[bmwcoder75]

you need emulator for your car , otherwise many thing needs to be replaced .

And why a lot elements should be changed? Ive retrofited to 2010 11 nbt and what had to be change was zgw. Only one issue left - PDC button not fuctioning. other things works as they should.

i am glad that i am not one of your customers , I would like to know the excuse you give to your customer for something like PDC button not working . 

we professional people don't offer anything that doesn't work 100% , the price of another ZGW is more than the price of the emulator , the different is that everything works as factory fitted .

You would be surprised, a lot of people would rather have a non working PDC button that spending 450 on a emulator alone (Or less for the PDC button emulator only)

I am not a fan either, but many are happy enough to lose that function and would not do the retrofit at all if they had to spend extra money for an emulator at all.