2004 Volvo S40 Owner's Manual - Page 48
2004 Volvo S40 Manual
Page 48 highlights
Replacement Insert a new bulb in the holder. Re-insert the bulb holder in the lamp housing and turn it clockwise until it clicks into place. Press the lamp housing into place. Make sure than locating pin (B) fits into the hole in the fender and slotted hole (C) around the screw. Tighten the screw. pg. 92 Replacing bulbs Replacement of rear light bulbs - S40 All the bulbs in the rear light unit are replaced from inside the trunk Procedure: Switch off the lights and remove the ignition key. Turn the clip 90° and pull it out. Fold the panel in the boot towards the middle so as to get access to the bulb holders. Push catches A and B in and remove the bulb holder. The bulbs are held in the bulb holder. Leave the connector and cables connected to the bulb holder. Remove the bulb by pressing it inwards and turning it a few degrees counterclockwise. Insert a new bulb into the bulb holder and replace the holder. Check that the bulb works and refit the panel.