2005 e53 strange problems

[ioanradupavel]

hy there!
I have been reading a lot of posts on the forum but haven't found the answear to my problem.
my x5 started to act strange a few day ago when I was returning from a trip around the country side. when i entered the city, the signal light sound and dash board leds didn't function or were delayed. the computer started to act strange, like it was reboting or something, the radio controls didn't respond, nor any other media or navy controls. the engine was still runing and from this point of view the car acted normaly. but when I turned off the ignition and took the key out, the radio, ventilation, and all the electronics were still working like the engine was still running even if i took the key out and the engine was stopped. after this, I took off one of the battery contacts to try to reset the computer. it worked normaly for 2 day but the problem occured once more. and finnaly, this morning the car didn't start at all. it doesn't even crank the engine. it simpl doesn.t start. and when I take the key out of the contact, the ventilation, and the dash board light are still on. not to mention that the auto light led is blinking and the water temperature gage nidle is going like crazy. I don't know what the problem is. please, if you can help me, try to post some answears. I'll be glad to give more details if needed.

best regards, radu.