Kelem I have waited for the service interval. Its almost time.
You can do it sooner. The dealer has a computer that will hook
up to your X5 and reset the interval display. I run this truck
in the Mojave desert, which is VERY hot. Today after a very cool
spring (because there is no global warming), it got to 105.
AND I run it in the snow. There is no problems.
Also no knocking as far as I am aware.

__________________
2011 X5M
2006 X5 4.8is
2009 Porsche 911 PDK