We have a 3 or 4 year old T4.95. It doesn't use DEF. We really like it, its very handy for feeding and smaller jobs. It struggles on a big baler, mainly from frame size and braking weight on hills.  Perfect size for a square baler and raking.  Ours is a shuttle shift with 12 gears. I wish it was a dual command or whatever they call it with a rabbit/turtle high-low button in each gear.

Be sure and buy the upgraded seat, and the heavier of the two loaders, if you get one.  We had to later add a third rear remote valve to run a bale retriever.