Notice brake pad indicator light blinking? ML55 has about 35k miles and is within factory warranty; however brake pads are a wear item and appears to be excluded? I have a mechanic who works on Mercedes...mostly older models and if special tool(s) required for this brake job he may not have. Is brake pad replacement on the ML55 a complicated process and does it require special tools? Depending on answer may opt to have mechanic do work vs. high cost dealer!!