Told car had defective caliper when 1 pad was below2mm and the other 3 at 8-10mm

Hi, This is actually very common in Mercedes Benz Brakes, I see this all the time. There is nothing wrong with the brake components, I would follow the Dealership's advise and change the Brake Pads & Rotors. Also make sure you have had a Brake Fluid Flush in the past 2 years, if not this would be highly recommended. Drive Safe. Thanks for posting. Sam Boca-Star Services & Repairs, Inc. 561-237-5700

I would change the brake hose on that side ,when the rubber wears inside it make a 1 way valve inside it , I think its not shot but it could Be making that caliper lazy to release ,it could be defective...

Just a thought from a lowly Honda 'tech' (I use that phrase loosely) , but I run into that scene a lot on Accords and civics with people that commute in a lot of stop & go traffic and make aggressive left turns during the commute (same on left inner , with aggressive right turns). Have verified this with the owners /drivers of the cars. I would think that you would not need rotors though , unless your pad wore to the metal.