Since the coolant temp gauge in the car does not move above 95C until the car is not too far away from needing to be shut off, it is possible that the temp was slowly rising over a period of time. In this case, you need to determine whether it is a coolant flow problem or an airflow problem. Were you in stop and go traffic for a period of time leading up to this or was it open air driving? Also, do you know if the aux fans are operating properly. The mechanical cooling fan cannot handle all of the cooling air requirements of the car in heavy traffic without the assistance of the electric fans.

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Ali Al-Chalabi

2001 CLK55
1999 Dodge Ram 2500 Cummins Diesel
2002 Harley-Davidson Fatboy
Merlin Extralight w/ Campy Record