S-Class (W221) 2007-2013: S 320 CDI, S 350, S 450, S 500, S 550, S 420 CDI, S 600

Condensation in Headlamp

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Old May 6, 2013 | 07:37 AM
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From: Wash. D.C.
'20 S63
Condensation in Headlamp

Starting to noticed condensation in one of the headlamps. Did not see any cracks rock chips. Bad seal?
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Old May 6, 2013 | 12:15 PM
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Lamp unit is an open system (ventilated), if condensation does not dissipate in short period of time, may need replacement – reference bulletins LI82.10-P-051769 & LI82.10-P-050139.
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Old May 6, 2013 | 03:02 PM
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Thanks for the reply. It does dissipate....this is the first time I've noticed it. Have had the car for a year.
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Old Jan 14, 2014 | 02:06 PM
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I noticed this when I was picking up the car and it was freshly washed. It was on both sides of the headlights, the parking light area. I was told it's normal.
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Old Jan 14, 2014 | 05:13 PM
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From: JerSey
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Originally Posted by Jason B
I noticed this when I was picking up the car and it was freshly washed. It was on both sides of the headlights, the parking light area. I was told it's normal.
+1
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Old Jan 27, 2015 | 01:57 AM
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Originally Posted by konigstiger
Lamp unit is an open system (ventilated), if condensation does not dissipate in short period of time, may need replacement – reference bulletins LI82.10-P-051769 & LI82.10-P-050139.
Do these TSBs apply to 2013 S550? I searched for them but didn't come up with anything. I'd greatly appreciate it if someone can post (or link) them.

Cheers.
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Old Jan 27, 2015 | 08:52 AM
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Yes and it only happens in a car wash or if your are using a pressure washer. I hand wash and its never happened again. Mercedes all do this I'd there's too much water, whereas Lexus and others would never so this. Germans sometimes over engineer stuff.

Last edited by Jason B; Jan 27, 2015 at 09:37 AM.
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