Please excuse my lack of engine knowledge, I have the 1.5 diesel B Max, could someone please tell me if it's normal for the engine fan to continue to run (very loudly) after the engine has been turned off? It runs for approx 2/3 minutes, and there is also a burning smell. I parked it up the other day and a lady came after me to say the car was still running. I mentioned this to the garage when it went in for it's check a few weeks after I got it, but they couldn't find anything. It's just so loud!