Just remove the tank... turn it upside down and reinstall... simple.
Deceased - 2004 BMW 545i Black/Auburn
-Sports Suspension, Premium and Cold Weather Package, Logic 7 Professional Audio, Rear Sunblinds, Adaptive Xenon Headlights, Active Steering, staggered setup on 124's, Aux Input
MTEC V3.0 AE's, Black and white roundels, Clear LED Side-markers, New Conti ExtremeContact DWS's, Charcoal Filter Delete, 35% Tint, 20%rear.
GARY BETTMAN IS A TOOL!