Mercedes Benz repair: Front Brake 190 e 2.6[drivers side], warped rotors, squeal

Question
Hi I don't know if you deal with Brakes but I thought that i would ask; I have a loud squeal from this one front break, I had the breaks done on Thurs 02/26 and to my horror It is still there Rotors were done and my mechanic is very good; but I am wondering if you know of any idiosyncrasy that might cause this in the same brake.I might add that this has been ongoing for over a year and two sets of brakes.
Any suggestion is worth a try. Thanks, Allan.

Answer
The pads can cause squealing. If they are extremely hard they will squeal. That is why most techs replace the pads with a softer material. It does not last as long but it is quieter and stops better. There is also an anto squeak application that must be used when installing the new pads. Warped rotors can also cause this problem.