Just called around here in the Knoxville TN area for the price of an SBC brake flush on my 06 E320 CDI. Was quoted $210 and $130 by two independent shops and $96 by the MB dealership. Never expected that!
Let us know if they really stick to that quote! That sounds more like a standard brake flush than a SBC system. $225 is the cheapest a stealership will do it around here with independents wanting $125.
I've been getting mine flushed at the stealership since 2007. Just got it done yesterday as a matter of fact. During my discussion with the service coordinator manager, he told me the "official" flush recommendations is 2 year or 20K miles, whichever comes first. I knew about the 2 years, which makes perfect sense and I've followed that. But the 20K mile thing was new to me and he an I both agreed that is ridiculous if you are a driver that does a lot of highway miles. I'd have to get mine flushed every 9 months if I followed that!