My fan blower keeps blowing after I turn off the car. What is the issue and how can I fix it?

What is your question?

I noticed yesterday that the blower fan comes on when I start my car. When I turned off my car, the blower still remains on for at least 1 minute. I have checked the battery and seems good. I had engine light checked and I was told the codes my car reported had nothing to do with the issue of my fan blower. Any real suggestions would help?

What makes this problem better or worse?

nothing

How long has your 2006 Mercedes-Benz C230 had this problem?

a few days