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FM radio interference when rear demister is on.

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Old 10-22-2011, 03:15 PM
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Question FM radio interference when rear demister is on.
When I turn on my rear window demister, I get constant cracking through the FM stereo. Not so bad when I stop at the lights. When I turn off the demister, it goes away the radio is clear. All FM bands it seems. But AM radio is fine.

Anyone else get this?
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Old 10-22-2011, 04:39 PM
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THE C350
I guess there could be a ground issue in the rear glass or a short?
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Old 10-22-2011, 07:42 PM
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late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
Heater element & antenna are built into the rear glass. Check all connections especially the sticky pad at top centre of the screen. Give it a shove.

You don't have a metallic tint do you?
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Old 10-23-2011, 08:34 AM
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Originally Posted by Glyn M Ruck
You don't have a metallic tint do you?
I dont think so, I never modded a thing. Previous owner I think kept it factory also.
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Old 10-23-2011, 04:41 PM
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late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
Good!
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Old 10-23-2011, 07:53 PM
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2007 W204 220CDI Classic Sedan
Try isolating the rear demister if possible ie pull fuse or connecting plug & see whether the interference is still there.
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