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Old 02-10-2002, 04:37 PM
400E 400E is offline
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Join Date: Jun 2001
Location: Omaha, NE
Posts: 962
I would seriously wonder if the door which closes off the outside air intake and causes interior air to be recirculated is stuck closed. I've had this happen in other vehicles with manual heaters if the recirc. button is left on during the winter.

I don't understand MB climate control systems well enough to say anything more specific, but hopefully someone with some hands-on knowledge will respond.
'93 400E
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