I did a search, but didnt find anything. I know this is a common problem, so thinking that most likely there is a DIY somewhere on how to replace the vacuum solenoid,.....or whatever else might be involved

BTW, the car holds door lock vacuum indifinitely, so, at least that circuit is air tight.

Brian in Austin

Order the defroster pod and both for the blend door... these are all behind the glove box. Remove the glove box liner and it is pretty much self explanatory from there. Unplug vac connections, twist out old pod, toss in trash. Twist in new pod, plug in vac connections. I can do all three in about 30 minutes including cleanup and pulling glove box liner.

Do you have the Factory Service Manual?

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I'm not a doctor, but I'll have a look.

'85 300SD 245k
'87 300SDL 251k
'90 300SEL 326k

Six others from BMW, GM, and Ford.

Liberty will not descend to a people; a people must raise themselves to liberty.[/IMG]

I have a 107 FSM on disk

Check for vacuum first. A loose or leaking vacuum hose under the hood can cause this problem. Cheap/free fix maybe.

Paul

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84 500 SEL (307,xxx miles)