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Old 02-19-2008, 08:11 PM
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hill hill is offline
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Join Date: Feb 2001
Location: Northern Calif Sacramento
Posts: 736
Originally Posted by 230/8 View Post
There is a vacuum actuated control valve at the firewall on the driver side. The valve may be defective. Its default position is on (heat), so you can try to run a vacuum line directly to it to see if it pulls it closed and turns off the heat. If not, then wire the lever closed until you can replace the vacuum assembly.

If your heater control levers are bad you can rebuild them cheap, but what a tough job. For now run the vacum line directly to it and use a pair of hemostats to pinch it if you need some heat. I heard that it might get down to 50 degrees
Happy Benzing
Darryl, Hill
2005 SL55 AMG Kleemanized
1984 500 SEC
1967 W113 California Coupe
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