Originally Posted by Tim_in_Calgary
I am afraid there is no end result that works. The only reprieve is to spray a strong stream of water directly into the brake calipers. The squealing goes away for a while only. The other option is to stand on the brakes at high speed to clean off the glazing, but that too is only temporary.
I've had this issue forever. The shop that worked on my car said they tried EVERYTHING (and this was an AMG-certified mechanic). It's the most annoying thing pulling up in a $100K+ car and the brake squealing like a pig. I took matters into my own hands as I always have to do as the mechanics never try everything and really don't care and like to tell you that this is just the way it is ("normal").
I've attached a quick deck with instructions and pictures on how to fix this. I have a*2012 CLS 63 AMG*with the red caliper brake systems (not the carbon ceramics). These instructions are specific to my car but I'm sure can be utilized for any Benz. I only did the front brakes and that seemed to quiet them down. Pretty much you just have to lubricate all parts that have metal on metal contact. Also, make sure to clean all parts with BrakeKleen or any degreaser/parts cleaner. I used the Permatex Ceramic Extreme
brake lubricant. You want to lubricate the*caliper pins, the metal*caliper bracket, the*backs of the brake pads*and the*area of the caliper*where the pads insert (metal to metal contact). Be careful*NOT TO GET*lubricant on the rotors or brake pad material. If you do, use a degreaser to clean it up. Assemble everything back and you should be good to go.
I have completely eliminated that annoying squeal. If you bed your brakes in per the above instructions and also lubricate the parts, you should eliminate the squeal entirely.
I'll be glad to answer any questions here or PM me. I thought I would share with all of you as I had a very hard time finding a*thorough*answer or fix.
Hope this helps at least one frustrated Benz owner.