Hi. I have had a 66 plate NP300 Tekna for 3 months but it has been in the workshop for most of that. 1st issue was losing coolant and oil. Under warranty it had the turbo boost pipe changed, EGR coolant pump, new hoses and a new battery. Same thing again happened again and they said it was the radiator cap. Yesterday when towing no more than 1.5 ton the MIL light came on, red, 6 times over the journey from Yorkshire to Leicestershire. It was happening every time it went up a gradient. The temperature gauge was going up too. Had to pullover in to the services. Went to the dealership today to book it in. Any ideas what it can be.