Iron or aluminum front calipers 95 SL600 ?

[97 SL320]

I bought a set of front calipers that were supposed to be from a 95 SL600 but they are iron. All of the ones I've seen for a SL600 look to be aluminum Brembos. Were the early SL 600 cars using iron? If I use rock auto and look up a 95 SL600 it shows aluminum brembos, the 95 S600 shows the iron ones I have.

Did the Silver Arrows cars in the late 90's get the Brembos?

The front part of the VIN is WDBFA76E1SF113XXX The 76 should make it a SL600.

Thanks