I have a Mercedes Benz that has a major oil overheating issue. It is about to have its 3rd new engine in 70,000klms. 2nd engine was to fix the problem at 18,000 klms but 50,000 klms later, I now have to replace it again, bought new and serviced only by Mercedes. The 2016 model has been engineered to solve this problem. I have demanded a new replacement car. All the usual " fit for purpose, quality, safety etc etc" have been documented to the dealer. They don't want to comply naturally, however, I won't be put off, my question to you is: Will Consumer affairs, Fair trading or MTA back my demands? Has the Leglislation any teeth or can the Dealer just refuse and I will have to go down the Australian Consumer Law legal path?