I have a 190E 2.6. I recently filled up the the car with antifreeze (around 3 weeks ago) yet the coolant light will come on and off. I'm not sure what the reason for this is, can anyone help? [?] The coolant isn't leaking, either.
If you're satisfied that the coolant level is normal, then you have to suspect the coolant level sensor, which is attached to the plastic expansion tank. Perhaps a good cleaning of the electrical contacts will remedy the intermittent lights.