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Old 02-22-2000, 11:57 PM
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I have a 1980 300SD and have located a vacuum leak in the A/C vacuum system. The leak appears to be coming from an actuator which is on top of the unit under the dash. It appears to be the actuator which controls the center duct. My question regarding this is how does one replace this actuator and is this actuator actually replaceable? I am contemplating removing the two ducts which go to the top of the dash for defrosting the windshield but this seems more complicated than it should. I am wondering if there is an easier way. Thanks.

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Old 02-23-2000, 09:21 PM
Registered User
Join Date: Mar 1999
Location: Suwanee, GA, USA
Posts: 4,712
For some, the only way is to take out the dashboard. I have done many.

1981 280GE SWB
1987 16V

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Old 02-23-2000, 10:49 PM
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Thanks very much. I was afraid someone would say that. Luckily I have the instructions for doing this. Are there any hidden hazards to doing this job?
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Old 02-24-2000, 10:00 AM
Dan Steadman
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I have a similar problem with an ACC actuator in my 1980 300D. I can see the actuator, and know it leaks, but cannot see how to get it out other than removing the dash. If you have instructions for removing the dash in a format that could be e-mailed, I would be grateful. Looks like if I could get my hand around the actuator it would not be difficult to replace. Any idea how long removing the dash and reinstalling it would normally takes? Thanks, Dan
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Old 07-04-2005, 08:12 PM
Join Date: May 2005
Location: CALIF
Posts: 508
Center Actuator Replace

1984 300d Remove 2 Center Vents Chrome And Move Rubber 3 In. Tubes
Look Inside Put Small Hands In Air Duct And Use Flat Screwdriver To Pop The Open Rod And Pop The Rivets Mounts And Remove, Install
New Acuator The Pull Lever Will Be Turn In Proper Direction

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