I have a 2006 MCS
with a manual transmission. I have had the car since mid November 2012. It has almost 78K miles on it. I have experienced an intermittent problem twice. At slow speeds the temp gage would climb up until it was pegged high. Increasing engine speed would bring the temp down. I found the coolant was about a quart or so low so I topped it off with the proper coolant for the MINI. Several weeks later it occurred again. Again the coolant was low so I topped it off. I have not noticed any leaks. I had the oil changed at the dealer where I purchased the car just prior to the latest episode and they found no leaks as well. What should I be looking for? Does anyone have an idea what the problem might be?