X5 won't start
 

don't think it's the battery, but then again what do I know. The engine is not ticking over and I'm getting a clicking sound when attemting to crank the engine(full turn on ignition key)...starter gone?

i am preatty sure it a battery buy a $10 mulitimiter at your local autozone and check it...
good luck

will try that , thanks...

If lights play with that clicking sound, then it's battery!

I am looking into getting a replacement, anyone have any good recommendations, is the swapout a simple process?

My 2004 x5 did the same thing. It clicked when turning the key and lights were coming on and off (It was in garage). I thought it was starter but had it checked at auto zone and it was bad battery. Got new battery at Sam's club for like $78

there is a way of checking voltage with MID computer. cant recall how exactly but it intales unlocking your mid by interning sum of the i think last 4 of the vin number and then there are certain paramenter i think #8 that will tell you your voltage. search forum about unlocking the mid and all the info will be available.

if our cars can tell us this info, why cant we just access it easily!!! :stickpoke

Why are you asking me??? its the great minds at bmw engineering that made it that way. but there are whole bunch of info within! have you ever done the cluster check where all the light and meters light up and start moving?

heres the link to a diy DIY E39 Instrument Cluster Secret Features Unlocked! - Bimmerforums - The Ultimate BMW Forum