I have the same problem. It doesn't matter if the brakes are cold or hot, but in reverse with light pressure on the pedal, the rear brakes squeak really loud. I've tried doing a "break-in" with a strong sudden rear stop with no luck. Does anyone else have this problem? If so, what did you do/change to resolve it?
Thanks

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'85 300D 190K miles
running on B100 Biodiesel since 156K, SCRATCH THAT! I can only find Biodiesel at 1 location in Houston! (not very convenient)