I have a dash light on and I'm not sure what its for. The light is directly to the left of my outside temp gauge in the center of the instrument cluster on my 1990 300d w124. It is orange when lit and looks like a jug with low fluid in it. Please let me know what light this is. I have checked all my fluids and thay are all full. I'm thinking that I have a bad level sensor for coolant I don't have a owners manual to refrence so please help return my sanity. Thanx