Hello! The headline says almost everything. The quite sympathetic, open & nice salesman said to my surprise: He had a circular from the manufacturer in which he would promise: All 6b-certified diesel Fzg from LR could be brought to real(!) 6d by means of an update. Since all already AdBlue would have been just an adjustment of the quantity necessary. That sounds great for me but I assume at the moment that it is rather “sales promotion” ” was steadfast as the bitter reality