ok, i'd get worried...do not use the car until it is sorted. could be the bolt holding the wheel on, you have to disconnect the battery (for about an hour to be safe), then undo the two allen key bolts on the back of the wheel (these are supposed to be replaced with new ones), then the airbag section will lift off (BE GENTLE WITH IT AND KEEP IT IN THE UPRIGHT POSITION), then you'll be able to see the bolt. should be tightened to 50nm. theres also some bolts where the column meets the rack, maybe down in the footwell. probably worth seeing if the column is moving there before doing the anything