Just a couple quick questions: Of all the different brake pad types, are ceramic pads the least prone to brake squeel (think nails scraping on a black board)? I have a perpetual issue with brake squeel on my '00 300m (they can squeel cold, hot, even really slow speed). Tried many things, can't eliminate it. Hence my question about ceramic pads. Second question: True or false - a strong magnet won't be attracted / stick-to ceramic pads (or will feel weak attraction to the backing plate) vs metallic / semi-metallic pads? If I'm going to buy ceramic, don't want to be conned and find out they're semi-metallic.