hello, I have a v50 bj.2004 2,0D with 136 hp. now I had the evening message:motor system maintenance required. read out :fuel pressure regulator – short circuit on mass! side effect was that my battery was also emptied! have called at volvo times, the meant 316€ and it would be on the color of my valve tube! if I had had to change the nozzles too. 373€ the st! has ever made such experiences ever before? or any ideas? thank you