'79 300D Driver's side window.
Four months ago had new window motor
installed. O.K. Now the switch operates the
window intermittantly. When pressed either way it will not respond (the dome light does NOT dim, as a test indicator).
When released and pressed again a couple of times it will work the window.
Since the dome light doesn't dim does this point to a faulty switch rather than
say, a sticking window rail ?
Thank you for your tips and opinions.


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1979 300D
133K miles
1989 300SE
1995 C280

Window switches have always been a perishable commodity with MB. As it turns out the switches are usually just dirty. We disassemble them and clean (contacts) them quite often. The large chrome surrounded switches are particularly expensive and clean up well. I personally have never taken one apart but they do it in the shop every day. Its not quite as straight forward on that switch as the black ones (that are also so cheap that you might as well replace them).

If no one comes up with the trick I'll go learn and get back.

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Steve Brotherton
Owner 24 bay BSC
Bosch Master, ASE master L1
26 years MB technician

[This message has been edited by stevebfl (edited 03-22-2000).]

Thank you for your replies. I will attempt
to disassemble and clean it and hope for the best !

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1979 300D
133K miles
1989 300SE
1995 C280