Constant velocity joint with visible snap ring
WARNING: This page is about a different car, the 2004 Volvo S40, 2003 Volvo S40, 2002 Volvo S40, 2001 Volvo S40, and 2000 Volvo S40. However, it is still accessible from the selected car via links, so may be relevant.
If the constant velocity joint has a visible snap ring, the snap ring must be held open and the constant velocity joint released. See Releasing constant velocity joint with visible snap ring . The snap ring is visible in a cut-out on the inner ring.