Hello! I'm terribly sorry if this is in the wrong section. I'm new to the forum and to Mercedes Benz as well. I've owned audis and bmws my whole life and recently decided to give MB a try and I am very pleased so far. I got a 2009 c300 sport with the AMG wheels. Anyhow I'm having a few issues. I bought the car and had to drive it home 2 hours. About an hour into the trip the temp gauge on the dash started fluctuating from 90 to 100 to 115 then back down to 90. It was just all over, it never reached the red however. About a minute from my house the upper radiator hose blew out, I was able to get it home safely and replaced that hose the following day. My issue now is, the temp gauge still fluctuates like crazy, but only if I go on a longer drive, like 30-45 minutes. Also my AC blower slows down significantly when I come to a stop, and then speeds back up when I start driving. I'm fairly mechanically inclined, I've always done all of my own work on my previous cars successfully but am not too sure where to start diagnosing these issues. If anyone could shed some light that would be awesome! Thank you!