Battery is death and DVD Changer malfunction

[phatr1s]

Hi,

Last weekend my battery die on my 07 X5 with no warnings, when I tried to start it there was a lot of malfunctions display on my screen, I did jump start it ok, then I noticed no volume on my satellite radio, I can see the stations display but no volume, at the same time no GPS display on the screen, I removed the DVD disc and insert it again and nothing happen.
Sunday the XM radio work ok, but no GPS, I decided to take it to the dealer on Monday, my SA pulled the records from the truck and told me that due to short rides the battery won't charge enough and he recommend me to put it on a charger... I was like WTF?
Anyway, he called me later that day to let me now they check the battery and found no issues and they erase all the bad codes, but, they found the DVD changer was defective and they replace it with a new one (weird?).

I don't know what it takes to replace the DVD changer but, I know my unit has a small scratch in the front of the DVD and the same scratch was there. The next day the GPS map was gone, I removed the DVD and tried to insert it and did not go inside, like if something was blocking it. I went back to the dealer this morning and the comment from my SA "wow, 2 defective DVD units?".

Please let em know if some one had the same problems and what was teh solution.

Thanks