In other news, I'd just washed the car:
Quite happy because I've caught up on all the maintenance and got a few jobs done that have made a huge difference to how I fit into and interact with the car:
This has been annoying since I got the car, it rattles over bumps and lets the interior down, so what should to do?
Remove the Torx T20 screws here and here:
And pop off the temp-sensor cover here to reveal the third and last one:
Then pull the vent assembly forward and to the left:
In that last photo you'll see two tabs, there are another two tabs on the other side, you'll definitely need a tool of some kind now in order to pry the tube section off the (visible) trim section. I was convinced I was going to break something, but steady pressure caused the two parts to pop apart with no cracking.
You'll be left with this:
And you'll need to locate this:
In my case it was still attached to the bottom-most slat, lying down inside the vent. You'll need to click it back onto all the slats:
Then you will, for the first time, see this sight:
Put the vent-tube back on, taking care to get it over the four tabs AND LINE UP THE PRONGS ON THE VENT CONTROL with the middle of the three vertical slats as you push it together, leaving you with this:
Pop it back into the car, do the other side (which on mine was possible simply by reaching through the slats with a pair of needle-nose pliers as only the top few had come away).
Then put the car away and drive the Volvo to Saino's: