BMW incentives and lease

Hello,

I am looking to lease a 435 Xdrive (or 428) GranCoupe from Milwaukee. I have been reading a few posts here on BMW’s which have been very helpful indeed.
However I am a bit confused about a few incentives which were mentioned. Could someone elaborate what a “drive off incentive” is?

And now that 2018 4 series would start its production in March-April 2017, would would be a good %age off from an MSRP on a 2016 model (which would have 2 younger siblings in the market in a couple of months from now). I hope it is more than 11%!
And is the residual value for specified miles/yr set in stone by the company/dealer or is that a thing which may be negotiated as well?

Would appreciate any input!
-Ali

For a 2016 model, you should expect 18-25% off.

Great.
And what qualifies as a drive off incentive?