Water leak on drivers floor near trans tunnel - Page 2 - Mercedes-Benz Forum
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post #11 of 12 (permalink) Old 04-13-2019, 03:48 PM
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Date registered: Feb 2016
Vehicle: 2004 ML 350 w163
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also you can check coolant leak out of heat core or heat core piping. check if stains have the "oilish" look and feel when wet, if so, u will be sure about it.
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post #12 of 12 (permalink) Old 05-24-2019, 10:45 AM
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My 2001 ml55 had a problem with the automatic wiper sensor in the windshield (so the dealer said) and they replaced the windshield. The windshield installer totally hacked and scratched the paint & primer in and around the sealing areas (the truck was new at the time and I didn't know the damage was done). Needless to say, years later it rusted through and started leaking on the carpet like where you described. I had the windshield replaced 3 times since then, finally had it removed, taped off everything, then sandblasted the rusty pinholes, metal etched, metal filled, primed and painted the frame work. The windhield prep primer (the black goop with dauber ball applicator) re-acted to the paint/primer and broke the bond between the caulk and the primer, started leaking again! On the last attempt, I told the installer NOT to use that glass/metal primer stuff, but he insisted, and broke out his 1/2 dried up 8oz can of lumpy black stuff and smeared it around. It hasn't leaked yet, but what a issue! good luck with that...

Test for leaks with a real soapy solution or sprayaway window cleaner around the outside trim, then use a rubber tipped blower on the inside and blow around the framework crack. The leak should show up by making larger bubbles by the leak next to the windshield trim.
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