There are no round plugs in the dash panels on mine other than the ones that the interior lights go through. They are hardly large enough to make much of a difference if they were removed...which is not practical because of the lights.

The vents which feed into the doors to keep the windows clear almost seem redundant because the side vents can be turned to clear the windows if need be. So I had no problem in blocking those as well.

While plugging the lower vents may not be optimum...or even desirable on such a vehicle as the SL for the purist...the increased air flow in this Florida heat is greatly needed and appreciated.

__________________
Don
'85 500SL (Euro) - 186,000 w/a complete restoration and engine rebuild at 154,000
'95 C280 - 174,000