The front brakes had to be replaced at 24K miles.
At 40K miles the back brakes had to be replaced.
Prior to this, I drove a Lexus for 60K miles before the brakes needed to be replaced.
We will be going back to Lexus and I hope I never live long enough that I am forced to purchase another Mercedes-Benz.
Dealers have only been marginally helpful and say this is reasonable wear - might be but isn't for a Lexus.