C220 sounds like a vacum at start and consistantly low on coolant
when ever I start my car I here this loud vacum like noise which only lasts for a couple of minutes and then is gone. It also does not happen all the time. I also have had my coolant light come on repeatedly. As far as I can tell ther is no fluid under the car. I cannot find the leak any where. I can fill the coolant up and in two weeks it will say it is low and the resivoir is almost dry. Any help with these problems would be great.