stoney2013

Hello. I am back. Just bought a 2007 Cls500, (5.5) with 59k uk miles. Car runs well except one small issue. After washing car the other day using jet wash I noticed some small droplets on main rear windscreen on inside. When looking at car from behind it is to the right and just a few droplets on lower right corner. When I used a laser pen to shine through lower cealant I could see a small hole in the glue in bottom right corner which would probably leak when using pressure such as a pressure washer. No signs of damp or water when raining though. Any ideas, is this a common issue? When searching I found others had posted about trunk leaking but my trunk is bone dry etc.
What advice can anyone offer?