Mercedes W203 C200 Brake Pad Wear Message Issue

Hi,

Maybe someone can give inputs on what else I can check. Unit is a personally owned vehicle.
The brake pad wear message does not turn off even with new pads, rotors, and brake wear sensors.
I have checked the sensor lines and they are good. They go directly to the ESP module.
I have swapped esp module with a used one and get the same message. I don't have a wear sensor on the rear tires.
Anything else to check?

Thanks.