We spend a lot of time in the mountains of Northern California. We have had many vehicles and many mouse problems. Some vehicles are good about keeping mice out others suck. I do not understand why car manufacturers allow mice to get in. Never had a problem with our old Mercedes nor with our Mercedes Sprinter nor our Lexus but have had horrors with other vehicles including a Honda an Acura and a Toyota. We just left the RR for a couple of weeks and mice or other rodents left evidence in the engine compartment but did not get inside. Did Rover actually make it impossible to get inside or are we just lucky so far? The usual points of entry in other vehicles have been the fresh air intake to the heater (should be called rodent intake instead) and also the vents that are supposedly to prevent windows from breaking when you close the door on an otherwise tightly sealed vehicle. At least 4 of our vehicles have had these vents covered with plastic grids that seemed to be specifically designed to let mice in. Why they could not make the grids smaller is a mystery. I have added stainless steel hardware cloth to these vents and never had a problem but it has been a real challenge to find the vents on some vehicles. It took months of pestering to get Honda to tell us where they were on our Ridgeline. So the questions for the Range Rover are: does the heater fresh air intake need to be mouse proofed or is it already? are there other vents that are not mouse proof and where are they located? it looks like the air intake for the engine is covered with a plastic grid that will not let mice through. is this true or do i need to find and fix something?