I've had the car three years and it's never had driveability issues. I'll go with the Bentley Manual and install it with the arrows facing towards the nose. I can't imagine the filter would be mounted on the return side of the system. The Bentley Book shows the discharge end of the filter closest to the fuel pressure regulator module. Worst thing that can happen is that I have to repeat the job.
Fahren in seiner Äußerst Form