While under the car, I noticed the rubber fuel lines(on the 450 SEL) looked orginal with plenty of cracks and chaffing [Yikes!]. Anyone know the size of the lines (I'm guess 9mm but I always refer back to my VW)? Also, when I replace the lines, do I need to bleed the pressure from the fuel system? If so how and where? I haven't found it in the manual yet. Thanks.