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Old 11-14-2001, 05:47 AM
David C Klasse's Avatar
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Join Date: Jan 2001
Location: Mission Hills in the City of San Diego
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Rear Window Defroster (LED Flashes...)

My rear defroster switch flashes sometimes for about 5 seconds, then the light will stay on as normal.

I know it does this because it uses a lot of power, and then it returns when power is available again.

But everything is fine! I even have a new (roughly 3 month old) Mercedes-Benz battery. I can leave the lights and radio on for hours, and the car will still start. The battery and charging system are fine.

I know this is nothing to worry about, and probably a pointless post.

But.............. any thoughts?
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2006 E350 w/ 155k miles (Daily Driver)

Previous:
1993 300E 3.2L Sedan w/ close to about 300k miles
2003 E500 Brilliant Silver (Had 217k miles when totalled!)
1989 300E with 289,000 miles (had for <1 yr while in HI)
03 CLK 500 cabrio (Mom's)
2006 C230k (Dad's)
1999 S420 (Mom's/Dad's)
2000 C230k Sport sedans
2001 CLK320 Cabrio (Mom's)
1995 C280 My First Mercedes-Benz... (155k miles. EXCEPTIONAL AUTOMOBILE. Was Very hard to let go of!)
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Old 11-14-2001, 12:46 PM
Michael's Avatar
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Join Date: Jul 1999
Location: CT, USA
Posts: 2,699
Does this happen at or near idle? If so, perhaps your alternator is telling you it's tired...
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1995 E500 street car
1986 Porsche 944 Turbo S track car
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  #3  
Old 04-26-2002, 04:59 AM
David C Klasse's Avatar
CheFrac is Back!
 
Join Date: Jan 2001
Location: Mission Hills in the City of San Diego
Posts: 2,352
Follow Up...

Well, the solution just occurred to me a few days ago.
Firstly, I still occasionally get the flashing rear defrost light, but the charging system was perfect otherwise.

Well my blinkers are irratic (hazards too), my intermittent wiper work 5% of the time, and my rear defrost gets low voltage....
The connection??

It's all in that one combo relay!

Part No. 000-821-08-63 is selling for only $41.77 in Fastlane! I'll be ordering that now.

__________________
2006 E350 w/ 155k miles (Daily Driver)

Previous:
1993 300E 3.2L Sedan w/ close to about 300k miles
2003 E500 Brilliant Silver (Had 217k miles when totalled!)
1989 300E with 289,000 miles (had for <1 yr while in HI)
03 CLK 500 cabrio (Mom's)
2006 C230k (Dad's)
1999 S420 (Mom's/Dad's)
2000 C230k Sport sedans
2001 CLK320 Cabrio (Mom's)
1995 C280 My First Mercedes-Benz... (155k miles. EXCEPTIONAL AUTOMOBILE. Was Very hard to let go of!)
Reply With Quote
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