1989 Mercedes Benz SL500 Air control to the vents

1989 MERCEDES BENZ SL500
87,000 MILES • V8 • 2WD • AUTOMATIC
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JONJUAN69US
  • MEMBER
  • 1 POST
My air cools great, but no matter what setting is selected on the auto control, air blows through the defrost as well as the vents causing the windshield to fog up? Does this sound like a vac. issue or something else? Thanks!
Aug 13, 2008 at 11:47 PM
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GFIMOTORCARS
  • ✓ASE Certified Mechanic
  • 673 POSTS
  • ASE Certified Mechanic
You are probably seeing one of two things happen. Either you have a vacuum leak to your blend doors or your AC pushbutton module is failing.
Jan 4, 2009 at 11:21 AM
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