I just did a brake job on my 2001 c320 few months ago at
about the mileage as yours.

I found my front disks were worn just as bad as
the pads. I ordered a set of Balo and put them on as
well as a new set of pad.

The rear pads and disks have plenty left and they mayl probably
last till the front is worn again.


Your US benz dealer should cover the brake fluid
change under the regular maintanence program at the end
of your 3rd year maintanence visit. (check your car maintance
manual to be sure).