Particulate filter for retrofitting

Hello, I just got a letter from my friendly, which should remind you of the annual winter check. Furthermore, there is also the information here, that there is now to be retrofit particle filters for diesel vehicles. Quote: We can currently offer you the retrofit particle filter for the following models: S/V40 D4192T4 and T3 75kW and 85kW S40/V50 D4204T 100kW S60/V70/S80 D5244T and T2 96kW and 120kW (manual and automatic transmission) V70/S80 D5252T 103kW manual transmission XC90 D5244T 1 20kW automatic transmission The installation costs are Euro 740,00 incl. VAT. (country promotion from Euro 300,00 to 31.12.05 and any community promotion) from which company the particle filter comes is unfortunately not to be read, but will probably ask tomorrow times by phone. now my question: – is it worth the retrofitting of a particle filter ? – is the good feeling, the environment what good to do, actually worth 740,00€ ? – is there no performance losses or more consumption ? – s ind the 740,00€ well invested, as the resale may be facilitated thereby ? – has any of you planned the retrofitting in the next time ? greeting from graz Roman