Isn't this a bit early to need rotors?
mostly highway miles, have 40,000 miles, am told at inspection need rotors? on 2010 Mercedes-Benz GLK350 4MATIC
not at all due to the soft metal that causes dishing from pads. you need to repl frt brakes and rotors to do it right, everytime
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It is a little early but not unreasonable considering Mercedes are heavy cars and a little rough on brake pads and rotors. Nowadays any time you are due for pads they just replace rotors too. No one really 'turns' rotors anymore.