I popped mine off yesterday for a bluddy good clean - silver TDI bit was grubby.
There are three locating ball joints - one in the middle at the top and one either side nearer the bottom. They just pop in and out with a bit of a tug.
Sometimes I'll pull the whole lot toward you in one go (should just pop out ) and then other times a bit more careful and pop the two side ones first and the top one independently. TBH it don't really matter, but they do need a bit of a tug. Dip stick will stay in situ too.