Originally Posted by Mike@N54Tuning.com
It works for most models but every now and again a model/option will come up that it doesn't work with. Might be the MSPORT package, etc. BMS has it running on their 2011 N55 135 DCT without issue as do many other customers on N55 335s.
so i just download the latest firmware and which option is it? because i didn't see it on the steering wheel options list...