I have a 91 560SEL, I noticed a slight water leak starting to happen on the Left front side. It has rained a few days ago & I also washed my car today. I noticed the Left front carpeting slightly wet, To make a long story short, I have water slightly dripping into the left side front floor board looks like it is coming from the Pillar area near the windshield. I removed the plastic cowl trim on the left side under the wipers, cleaned off all the debris and cleared the drains. I had my friend run the hose while I monitored for the leak and still found water slightly coming in, before it gets any worse what could this be? I snapped a picture of the left side cowl area where the drain is and tried to get a pic of the left side bulk head under the windshield . Any one else run into this?

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2001 E55

2001 E320 Sedan

2001 Subaru Legacy

2006 SLK280

2016 Subaru Outback 3.6

I had rust on my car in the same spot as your first picture. Mine looked just like yours - before I started prodding and found there was a good fist sized rust hole

I covered it with fiberglass dipped in miracle paint No more leaks

-J

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1991 350SDL. 230,000 miles (new motor @ 150,000). Blown head gasket

Tesla Model 3. 205,000 miles. Been to 48 states!
Past: A fleet of VW TDIs.... including a V10,a Dieselgate Passat, and 2 ECOdiesels.
2014 Cadillac ELR
2013 Fiat 500E.

hmm.. I will look into this miracle paint and take apart the whole cowl & check out the other side of the cowl area. Thanks

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2001 E55

2001 E320 Sedan

2001 Subaru Legacy

2006 SLK280

2016 Subaru Outback 3.6