i have a 2003 range rover. the other day my air suspension inactive and HDC inactive message came on. also the ABS light came on and the break light came on they all stayed on. What could have caused this and what can i do to fix it... is it still safe to drive like this.

 

You shouldn't drive it with the suspension in the down position.
Not being a mechanic, you won't really have any luck finding and fixing this batch of issues. Do you have a shop to go to other then the dealer, if so better get there. The dealer will be your last option only because of their charges.

 

That is a BMW plant, Look on the front(next to wheel) passenger side put your head down there and if you hear a hissing noise the battery acid has eaten thru the air suspension tubing. Only one time I replaced a pump tank assembly. The other thing is if you are a real off roader, sometimes youll knock out a height sensor look under all four wheel wells and make sure the rods are all connected. scott