Brake binding W123

My 280e has one rear brake binding a little. Not enough to stop driving but it's getting warm. What are the likely causes for one brake to bind and what ways are there of fixing it?
tia
Antony
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On 2005-02-09 07:05:30 -0800, snipped-for-privacy@rbi.co.uk said:

Usually it's rust or crud that is built up in the caliper sliding hardware. Disassembling and cleaning and lubricating and reassembling may fix it.
On rare occasions this can also be caused by hydraulic issues like a collapsed hose. Usually this would be pretty severe though...
Good Luck, Marty
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Stuck piston inside the brake caliper - or a blocked brake hose to that brake. One can test the latter by "bleeding" the brake caliper on that wheel. If copious amounts of brake fluid come from the bleed screw on light brake application then the brake hose is OK and the caliper ought to be replaced or rebuilt. If not then the hose must be replaced so the brake releases after a stop.
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