Just to follow up on the issue. The new brake pads works fine but the yellow icon on the dashboard still show solid yellow light indicating the brake pad wear sensor is on. I asked some people about that. Some say, like the last messge above, the sensor is making contact with metal. Can the brake pad wear sensor be remove without taking the new brake pads off? The mechanic I spoke to said sometimes. Is it safe to drive the mercedes with the yellow light on even though with new brake pads on all four wheels? I still have not taken the mercedes to the shop at this time because I am getting all kinds of different answers to my issue. I want to make sure to make the right decision before I decide what to do. Any comments/feedback is greatly appreciated.

It is possible to remove the wear sensor without removing the pads. Some mechanics may balk at such a tricky procedure, because the sensor can break during removal.

I finally solve the problem with the dashboard yellow light (brake pads wear sensor). I took off the left front tire (driver's side). I saw the caliber and two white wires. One of the wires was EXPOSED showing the copper wiring. I proceed to put on the electrical black tape over the exposed wire. I follow the trail of brake pads wear sensor cable to the inside of the hood facing the left corner (driver's side). The connector was loose to the cable and I hooked it together. I noticed how the sensor snapped on the outer edge of the brake pads. I can see why mechanics don't want to pull out the sensor due to possible breakage on the end tip of the sensor that goes on the outer edge of the brake pad. In any event, after that was done with the taping, I started the car and the yellow light on the dashboard was gone!! Funny though, the brake pad wear sensor was made of solid metal and the ones that I saw for sale are plastic made. I wondered if the plastic made brake pad wear sensor are just as good and long lasting as the metal ones. Just curious on my end. Now I know what to see and look for after hours of researching and reading the forum. Thanks for all those who took the time reading and responding to my issue.