So this is a really strange and frustrating issue. I had a really bad rattle and a knock in the steering so i took it to the dealer. They diagnosed it as a faulty CV axle and rack and pinion steering gear. So i ordered and replaced them both myself. And it seemed that the problem was solved. Fast forward a week later and the rattle is coming back slowly. It rattles when going over bumps or rough patches in the road. Also when i am driving at speeds of 50 MPH or faster, but only when the wheel is straight. If i turn the wheel slightly either way, the rattling stops. Any assistance would be greatly appreciated!