I took my X5 to dealer for a number of noise related problems, one of which just couldn't be reproduced while I drove around town with a mechanic in the passenger seat for more than half an hour.

And that was the knocking noise that sounds like stone chips are being thrown at the vehicle's fender and windshield. Without actually listening to the noise as it happens, the mechanic said it's hard to locate the problem and what it might be related to.

But he said he'll look closely into it and promised a software update as well.

For those having problems, all of you should go to dealers and complain so they may be able to find what's causing all this.

My other noises include the electronic beeping sound coming from the back of the vehicle every 10 second or so (even the mechanic found this noise peculiar), and a mechanical noise supposedly coming from the suspension when turning or going over bumps.