So I followed this to a tee.
https://www.bmwrepairguide.com/bmw-e...-leak-bmw-e90/
When testing the leak it certainly appeared the leak was coming from the taillight. I did the fix and it appeared to be fixed when testing with a water hose. Problem solved. Or so I thought. Got a huge storm and low and behind tons water in the amp area again. WTF.
Any other suggestions here? I need this leak fixed like yesterday. Many thanks