Bought a set of C63 AMG calipers (at least allegedly) a couple of weeks ago. After my search for a set of big calipers they should have 34/36/38mm pistons but mine have 32/34/38. The calipers are red (which I thought was only on C-class?).

Did C63 calipers came with two different pistons sizes? If not, what kind of car are my calipers from?

I paid with PayPal so I'm considering filing a dispute to get them delivered back to the seller. He hasn't responded to my question regarding the wrong piston size.

 

They may be the ones from the C63 and not the C63S. C63S has larger rotors and calipers than the C63.

 

C63 non S (W205) are not painted red though. Could they be from W204?

 

Shot, I've posted in wrong forum. Yes, I meant calipers from W204. W205 has nothing to do about my concern.