SL-Class (R230) 2003 -- 2012: Discussion on the SL500, SL550, SL600

Water intrusion

Old 05-01-2019, 02:59 PM
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2003 R230
Water intrusion

Has anyone had experience with water intrusion into the trunk from the antenna? Dealer is claiming this is why the TPMS control unit is out. Antenna is there but moves a bit according to them.
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Old 05-01-2019, 10:35 PM
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CURRENT: 2011 SL550, 2010 ML350, FORMER: 2007 CLK550 Cabriolet, 2002 C240, 2001 ML320, 1984 300TD
I guess it could happen. If the antenna is loose, it just needs to be tightened. I think there is also a thin seal on it where it sits against the fender.
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Old 05-02-2019, 01:35 AM
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2003 SL500
I used the RTV to make sure that there is no leak.
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Old 05-02-2019, 10:36 AM
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2004 SL500
I got water in my trunk when the trunk mounted (3rd) brake light lens cracked. Apparently, the 15 year old lense didn’t like cold weather this winter. Replaced it with a Dorman aftermarket light (apparently better than a genuine light) and no more water. By the way, the seal on the Dorman lense seems much better than the factory seal on the broken light.
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