bbrande

I have a 2009 Audi a6 it rand and drove fine, no issues no stailling no problems dealer maintained, untill 105k, has 120k roughly now.. just had all lower/upper gaskets replaced and timing chain tensioners worked on. And everything was fine until I broke my back window while installing dyno mat on my trunk lid to prevent the rattling, but the whole thing shattered.. I went to the auto glass place and it took me 10 days to be able to order/get a new one, so I dropped it off at a shop cause it just stalled out on me 2x first time it needed a jump, second time it would not start. The battery keeps dying (witch was brand new 6mo old).. there was no check engine electrical issues, or anything else that could have caused the car to die.. after holding onto my car for 38 days, The shop called and told me it’s an electric problem and they cannot fix it, take it else where. I have yet to get a second opinion.. but the car was driving fine then just started stalling after the window broke and ofc it rained so stuff got wet in my trunk, is there anything that anyone could think of /recommend that may be of any benefit to my beautiful car! I would appreciate it if someone could help me with getting my baby running again.