Thanks for replying.
Actually, it the Service Advisor who rejected me outright about the brake noise when I describe to me as given the reason which I have stated. It is a very loud braking noise and I just raised up to the Service Advisor and ask him whether it is caused by new brakes pads, but he said it is permanent as it is a smaller 'floating type' of brake calipers used in C180. That why I wanted to ask if any brudders here driving C180 have the same brake sound. If so, it very very unclass of a merc as the sound is quite loud when you are just braking under slow speed.
The blurred windscreen is not caused by condensation as what I meant is that even with the wipers activated at full speed under heavy rain, the water smears right away on the windscreen without even a second of clear vision. Again Service Advisor said doing a ceramic coating would help the repellency of the water and thus assist the wipers. I was like, a brand new merc still need assistance from some aftermarket chemical to resolve this issue. Hmmm........