You may be able to do this without removing the coffee maker's base, but it is a lot easier with it out of the way, and the pictures are clearer.

There are 8 screws, indicated by arrows in the pictures 4 Phillips No2 in the central area, and 4 Torx T20S2 security screws in recesses around the sides.

To remove the Torx screws, you can use a Torx security screwdriver as pictured. If you do not have one, it is possible to remove the screws by using a 2.5mm flat bladed screwdriver which is just the right size to fit between 2 lobes and the central pin in the screw head.