Accepted Answer

XXXXXXXX, there is a plastic rod that connects the shift lock knob on the shifter to the lower lock out piece, they break. you can remove the shift knob and loof down inside the shifter to see if it is connected to the knob, otherwise you will need to remove the shifter boot to check the other end.

there are 4 clips, 2 in front and 2 in rear under the carpet for the boot. if you find the rod broken it is a dealer item, or a volvo specialist might still stock one. you will have to remove the shifter shaft, this is down by removing the pin just under the shift boot, you will see a rubber grommet inside that grommet is a pin, you will need a small punch and hammer to start it the you can usually use a pair of pliers to remove it.
the shift knob pulls ff, but usually not easily.