S80 door spring tension
 

The doorspring tension on my 2003 S80 is disconcertingly low - which compared with other cars, makes opening them too easy - especially if there's a bit of a breeze or tailwash from passing traffic.
I know it's only a matter of (not too much) time before one of them gets hit by passing traffic.

Is there anything that can be done to stiffen them up some ?

TIA