I bought a new 2012 Q5 at the end of July 2012. Within 6 weeks the transmission needed to be replaced. The car only had 300 miles. It accelerated and surged dangerously while driving on a regular street. Then when I put the brakes on it downshifted funny making loud clunking noises. Everytime I slowed the car down the downshift clunking noise occurred. The car had to be towed. The dealer stated they couldn't replicate. Then after 5 days or so they said they would replace the transmission and it would come from Germany in 10 ish days. Then they called in 2 days and said the tranny was in (logistically impossible). I don't feel safe. This is a brand new car. I don't want a major system replaced and then have to drive this car. Anyone out there with advice?