Have a problem with the 750li bmw, when starting it appears that the gas is taking a minute to from the tank to the injectors, thus causing a rough start each time. What do you think the problem is ?

Possibly faulty fuel pressure regulator or dirty/faulty idle air control valve.

Could also be a vacuum leak.

Are you planning on fixing this yourself? on a 2005 BMW 7? I don't think so- just take it to your competent BMW mechanic, let him tell you what's wrong, and then let him fix it-

I put my BMW in the shop is a 750 l i I'm having drivetrain malfunction and when I stopped at a light my car goes into Park I took it up there 3 times and they can't fix it what's the next step do I put a lawsuit in