Hello all - 2010 S with 89,000 miles. My question today is about brake bleeding. About 3 years ago, I changed the pads and rotors but never bled the brake fluid. Lately, I feel like my pedal is softer than usual. I'm going to check the pad material and replace if necessary, but I've never bled brakes before. Just never came up - but I'm sure it needs it because the fluid is nasty and probably has contaminants in it. I've read up on the procedure for general brake bleeding, but now it's time to ask about my specific car. I ask specifically because the FSM states I should bleed the master cylinder, the ABS actuator, and the brake lines. Do I need to bleed all three, or can I get away with just doing the brake lines with the bleeders on the calipers and drums?
Also, since it has ABS, I read that I should do this with the ignition in the ACC position (not on). True, or doesn't matter?