As others have said, it's a safety feature and can't be turned off by the driver.
You may be able to turn it off through coding however.
2006 BMW E60 520d SE 6MT
2009 BMW E90-LCI 330d SE 6MT
Current: 2012 F30 328i Luxury 8AT
2015 Audi A6 Avant Ultra, Black Edition (sorry!)