i have a 1992 240 wagon with ABS. the service panel on my car claims i have Girling front, and ATE rear calipers. from looking at bentley and many posts in the archives, i have concluded that the calipers in an ABS system only have 1 bleeder per caliper? is this accurate? the bleeding sequence for ABS mentions nothing about different bleeders on the same caliper?

my concern is it looks like the first caliper i tried to bleed has at least 2 bleeders (inner and outer near top of caliper)??? im wondering a PO put the wrong type of caliper on the car?

re: "...the first caliper i tried to bleed has at least 2 bleeders (inner and outer near top of caliper)...."

First, look carefully: "at least 2" isn't the answer -- you've either got one or three (there is no caliper with just two bleeders)! If the former, you've got the right caliper; if the latter, you've got the wrong one.

As Bruce has explained, if you've got a pre-ABS caliper, you've been cheated -- the car is only using 50% of its front braking capability.

And this may not be as simple as an "as is" sale -- rather than merely a broken part that was not disclosed to you, this is deliberate cover up of a defeated safety system -- i.e., that actually defeats the ABS system! There could have been considerable liability on the previous owner if you were in an accident as a result of your brakes and/or ABS failing.
Further, I'd submit that you may have recourse to sue the previous owner in court (and a good chance to win in small claims court if you prepare properly) for selling you a car with a deliberately incorrect part of your brake system. Safety is something that courts take seriously -- there is clear evidence of such action when a wrong part is installed and it has to be modified (half the caliper's circcuits blocked off) to make it appear to work. The P.O. should be made to reimburse all your expenses to restore the car to the way it should be!
I'd consult a lawyer -- there may be civil (tort) remedy in your state.

I believe ABS was standard by '92, and you should have just 1 bleeder (and correspondingly, just 1 hydraulic line) to each caliper.

If your calipers have 3 bleeders (1 top-inner and 2 middle-inner and outer) you have the pre-ABS caliper. And if there is just 1 line feeding it, with the 2nd port blocked off, it's only working 50% — 2 of the 4 pistons doing nothing.
--
Bruce Young
'93 940-NA (current), 240s (one V8), 140s, 122s, since '63.