At lower speeds, not associated with braking, but the pitch of the slight scraping noise does change with speed. Noticeable at 25 mph and under.
Wheel bearings?
Brakes dragging?
-shawn

Check parking brake.

You might want to apply it while running at about 30 (make sure traffic is clear) while holding the release out a couple times, this will clear any rust off the drum.

If it is sticking, you will need to clean all the pivots, etc.

One reason to use it occasionally for parking on slopes is to keep all the bits moving independently so it won't drag when you DO use it!

Peter

__________________
1972 220D ?? miles
1988 300E 200,012
1987 300D Turbo killed 9/25/07, 275,000 miles
1985 Volvo 740 GLE Turobodiesel 218,000
1972 280 SE 4.5 165, 000 - It runs!