Soot particulate filters

Hello together, I just got an offer from my Saab dealer for diesel particle filter retrofitting. 2.2 TiD for 990,00 Euro, 3.0 TiD for the complete price of 1,190,00 Euro. When I bought my 3.0 TiD with 47,000 km almost 2 years ago, I would have immediately “schlag”. At that time I didn’t know anything about the running bush problem and found the car just great. But today, with 70,000 km (not yet recognizable motro problems) I would not venture without “back cover” from eu We are also waiting for the funding programme of the Federal Environment Ministry. But there is it, the DPF for retrofitting. I would like to know whether the retrofitting could have an impact on engine durability.