I have some real annoying rattling noise under my car somewhere everytime I tend to go over the slightest bump or speed ramp.

I have had a mechanic look under the car on a ramp and he cant see anything that appears to be loose or anything that seems to be tapping when driving.

The rattling somes from the rear underneath part of the car and also towards the passenger side where the wheel is and sounds as though something is about to drop off.

The bonnet is closed and on the screen it says Bonnet Open, I have opened and closed it numerous times yet the message wont go and doors wont lock!

For the bonnet opening error try this

http://www.rrsport.co.uk/forum/topic19762.html