New X5 Owner - Nervous

[sandplasma]

I had been looking for a 2000-2003 BMW X5 for a while and all I could find was grey or beige leather non sport. I wanted a black leather sport package with low miles. Most I've looked at have upwards of 160k miles. Anyway I finally found a black leather sport with 112k miles. I test drove it and everything seemed fine.

Now I take another look at the title and it says Miles 60,327/Actual with a purchase date of 06/14/13. The X5 itself read 113k. The guy also gave me a bill of sale that says 113k. I think he purchased it from an auction or something because the owner on the title says Zeus motors.

It has a few scratches here and there but its in good shape. The only thing that I'm worried about (besides the miles, running a carfax soon) is that the engine makes a noise like its ticking but its not a tick. It only makes it when I turn it on and its idling. It goes away when the rpms increase but its pretty annoying. Ill change the oil and see if that gets rid of it but I doubt it, will probably have to take it in.

Any ideas?