Releasing 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.
To facilitate removing the constant velocity joint, grind a drift as shown. Rounding the underside of the edge will stop the drift catching in the snap ring groove on the drive shaft. The slightly sharper angle (approximately 60 degrees) means that the drift has a greater mating surface against the inner ring.