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Old 10-13-2003, 06:56 PM
BobK BobK is offline
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Join Date: Nov 2001
Location: North Central Kentucky
Posts: 1,061
try this: with the pushbutton unit set to max fan, turn the ignition key slightly back from the "on" position, not enough to stop the engine, just a bit. See if the fan starts. The ignition switches go bad on these cars and that is one of the first problems you will see. My '87 560SEL needs it replaced right now and the part is sitting on the shelf in my shop waiting for me. Had to do same thing on my 123 300D. Same problem. Switch is not terribly expensive. Biggest problem can be taking apart the whole ignition lock to replace the switch, but I have to fix some dash light bulbs anyway..... I pull the whole dash cluster when I work on the switch.
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