I received an email from the shop that was going to do the oil leaks issues as well as other things on the updated checklist. I was informed that the owner had stated that he will not be able to work on my Mercedes. No reason or explanation given as to why he declined to diagnose the oil leaks among other issues as well.

I am tempted to do this work on my own. The problem is trying to find and locating the source and location of the oil leaks. Even though, I already tried the oil dye and using the UV led flash light to pinpoint oil leaks location, I got mixed results and not clearly finding the source and location of the oil leaks. So I ordered a 5M 7mm Endoscope Waterproof Snake Borescope USB Inspection Camera that can connect to my laptop and I could put the camera under the Mercedes while running and hopefully will show some area of the leaks as well as the source of burning and smoking oil. I will follow-up/update on this as soon as I get the camera.