Hello Gil:

I can definitely tell you that there is no heat that comes out of the center vents, and this is totally normal. These vents usually go closed in the winter time, or if you would like some fresh air while driving with the heat on, open the damper a tad.

Hope this is helpful.

Take care,
Michael.

__________________
+AMDG+
2005 W203
Running as fast as I can to stay behind!!