I was driving home today approaching an intersection at 45-50 mph when a driver on the other side took a left in front of me as if I didn't exist. I had about 1-2 seconds, slammed my brakes, and then collided with the other driver. We landed at the corner of the intersection. Thankfully no one was hurt. It was pretty fast but at the instance of the crash, I think the advanced collision warning alarm went off, the brakes locked up or ABS went off, then a flash, poof, and the airbags were out. When everything stopped I hopped out, trying to figure out what happened and then figure out if the other driver was okay. The driver's side curtain air bag snapped my glasses but that's about the extent of the injury to me. The other driver was driving a 2010 Audi A4. The picture doesn't show it but I totally t-boned her. I think that side of the car is 1/2 way into the car. Luckily there were no other passengers in either car. Now I have to figure what happens next. This was a 2 year lease which ends 9/15/2017. I have Amica insurance, the other driver has State Farm insurance. I was definitely not at fault, there was nothing I could do to avoid this. However, the police didn't issue a ticket to the other driver. She told them that I was in the left turn lane and then changed my mind and went through the intersection. The officer said her story didn't really add up because the impact wouldn't have been so big if I was starting from a stand still. Nonetheless they said they couldn't issue a ticket and regardless our insurance companies would determine fault even if a ticket was issued. Long story short, the S is a really solid car, the cabin was totally in good shape and I'm thankful for that. If anyone has advice or tips on how I should take it from here, it would be much appreciated. Thanks!