I have recently aquired some fairly new, 8 POT Silver AMG calipers i`m told fit an SL55AMG or SLR. Does anyone know what the pads should look like? as in......... 2 pads/ caliper or 4 pads/ caliper. When a local parts garage got some in for me (£70), there were 4 pads, 2 being smaller, definatly...