i need to make a trip to fix the car. I was told the rear brakes are grinding, one pad is down to metal, so I ordered new pads and rotors, but i was told that one caliper may need to be replaced as well.

I know calipers need to be replaced in pairs, and really hope i don't have to replace either of them, but in case I do, I'd like to be prepared. Do I likely have ATE or bendix on that car? I've had them unmounted once before when I changed the rear sway bar end links but don't have the car nearby me yet.

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1999 210 e300
1995 SL320
2006 E320CDI
previous
1985 126 300SD
1982 123 300TD
1995 140 s600
1969 gto cabriolet
some VW tdi's
1990s saab 9000 aeros
1991 celica GT4 st185
lots GM