My girlfriend has a 2012 Jetta Sportswagen TDI that has a brand new battery in it. We put the new battery in this winter after her car was having a really hard time starting in the colder temps. It seemed to be fine for a few months, but has recently had a hard time turning over. If she doesn’t drive the car for 2-3 days (which is often during these days with the coronavirus and all) it will not start. The car sounds like it’s trying to turn over but it’s very, very slow. The lights on the dashboard are still coming on. Does this sound like it’s a battery issue again? Or could it be something else like the starter? I’m not super knowledgeable about cars (all my car knowledge comes from Car Talk) so any suggestions would be great.
Let me know if I can provide more info.