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Old 03-21-2001, 04:42 PM
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Join Date: Feb 2001
Location: jErZeY
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What is the best way to remove the rear defroster switch on my 93 190e.Here's the short story just bought the car so i have no idea,no manual and the switch stays in the middle ,i know the rocker type switch is only On and Off but it stay in the middle of ON and OFF,My rear defroster is not working probably because of the switch?.help me out guys.thanx

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Old 03-21-2001, 05:32 PM
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there's no light when you toggle it to On .how do i know if i dont have a sufficient voltage to power the defroster.What do you mean when you toggle to On the rear deroster was on for time interval.How do you set the time.thanx

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Old 03-21-2001, 05:45 PM
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blackmercedes is right. Your rear defrosters probably do work, they just take forever to turn on becasue the power from the battery needs to build up. Its not a switch that gets locked in the on/off position. Push the top to turn on, push the bottom to turn off, but it stays in the middle after you let go. At least so it is on my 1994 C220 that I thought had rear defroster problems until I read the manual. Its probably the same with your 190E.
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Old 03-21-2001, 06:07 PM
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Join Date: Jan 2001
Location: the Netherlands
Posts: 1,417
Instead of up and down, it is right and left...but nevertheless, the switch stays in the middle.
Like blackMB-d JS said, change the fuse and try the rear defroster again. If you still see no control light, you should check possible power on the rear screen with a test lamp...
You can take out the switch side by side with a little flat screwdriver that is stuck under the switches side. You can check whether you have power at the back of the switch (and whether the connector is still plugged on).
The dash illumination in the switch is supplied by a coaxial cable, so the (possible) presence of dash illumination in the switch means nothing regarding to the rear defroster.

1990 300SL-24
1993 C250D
with a minor 600+k kilometer
(the Netherlands)
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Old 03-21-2001, 10:46 PM
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thank you guys for your response.What is the proper Amp of the fuse? i saw it yesterday it was color red but im not sure about right Amp.The rear connection is fine.
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Old 03-21-2001, 11:50 PM
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Join Date: Apr 2000
Location: So. Cal
Posts: 4,430
I believe it should be a red 25 amp fuse for the defroster.
Mike Tangas
'73 280SEL 4.5 (9/72)- RIP
Only 8,173 units built from 5/71 thru 11/72

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