I was recently told by a BMW cert. mechanics' shop that I need to have my bearings repacked and all sorts of other axle stuff that I don't remember. It's about $1300 worth of work that I just can't afford right now. I can hear a slight knocking in one of the front wheels whenever I hit a small bump and one of my tires are wearing uneven in the rear. How long can I drive like this until the work just has to be done??? I don't want to damage anything else more than the tire wear. What can I do???