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A friends MK111 Nav CD on his 2004 keeps ejecting for no reason. Never done it before. Will not stay in unless you power down and wait 5 minutes.

He has asked me for help and I am asking you guys?
 

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Mine has done this a few times, of note when I drive against directed by the Nav as I actually know a better route. It is as though the constant recalculation causes the unit to overheat and then spit the disc out. When I have examined the disc it was very very toasty!

Doesn't happen when not in use though.
 

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2002-2005 Range Rover MkIII / L322
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Strange that my RR MY 2002 has recently developed the same fault within the last few days for no apparent reason. I removed the old 2002 CD and replaced it with a 2009 update that I purchased a few weeks ago but had not got round to fitting. This appeared to cure the problem, the disk stayed put and the sat nav function was restored.

The low battery possible cause is interesting as I've posted previously on the forum the saga of the problems I've had in this respect with my vehicle along with a good many other owners it seems. I've been using my other vehicle for the past few days but when I went to unlock the RR this morning, absolutely no response to pressing the unlock button on the key fob. Unlocked the drivers door using the key where upon the alarm sounded so I immediately thought that the battery drain problems had returned although the vehicle has been performing perfectly for the past few months.

Key in the ignition and turned it expecting no response but the engine fired without hesitation and all the electrics seemed to be OK including the sat nav. Continual rain and damp conditions in Essex for most of the past week so I wonder if the high amount of moisture in the atmosphere could have any bearing?
 

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Low voltage on the battery can cause odd issues.

The battery is a 6 cell with each one being 2.1 volts. Full state of charge is 12.6V. Anything less than 12.25 NO MATTER IF THE CAR IS RUNNING OR NOT, will cause strange things to happen on the entertainment bus - I bus

Document from BMW here. Also shows how to test the battery
http://www.e38.org/battery.pdf
 
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