If you were on a track and went from several hot laps to the pits
then you should cool it down.

For any driving you are going to do on the streets I don't
see why you should. The last bit of driving in a parking lot,
up your driveway, etc. is going to allow enough cool down time.

The older turbos were not liquid cooled like newer designs so
they could use a cool down period.

Also, use synthetic oil since it can take the added heat and
won't coke up on the turbo bearings like conventional oils (one
reason to do the cool down).

Overall, the turbo design in Volvo engines is very reliable (certainly
not the "weak spot" or anything to worry about).

Having said all that I do let my engine idle 15 to 20 seconds
before turning off (whil I gather up my cell phone, put a shade up
in the windshield, etc.). But 2 minutes, nope.