Posting in here to see if someone has come across this before I start diagnosing. Went out to start the truck this morning, and it clicked but wouldn't start. I thought maybe dead battery. I jumped it and it started after a couple of minutes. I thought ok must be the battery. Threw the known good battery out of my benz in it, and it will still not start. It clicks like crazy, I have full electrical power, but will not turn over. Normally I would think starter, but it will start with a jump. I also checked all connections, and everything seems tight. Anyone have any ideas? It's a 98 V6