Having an issue with my 1995 C280 overheating. Typically runs in the range of 80-90C and recently, although the weather has not been above 80F, the car has been moving towards 105-110, up to 115C when its idling in traffic, or even parked with the air conditioning on. Took it to the dealer and they replaced the fan as well as the thermostat.. and the problem continues to exist. Can someone help diagnose what this might be?