It seems that the original question was why does MB recommend flushing the brake fluid while other manufacturers don’t? The inference being that this must be due to an inherent weakness in MB’s brake system. I think enough information has been provided on this thread as to what happens to brake fluid overtime. The weakness is in the nature of break fluid as the two links below explain. If other manufacturers choose not to recommend flushing then that’s their problem not MB’s for failing to alert their customers. From a business standpoint it makes sense. They get to replace a lot more expensive brake parts than MB owners, who flush their brakes biannually, do. Is MB at fault for alerting their customers or are the others at fault for not including this straightforward procedure as part of their regular maintenance program?
http://www.osbornauto.com/questions/bfluid.htm
http://www.rpmnet.com/techart/fluid.shtml#fluid

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Riadh
'89 560SL Rauchsilber
And what is good, Phaedrus, and what is not good -- Need we ask anyone to tell us these things?