I take good care of my VW Jetta -- regular oil changes, Shell gas, etc.
Recently, car would not start. Went to Auto Zone; they did a free diagnostic check and reported the battery was good. Took it to a local shop, and they said it was probably a mechanical problem with the fuse box that's located on top of the battery. They said it could cost over $1,000 to repair because it's a VW.
I researched the Internet, and read a lot of reports of simple fixes to various problems, like removing a fuse, waiting a minute, then putting it back in and it would work again. But I couldn't find a simple fix for my car not starting regularly.
Nevertheless, the idea came to mind that my "starting" problem might be something simple, too, and I might get lucky and not have to spend a ton of money to fix it, if I just kept reading. After all, sometimes it would start, sometimes not, but a jump always got it started. Well, I read on, and on, and nothing. I thought about it some more... it's got to be something simple... well, it was. I had parked it on an incline with engine pointing upward -- not good. So, I started backing it up into my parking spot with the engine pointing downward, so that everything would drain toward the front. Now, it starts fine every time.
Apparently, it was something simple. It wasn't removing a fuse that fixed it -- it was parking it at a downward slope.
I hope this works for you.
Also, insofar as the free diagnostic from Auto Zone -- awesome, because now I have an idea of what to expect for repairs needed. Down side -- even though I had the free diagnostic, most shops gave me a hard time and tried to charge me over $100 for their own diagnostic check. They refused to change the temp sensor without doing their own diagnostic check. One guy -- a foreigner ---- started yelling at me because I told him what I wanted repaired on my car, so I left.
If you find an honest mechanic, he is worth his weight in GOLD.