The fuel line bleed they sell at mazdatrix for 52.00, would it "fix" the flood problems. I ask this because I'm worried about taking my car to an exhaust shop, or get it aligned or whatever and they move it, then try and restart it and it doesn't. Would this cure it? thanks in advance.

 

That will only fix flooding problems other than caused by leaking injectors or low compression.

If you have low compression or leaking injectors you need to fix that first.

 

the bleed valve is junk. don't bother.

your s5 ecu should cut fuel automatically when the throttle is depressed fully during cranking.