appologies if this is not the place to post this. if this not the right place please direct me to where i should post this.

Need some help. need to know if anyone else has had any of these problems. i just bought a certified BMW 2007 525XI, i have noticed that the remote key that locks and unlocks the doors doesnt work properly, ie i have to be right next to the car for it to work. i have taken it in and they tested it and couldnt figure out what the problem was so they (unwillingly and rudley) gave me a new key and still no luck. Anyone else have this problem?
Also from time to time when i turn the car on, no sound, absolutly no sound comes out of the speakers, no warning sound that seat belts need to be put on, no radio, no sound from blueTooth when on phone????

Would appreciate any help on this, or any thought

i am assuming this is not the right place to post, can someone please direct me to the right place to post or let me know of another chat site that i can post to??

thanks