Siemens DCA Vantage Operator's Manual page 99

6. Insert the tip of a straightened paper clip (or other like device) into the top
hole on the spring.
Figure 32 Return Spring in Cartridge Compartment
1 Top Hole
2 Leaf Spring
3 Bottom Hole
7. Gently pull the metal end towards the center of the cartridge compartment
to release one side of the spring from the cartridge holder.
8. Repeat step 6 to release the other side of the spring from the cartridge
holder.
DCA Vantage Operator's Guide 99