....for the rear? I need a new right rear caliper (which I will, of course, purchase from PeachParts) but the parts look-up shows two right rear calipers, one an ATE and the other a Bendix. How can I tell which one I have so's I can order the proper caliper?

Your original caliper will have either name cast into it, though not clearly, but visable on inspection.

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90 300TE 4-M
Turbo 103, T3/T04E 50 trim
T04B cover .60 AR
Stage 3 turbine .63 AR
A2W I/C, 40 LB/HR
MS2E, 60-2 Direct Coil Control
3" Exh, AEM W/B O2
Underdrive Alt. and P/S Pulleys,
Vented Rear Discs, .034 Booster.
3.07 diffs 1st Gear Start

90 300CE 104.980
Milled & ported head, 10.3:1 compression
197° intake cam w/20° advancer
Tuned CIS ECU
4° ignition advance
PCS TCM2000, built 722.6
600W networked suction fan
Sportline sway bars
V8 rear subframe, Quaife ATB 3.06 diff

........but probably have to go ahead and pull the old caliper to do so. DARN, I guess I'll just have to drive the 400E until I get the NEW caliper installed.....or maybe the Wife-type-person will let me drive the SLK? Decisions, Decisions!
But, tell me, is there REALLY any actual difference in the two, between the ATE and the Bendix? Reason I ask is that I supposedly have a pic of each of them and I can't for the life of me tell the difference? Expiring minds like mine need to know.
Thanks for your reply!
Happy Chanukah and a Merry Christmas! HO-HO O Vey!

DAMN! I was going to purchase my caliper from FastLane/PeachParts, until I found out that they want $33.33 to ship a 4 lb. caliper and 4 of the small brake pads (probably another 2 lbs) to Texas. Heck, I can get the caliper and the pads all in a Priority Mail small flat rate box for FIVE BUCKS and send it anywhere in the USofA. THIRTY-THREE dollars. Geeez, guys? Come on.

The brand will be on the front face of the caliper, visible if you remove the wheel. At least it was on ours.