Hi all. Just looking for some advice. Driving home my second hand nearly new ( March 2019) reg E220 estate today when the above message appeared 20 mins into my second part of the journey. Vehicle was serviced on 17th June. I had also heard a few slight popping sounds under the bonnet. When I looked at the engine oil level under the menu on the dash it shows the oil in the red zone with a temp which gradually increased from 129 to 133 deg C. But now after the car has cooled it's back in the grey zone. I got as far as my local mechanic who looked for a dipstick but there is none. He served that the coolant fluid felt too hot and observed it making a popping sound and there are droplets of it on the outside of the coolant tank ? I called Mercedes assist and they will arrange to look at it. It had been sitting on the garage forecourt since Feb owing to Covid. How worried should I be ? Really fed up as love the car. There is only 11000 km on it.