Engine Failure problems of the 2008 Porsche Cayenne

While driving on the freeway my temp gauge started climbing and the low coolant light came on. I immediately pulled off of the freeway and had the car towed to a Porsche mechanic. He later identified the problem as the pipe or tube that connects to the water/coolant distributor came loose spilling all of the coolant out, which could of led to a catastrophic engine failure while on the freeway. Not sure what the cost is going to be yet. My mechanic said he's seen this failure on 957 Cayenne v8s many times. This is a dangerous thing to have happen on the freeway.