Hello everyone my name is Mario, I’m new to the club. I own an e46 m3 and a s1000r. Quick intro. I have an issue with my dads e64 640ci wondering if I can get some insight or help with it. This one has me pretty stumpy at the moment since I can’t seem to find the issue. Complaint: Car does not start right away, takes a few tries when battery is fully charged but recently is just hasn’t started at all. I changed the starter since he didn’t wait for me to diagnose and just bought the part and nothing, still same issues. We put a fresh battery in it and it started up fairly well then we let it sit for about an hour to try again and nothing. We put the jump starter on it from engine bay terminals and it starts right up. He took it to a place to check the alternator and they said it was working. Has anyone had this issue before? We’re busy with work so it just sits meanwhile but we would really like to get it up n running to be able to drive it. Thank you all who can help and took the time to read this. Have a great day!