The life of my discs, both front and rear, are over. I'm looking at changing over to EBC Ultimax Slotted Performance Brake Discs, with either EBC Redstuff or EBC Yellowstuff pads. I have a few questions regarding this upgrade, as to be expected. Will this upgrade make a significant difference in braking performance, and which of the two brake pad sets would be better for road use? I don't plan on going on any track days, so I'd like a balance between performance and durability. I'm also very confident with the procedure for changing both rear and front pads with discs, so I don't need any guidance in those areas. I am however confused with the EBC brake disc pictures I've seen online (links below). Rear: http://www.demon-tweeks.co.uk/perfo...nce-brake-discs-rear-pair-vented-300mm-x-22mm Front: http://www.demon-tweeks.co.uk/perfo...ce-brake-discs-front-pair-vented-312mm-x-28mm Mercedes OEM discs have 4 holes on the disc for alignment and fitting, whereas EBC discs have 6, 4 of which are in line with the OEM discs but 2 smaller holes offset, opposite one another. What's the reasoning for this and will I have all the necessary parts to fit the EBC discs hassle free? Any information or experiences on the EBC discs and pads would be greatly appreciated, Mike.