Transmission Filler Adapter tool, which one?
 

We just purchased a beautiful 2016 Countryman S ALL4 in midnight grey metallic.

We are a longtime BMW and MINI enthusiast family, and I've never bought into the "lifetime" fluid regiment. I'd like to to a drain and fill on the auto transmission every other oil change, that way the fluid stays relatively clean, but isn't as much of a "shock" as a full on flush (i.e. 3 drain and fills). I plan on using the AISIN branded Type T-IV fluid.

There are a couple tools I've seen made by CTA that make it much easier to fill the transmission. Do you know which one is correct for our Countryman? Is this the correct tool and any experience with it?: http://www.ctatools.com/index.php?ro...product_id=239

After some research, it appears that is the correct tool. Assenmacher also makes one: https://asttool.com/detail_page.php?...mber=ATF%20105