BMW no power steering engine whistles

Thank You I have a feeling this maybe the problem. I did the Turkey baster and drained the fluid a few times and replaced it with new it seemed to make it steer a little bit better for a few miles. I looked for the power steering pump online and found a power steering filter? The car was just in shop for a fuel pump and was towed to the dealer where I bought it and from there to someone more qualified to repair the fuel pump. Both times the tow truck driver refused to use the factory tow hook with the car. I am hoping that this may not have caused my sudden power steering problem. When it happened with the car I had parked in a paring lot to pick up my son and when I started the car my traction control turned off on it's own with the power steering seeming to turn off to. The traction control eventually began working again after driving a short distance.