300 sd read caliper question

[theolonious]

Went to order a rear caliper seal kit today for the left side on my 82 300 sd.

They want to know which style of brakes I have, Bendix, ATE, and another that I dont remember.

Are the seal kits interchangeable and if I decide to replace the caliper does it matter which manufacturers caliper I choose. Does a bendix need to replace a bendix or are they all interchangeable.

If it matters which style I choose then how do you determine which style is on the car. They all pretty much look the same.

thanks