Had a rear brake caliper dragging. Sooo, I replaced all the hoses, and that caliper. Flushed with clean DOT 4 fluid. Calipers are pretty cheap from the auto parts store $51.
Also today I replaced the belt tensioner shock, it was rattling pretty good at idle in drive and making my 300se sound like a diesel. Had to drop the water pump pulley off and loosen the belt to get to the lower bolt. The old shock had a dead spot in it, and the bushings were dried up.
Had to get a new M7 bolt for the top of the shock, the original M8 bolt wouldn't fit.