Thank you all for your replies.
I found the problem it is my center vacuum element. It is shot. I plugged up the leak with a stop for now and soon I will try to get the new one in. I hear that I have to remove my dashboard. THat does not sound like alot of fun but at least I know the problem.
Larry thanks for your response. It is a 1984 300d
You are famous on this board and we appreciate your guidance.
Happy fourth of July to all