My car has been making noises when I brake and turn at the same time (pretty low speed ~5mph). At first, I thought it was the suspension...maybe the bushings were worn. But it doesn't make any noise when I turn but don't brake (over the same turns). I was watching Motorweek, and the tech guy giving advice was mentioning that brakes needed "maintenance" every year beyond just checking the pads and rotors. It involved greasing up 2 locations on the brakes (I believe brake bushings was one of them) and that there were 2 specifics lubricants to use and not to mix the 2 up. Anyway, any detailed info on my Mercedes regarding the noise and the brake maintenence is appreciated. Thanks.

Lubing NEW pads so that they don't squeal is normal maint. However it sounds like the LOWER control arm bushings may be causing your noise.

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The dealer replaced the lower control arms and bushings at 30k. My car now has 49k. Is this normal? Do they need to be replaced or just lubricated? And what kind of lubrication? Thanks.