Purchased a second hand car in a private sale 11 days ago. Seller said it was bought brand new, never had a problem, serviced on time every time. I trusted seller because the mechanic that 'serviced' the car I know is good, honest and reliable. The next day, there were unsafe problems with the car when it gets too warm. The steering wheel is wobbly, vibration through whole car. It cuts out, sometimes I can't start it. I contacted the seller and they claim not to know anything about any of it. Now they are not answering. I have documents stating the same problems of the car, some say it was fixed, other say it needs to be. What legal rights do I have under Australian Consumer Law? Can I have the seller liable to fix the car?