Hi ive got the same problem on a 2000 P38 and the prob cause is the blender motors on the side you have no control over. These could cost from about £200 but you may souce them cheaper on Ebay. P.S They are hard to change as they are located behind the dashboard which has to be dismantled...

:) Hi Im new to this site so bear with me. I have a 2000 DHSE P38 Range Rover with a boring front grill. Is there anyone out there who knows where i can obtain a front grill which has integrill spot lights, i have seen one on a P38 but have no idea were i can get one from. Many thanks