When braking I notice a low whine (sounds like blowing air across the top of a soda bottle) from the front. Pads and rotors replaced last summer and there does not appear to be any obvious abnormal wear. Rotors appear smooth. The whine happens after the car has been driven more than a few miles. I don't notice it the first 1 or 2 miles.

Is this an indication that the front bearings need repacking? This car is a 1992 300E with 175,000 miles.

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ARVY

1999 E430
1999 C230 Kompressor
1992 300E (write-off)
1984 190D 2.2 (sold)