This is for all volvo S40 v80 v50 s80 s60 t5 xc90 If you can’t open the trunk from your key or from the button on the trunk. Look at wiring harness to see if wires are in tact and check button for proper voltage.
We just bought a 2012 volvo s60 t5. The fob and button wouldn't open trunk. We couldn't figure it out. Then we read the manual and it said if glove compartment is locked..the trunk release is disabled. Hahahaha good grief.