300TD's (wagons) have different sized rear calipers. I rebuilt mine when I had a sticking/stuck caliper about a year, 30K miles ago, and it is sticking again - like posters above have said. I used my injector pop tester to force the stuck piston out. If your situation is like mine, kind of uncertain, it might not be so simple to rebuild.

The rebuild kit I got from this site, for a 300TD, did not fit, but I was able to reuse the old seals and o-rings with careful and painstaking trimming. No leaks and they worked fine - for a while. I am not sure if in the past someone put different sized rear calipers on my car, or if this site does not have kits for rear calipers. Looking at different sites for rear calipers for a 300TD and local parts stores, it does not appear most recognize there are different sized calipers for the wagons than all the other 300's.

My right rear sticking again, I'm not sure whether I'll try to rebuild again, buy rebuilt, or new ATE. Part of my indecision is not knowing whether I've got the correct calipers on the rear, if anyone has a rebuild kit for rear calipers only used on the wagons, or if whoever I buy a rebuilt one from knows there is a difference.

Does anyone know if a sedan rear caliper will line up with the bolt holes and fit on a wagon?

If not, then this site sold me a rebuild kit it said fit a 300TD caliper that did not fit. Way off. If a sedan or coupe caliper can bolt up to a wagon, then maybe some PO or shop put the wrong calipers on my car, and not knowing that, I ordered the wrong kit.

Anyway, just something to keep in mind with rear calipers on a wagon. If the others fit also, then its probably not a big deal to just replace with whatever you want.

I'm hoping I find out if they are interchangeable too.

Thanks to all you knowledgeable folks out there in advance.

1985 300TD, egr, arv, trap oxidizer delete curtesy of rollguy, 367,000 daily driver