I am doing a brake job on my boss's wife's 97 S500 and forgot which pads on the front gets the wear sensor. This car is different from my W126's in that there is only one sensor per side, which pad gets it, the inboard or outboard??

Another strange thing, only one rear caliper gets a sensor and harness, the left rear. Which pad on it gets the sensor?

(I have all OEM parts if it means anything)

Thanks,

Chas