Hi all , my 2010 a4 tdi started to idle really rough, it's still driving 100% just the bad idle, I had it plugged in and code p106500 is coming up , problem is its only telling me its a fuel pressure regulator, when I Google it there are x2 regulators , one on the rail and one on the pump, has anyone else had this problem and what was the outcome , thanks in advance and thanks for the ad 🙂