Because I am addicted to Mercedes vehicles, and because I seem to get myself into all kinds of trouble, I am considering whether a purchase of a Star Diagnostic Tool might be in order. I see a bunch of them offered on eBay but it is hard to tell if they are legit or knockoffs. A lot look like they come from China with MB Software loaded. Anyone have any experience with purchasing a Star Diagnostic Tool? Recommended model? I have a laptop that can run the software so I wouldn’t need that part of the package (maybe save some quid). As always, appreciate any words of wisdom.