular problem with my s class that has todo with the brake lights constantly being on. I have managed to temporarily fix this issue.

Buckle up here it goes!!

I bought a w220 s430 s class on a very low price due to the car having the airmatic rear shock blown and the electrical problem . After fixing the airmatic shock absorber very easy replacement.. Went and discovered on the forums that rear sam failure is a common problem with the w220's

In order for me to solve the problem i need a rear sam thats compatible with my car, it need to have the same part number.

I've tried searching for the same part but haven't got any luck..

But!

Problem is that with the brake light on in order to move the car one needs to strike the shifter gently.. my hand looks like mighty Thor's hammer.. In order to solve the brake light issue without replacing the sam itself was done by doing some reading around the forums and finding a solution that involved feeding +12volts from cigarette lighter to a cable in the brake light switch.

So to wrap it up the car now does not have the brake light-light "on" but the rear brake lights are constantly ON, which annoys the drivers that are behind me.

Since I bought several brake light switches im willing to attempt a temporal fix that involves on building a switch circuit with the brake lights. But in order for me to build the circuit I would need to know the upper third brake light's resistance so I can then put a resistance of same ohm value to trick the computer..

I would like your help on finding what the resistance of this light it, or perhaps you could tell me the voltage that goes to this light and I can hook my DMM on series with it and use ohms law to know the value of the resistance...

Thanks!