86 190E 16V with a 148k. Late spring I had all the fluids changed in the car, including the coolant. Over the summer, there did not appear to be any loss of coolant. Last week, the low coolant light came on while I was driving, then subsequently went off a few minutes later. Coincidentally, it was also the first time that the outside temp was in the high 40's, low 50's so the heater was on.When I checked the level, it was just above the sensor. I topped it off and began to check for any obvious leaks from hoses or connections. I did not find any, nor does it appear to be leaking from the heater core (no steaming of windows, no smell of antifreeze, no wet carpet.) I have looked at the exhaust and it is not white.

I have driven it since I topped off the fluid and it has not leaked since. I let it idle till the fan cycled on just to make sure it got into operating temps.

I plan to have the system pressure checked, but if anyone has any insights I would appreciate it.

Thanks.

Bob
86 190E 16V