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Got some time to look at the car this weekend.
First tried gently pouring water into the sunroof trough at all 4 corners, the water flowed easily out to each wheel well with no puddling whatsoever. (Car sitting level).
Next I parked it engine downhill, and poured more water in the trough at the front. Still draining correctly up front.
Took the a-pillar cover off and it appears the drain tube is running through the internal part of the a-pillar (not visible from what you see with the cover removed, the only thing you see is the air bag squib).
Took out the speedometer cluster and felt around back there and could not detect any wetness.
Closed everything up and took it to the automatic car wash. Pulled the lower dash cover immediately afterward, and everything was completely bone dry.
Anyone have any clue how the water could have been migrating down the harness?
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The OM 642/722.9 powered family
Still going strong
2014 ML350 Bluetec (wife's DD)
2013 E350 Bluetec (my DD)
both my kids cars went to junkyard in 2023
2008 ML320 CDI (Older son’s DD) fatal transmission failure, water soaked/fried rear SAM, numerous other issues, just too far gone to save (165k miles)
2008 E320 Bluetec (Younger son's DD) injector failed open and diluted oil with diesel, spun main bearings (240k miles)
1998 E300DT sold to TimFreeh
1987 300TD sold to vstech
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