Hi. I have a 250 AMG LINE with the various packages, but the only thing I do by to have that I would like, is Distronic Plus cruise control. Does anyone know if this can be fitted retrospectively? When I bought the car in 2016 the dealer told me ‘no’. However, given the Collision Assyst Plus uses radar I believe, and I have cruise control, it would suggest that an upgrade is just a new stalk and maybe some software. Does anyone know if this is possible?