Went out to work on replacing the radiator overflow hose and X5 has given up the ghost - no interior lights, won't even turn over. Got hosed replaced but had to work today so had a look tonight. Thought I'd just jumper the X5 with my Tundra. Got everything hooked up, tried to start but just a clicking sound. So if the battery in the X5 was completely gone, shorted cell, etc, would it keep the battery "jump" from being able to start the X5? Can pick up a new battery tomorrow but don't really want to 'shot gun' the problem . . . thanks in advance - 2002 X5 4.4i