I raised the same thing with my local mechanic, whose thoughts were that it was indeed strange that there's no mention in the owner's handbook/servicing schedule of ever changing the transmission fluid in the Koleos' CVT box. I recently bought a WS Fiesta, 2009 same as the Koleos, with a 4-speed torque converter gearbox and it's the same, no mention of a fluid change. The manual did say it should have had a new timing belt, so that was fitted although turned into a bit of a nightmare. Thankfully the Koleos has a chain, although I'm only up to 93k km anyway. The Fiesta's box got a small top-up because the driveshaft seal had been leaking and was replaced.