Happy 2013 !

So, I was in normal traffic, first thing I notice, the steering wheel was hard to turn. a few minutes later, I get a message to check my temp gauge, and it was all the way to red ! so I pulled over, turned it off. I peeked at the engine, the belts were destroyed and all tangled up.

So my friend tows me home, next morning, I realize the belt tensioner bolt for the a/c broke, causing the belt to get entangled in the water pump and well...so I was able to get a new bolt, new belts, car started up fine, and sounded smooth, after 'bout 40 minutes worth of driving, everything lit up, went to Trans fail safe, and I noticed the temp gauge go nuts, from high, to low, to med temp.

Even this morning, the car being cold, you could see the temp gauge go to red, then back to blue.

I don't think something really messed up happened (wishful thinking), since the car ran fine for a while.......any ideas? guesses?

thanks!!!

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2012
E70
3.0 Diesel
18K miles